单选专题训练(一)
初中八年级英语单选题专题训练100题(含答案)
初中八年级英语单选题专题训练100题含答案一、单项选择1．—Do you like watching sitcoms.—________.They are boring.A．Yes，I do B．No，I don't C．Yes，I did D．No，I didn't 2．A: Is your dictionary on the sofa?B: ________.A．Yes, I am B．No, I don’t C．No, it isn’t D．Yes, it isn’t 3．—Could you tell me something about the boy in red?—Sorry. I know nothing about him. We are ________.A．friends B．neighbors C．strangers4．________ nice weather it is! It’s the best time to fly kites.A．What B．How C．What a D．How a 5．Jack is ________ in our group. No one studies harder than him.A．the hardest B．the laziest C．the most hardworking 6．—Is this his book?—________. It’s her book.A．Yes, I amB．No, it isn’tC．Yes, it isD．No, he isn’t7．—________ there any flowers in our classroom？—Yes,________ .A．Are, there are B．Is, it is C．Is, there are D．Are, there is 8．—Look, the boss is angry with Alex.—Well, he came late again. But that’s no ________ to shout at him.A．problem B．lesson C．question D．reason 9．She was so angry at _______ he was doing _______ she walked out, and closed the door heavily behind her.A．what; that B．that; what C．that; that D．what; what 10．_______ number of students in our school is 26000._______ number of them go toschool by bus.A．A; A B．The; The C．A; The D．The; A 11．You need to eat a ________ every day.A．egg B．fish C．carrot D．bread 12．Linda usually helps her boss type letters. She is a_______ .A．worker B．businesswoman C．secretary D．shop assistant 13．These are her ________.A．friend B．sisters C．brother D．uncle14．---Excuse me, sir. Could you tell me _______ to Ciqikou?---Yes. Take NO. 808 Bus and then you can get there.A．how can I get B．how I can get C．where can I get D．where I can get 15．Do you believe some special dogs can do things ________ man?A．as good as B．as well as C．as soon as D．as careful as 16．Our English teacher asked us to read a favourite book and then wrote a ________ of it. A．review B．sense C．memory D．record 17．用来表示“中国中央电视台”的是___________。
初中英语单选题专题训练100题含答案
初中英语单选题专题训练100题含答案一、单项选择1．—What do you have for lunch?—I like________ , because ________ are good for health.A．milk; it B．tomato; they C．vegetables; they D．ice-cream; it 2．下列四个选项中不含有字母Aa的发音的一项是________。
A．thanks B．H C．Dale D．Grace3．________ he ________ a round face?A．Do, has B．Does, have C．Does, has D．Is, have 4．Today is Tuesday. Tomorrow is ________.A．Wednesday B．Friday C．Thursday D．Monday 5．Clark usually ________ up at 6:30 every morning.A．get B．got C．gets D．getting6．下列字母中书写体占上中下三格的是：A．h B．f C．g D．t7．— It is said that Lin Tao saved an old lady from a big fire two weeks ago.— Yes. _________ brave young man he is!A．What B．What a C．How D．How a 8．—Would you like something to drink?—Yes. Please give me some ________.A．rice B．milk C．oranges9．Mrs Smith lives in our building. She is really a good because she is always ready to help people around her.A．visitor B．waiter C．neighbour D．artist10．I’m surprised to know that ________ can live without water for a long time in dry places.A．snakes B．dodos C．camels D．elephants 11．Grandpa ________ glasses when he reads.A．wears B．wore C．has worn D．was wearing 12．—Lucy, can you draw?—_____ But I can sing Chinese songs.C．Yes, I can’t.D．Yes, I can.13．Ed Smith doesn’t play sports．He only _______ them on TV．A．watch B．watches C．sees14．_____ he have a long nose?A．Do B．Does C．Am D．Is15．— We don’t have eggs, Mom.— How about going to the ________ to get some with me?A．school B．library C．classroom D．store 16．John has a model plane, but his sister ________.A．doesn’t B．isn’t C．don’t 17．—Hello? May I speak to Lisa, please?—Oh, she has gone to the museum. Would you like to leave a ________?A．sentence B．message C．program D．question 18．The mobile game Travel Frog is popular with many people. They can’t wait to see if the frog comes back _________ they have time.A．when B．although C．before D．because 19．In which group, the three words belong to the same kind?A．reading; dancing; morning B．volleyball; swimming; tennis C．study; biology; hobby D．swimmer; world; museum20．A (n)__________ is a person whose job is to take care of people’s teeth.A．director B．engineer C．dentist21．Mr Brown is a teacher _________ is strict with all his students.A．which B．who C．where22．More trees _____________every year to make our city greener.A．is planted B．are planted C．was planted D．were planted 23．He goes to the __________for teeth cleaning twice a year.A．teacher B．dentist C．school D．museum 24．I’m not sure if Lily________ me. If I ________, I will go with you.A．will invite; will be invited B．invites; inviteC．invites; will invite D．will invite; am invited25．I don’t like math _______ it’s too difficult .26．— Could you help me do some cleaning after school?— If I _______, I will do it.A．am free B．will be freeC．have had time D．had time27．—Oh, there isn't enough for us in the lift.—It doesn't matter. Let's wait for the next.A．ground B．floor C．place D．room 28．--- Look! Some people are running the red lights.--- We should wait __________ others are breaking the rule.A．if B．until C．although D．because 29．—Finally our class ________ Class Two and won the first prize.—Congratulations!A．beats B．beated C．beaten D．beat 30．“Trick or treat” is a game played by children on________.A．the Lantern FestivalB．HalloweenC．Mother's DayD．Father's Day31．Nanjing Road Walkway is _________ of all the streets in Shanghai.A．crowd B．crowdedC．more crowd D．the most crowded32．I think ________ children learn to look after themselves, ________ it is for their future. A．the earlier; the better B．the earliest; the best C．the early, the good 33．一Do you like this brown shirt, Jack?一It isn't the right _____________ . It is too big for me.A．price B．size C．colour D．style34．--- The two old friends were ______ busy ______ with each other ______ the time.--- Yes. They hadn’t met for long.A．too; to talk; to forget B．too; talking; to forgetC．so; to talk; that they forgot D．so; talking; that they forgot 35．—Remember the first time we met, Joe?—Of course. You _______ in the library at that time.A．are reading B．were reading C．have read D．read 36．—Nothing matters more than people's safety and .—Yes, life is the most important.A．health B．wealth C．happiness37．I think the homeless cat is quite weak, so she well later by us.A．will be looked after B．has been looked afterC．is looked after D．was looked after38．My grandfather ______ a walk every day. He keeps in good health.A．takes B．take C．taking D．to take 39．Look! That is an______A．UFO B．bookcase C．ask D．eraser 40．— I called you at ten o’clock this morning. Why didn’t you pick up?— Sorry, I ________ the coronavirus vaccine(新冠疫苗) in the hospital at that time. A．will get B．am getting C．got D．was getting 41．– _______ Candy good at ________?– Of course. She is a good swimmer in the school team.A．Is, swimming B．Does, to swim C．Is, to swim D．Does, swimming42．--Can you spell it?--_______A．p-e-n.B．P-E-N C．Yes.p-e-n.D．Yes. P-E-N. 43．Since nothing is ________ than health, you should live a healthy lifestyle. A．valuable B．more valuable C．most valuable D．the most valuable44．—Were you at home at 7:00 last night?—Yes，I______at that time.A．do my homeworkB．did my homeworkC．was doing my homeworkD．am doing my homework45．下面四个标志中表示中国中央电视台的是.A．B．C．D．46．Big TV's aren't popular today _______ most people watch shows on their phones．A．even if B．so thatC．because D．as long a s47．—My parents always think “________.”—Not exactly the case, they just encourage you to be better in this way.A．Every dog has its dayB．Many hands make light workC．Too many cooks spoil the brothD．The grass is always greener on the other side48．The winter holidays are coming. David and his sister _____ them in Sanya.A．spend B．is going to spend C．are going to spend 49．_______ tourists want to know the history of China, _______ they can visit the museum. A．/… if B．Because… /C．/… so D．If… / 50．Computers are very useful. They can help us get much ________ on the Internet. A．difference B．magazine C．information D．reason 51．Kobe Bryant was a very _______ basketball player, and he could play basketball very _______.A．well; good B．good; good C．good; well52．The boy ______ animals and he can jump ______ many animals.A．likes ；like B．like；likeC．like ；likes D．likes ；likes53．_____ middle school students allowed to use mobile phone at school ?A．Do B．Did C．Are D．Can 54．—Linda, can you tell me something about Tu Youyou?—Sure. She is the woman won the Nobel(诺贝尔) Medicine Prize.A．which B．whose C．who D．whom 55．My cousin is going to work harder on________ because he wants to be an excellent scientist.A．science B．education C．medicine D．math 56．That film________magic because you can feel the wind and smell the food. A．like B．is like C．likes D．look like 57．Do you know the girl ________ won the first prize in the competition?58．---- The weather report says that it tomorrow in most parts of Hezhou city-----If it ,we won’t take the PE lesson.A．will rain; will rain B．will rain; rains C．rains. will rain D．rains. rains 59．There ______ a number of books on the bookshelf. And the number of the books ____ 50.A．are; are B．are; is C．is; is D．is; are60．If it ________, we ________ go to the Great Wall tomorrow.A．rains; will B．is raining; will C．will rain; won't D．rains; won't 61．Stephen Hawking’s story gives me much___ to face all kinds of difficulties. A．chance B．wealth C．courage D．decision 62．—Let’s go to the zoo this weekend.—Dad, you said so last week and the week before. ________.A．No pain, no gain B．Practice makes perfectC．It never rains but pours D．Actions speak louder than words 63．—What’s your job, Henry?—I’m a ________. I work late. I’m very busy when people come for dinner.A．nurse B．reporter C．waiter D．teacher 64．—Are you going to go skiing in Zhangbei next month?—I’m not sure. It all depends on _______ then.A．if I’m freeB．when will I have timeC．if I’ll have enough time65．—Did you see Mr. White just now?—Yes. He ________ his car when I met him.A．parked B．was parking C．is parking D．parks 66．There is something wrong with his ________. He is deaf.A．eyes B．legs C．ears67．My father ________ a ping-pong, but he ________ a ping-pong bat.A．have; has B．has; doesn’t have C．has; doesn’t has D．has; don’t have 68．—Could you tell me ________ back from her hometown?—Yes. She’ll be back this Sunday.A．when Alice came B．when did Alice comeC．when Alice will come D．when will Alice come69．My father’s sister is my________.A．grandmother B．cousin C．aunt D．uncle 70．The old man eats a little meat every day, such as ________.A．potatoes B．eggs C．sausages 71．Physics ______ my favorite while politics ______ her favorite.A．is; is B．are; is C．are; are72．Lily _______ a new schoolbag. _______ some books in it.A．has; There is B．have; There are C．have; There is D．has; There are 73．________ people ________ English in the U.K.?A．Is; speak B．Does; speakC．Do; speak D．Are; speak74．I think I will have a ________ holiday soon for coming National Day!A．three-days B．three-day C．three days D．three day 75．—Are those your pens? —______.A．No, it isn’t B．Yes, they areC．Yes, they’re D．Yes, it is.76．Excuse me. Could you please tell me _______________?A．how get to the Pacific CinemaB．how I got to the Pacific CinemaC．how I can get to the Pacific CinemaD．how should I get to the Pacific Cinema77．_______does Jack get up? He usually gets up____7:00____the morning.A．What time ,at,in B．When,in,on,C．How,at.in D．Where,in,after78．For some , he didn't come to the meeting.A．advice B．decision C．reason D．choice 79．— What kind of home do you live in?— It’s ________ with thirty-six floors.A．a townhouse B．a farmhouse C．an apartment80．一Could you show me how to use the new mobile phone?—Why not read the ________ first? I'm not sure about it.A．instructions B．introduction C．information D．invitation 81．_________listen to music in class.A．Don’t B．Isn’t C．Not82．We have some and for dinner.A．chickens ,hamburger B．chickens,hamburgersC．chicken,hamburger D．chicken,hamburgers83．What is the smallest of these?A．Rafwd B．Anm C．Niatg D．Sreoh 84．He __________ some cooking at that time, so ___________me.A．did, heard B．was doing, heardC．was doing, didn’t hear D．did, didn’t hear85．The visitor told a very ________ story about what he did for a ________ in Africa. A．lively; living.B．lively: life C．living; living D．alive; live 86．—Father’s Day is coming. I’m thinking about ________.—Good boy!A．what present I gave my father B．how I can give my father a surprise C．if I planned a party for my father D．where will my family have a big meal 87．Li Ming has______ brothers______ sisters.A．no, and B．not, and C．no, or 88．—Mary, I heard that you moved last month. What’s your new ________?—I live at 205 Helping Street now. Come and have a coffee if you are free.A．plan B．job C．hobby D．address参考答案：1．C【详解】句意：——你午餐吃什么？——我喜欢蔬菜，因为它们对健康有好处。
带答案高考英语单选题考点专题训练
带答案高考英语单选题考点专题训练单选题1、I hope the car won’t ________ while we’re driving in the countryside.A．break inB．break downC．break upD．break through2、_________they hard-working?A．IsB．AmC．AreD．Not is3、A new study shows anger may help people reduce the negative impacts ________ stress and help you become healthier.A．inB．ofC．onD．at4、The organization assists people based on need and gives the top _______ to those in the most serious and immediate danger.A．devotionB．divisionC．potentialD．priority5、______ black box of the two could be found first is a matter of public concern. A．WhichB．HowC．WhereD．Whether6、Improperly moving a person with a neck injury, for example, can ________ permanent spinal injury and paralysis. A．result fromB．suffer fromC．take onD．lead to7、One unfortunate accident in 1994 ______ an above-the-knee amputation(截肢) of Amy Palmiero-Winters’ left leg, leaving the passionate runner learning how to walk again.A．came afterB．cracked downC．resulted inD．took over8、—Mum, it is nice weather. I want to skate this afternoon.—Don’t you think the ice on the lake is too thin to _________ your weight? A．absorbB．bearC．catchD．take9、The man ________ you shook hands just now is our new English teacher.A．with whomB．whomC．with whichD．which10、An artist who was recently travelling on a ferry to the southern island discovered ______ a long lost antique Greek vase.A．at randomB．by chanceC．on occasionD．in turn11、The________ gained from this experience has invested my life with new meaning. A．departureB．insightC．proofD．setting12、In order to make greater progress in English, he attends extra classes ________.A．every other daysB．every other dayC．each second daysD．each two days13、—What did she say to you just now?—She asked me if I knew _______.A．whose pen is itB．whose pen it wasC．whose pen it isD．whose pen was it14、________ is known to the world, China’s Liu Xiang became the first Asian in history to win the men’s 110m hurdles at the Olympic Games.A．ThatB．WhichC．AsD．It15、Usually, there is an interval between the two parts of the concert _____ the audience can buy something to eat or have a rest.A．thatB．whichC．whenD．where16、______ darkness had again descended upon me ______ how much I had left unseen.A．When; I had realizedB．Only when; did I realizeC．Only when; I realizedD．When; I realize17、It has been ______ all over the world that China has made remarkable achievements in economy. A．acknowledgedB．criticizedC．assumedD．overlooked18、Your brother seems to be a good driver; ________, I don’t worry about the safety of my trip.A．even soB．even thoughC．thereforeD．however19、The social media platform Twitter found that the laughing face with tears of joy was the most used, ________ by the crying face and heart eyes emoji.A．followingB．followedC．being followedD．to follow20、Tomas is a very good leader and has the ability to _______ the best in others.A．bring outB．take outC．make outD．wash out21、The reason ______ you gave for the absence of your assignment was ______ you missed the deadline after getting a long-queued nucleic acid test （核酸检测）.A．why; thatB．why; whichC．that; thatD．which; why22、It was a pleasure to learn to dance from Polly, who was a gentle and ______ young lady. A．braveB．dishonestC．forgetfulD．graceful23、Amanda hopes to live a simple life ______ she can just enjoy her activities rather than rush to meet the deadline. A．whereB．whenC．thatD．which24、Will it suit your _________ that we meet at 7.00 o’clock this evening? A．satisfactionB．appointmentC．delightD．convenience25、The world's oceans contain huge amounts of salt. In fact, if you____________ all the salt ____________ the oceans, you can use it to build a wall about 300 km wide and 1 km tall all around the Earth.A．take; apartB．dig; outC．move; inD．remove; from26、It was ________ I came across my best friend ________ I realized I had left the book at home that we hadattempted to finish together today.A．when; thatB．that; whenC．that; thatD．when;when27、Besides, it’s vital that you ________ your table manners.A．mindedB．mindC．to mindD．minds28、---Your suit ______! Why?---I got stuck in the rain.A．has ruinedB．had ruinedC．has been ruinedD．had been ruined29、You can only realize how hard this job is ________ you really experience it. A．unlessB．untilC．whenD．before30、All flights ________ because of the snowstorm, we decided to take the train.A．were canceledB．had been canceledC．having canceledD．having been canceled31、______ that all the ______ problems would be settled, John felt relaxed.A．Convinced; existingB．Convincing; existingC．Convinced; existedD．Convincing; existed32、—______ you interrupt now? Can’t you see I’m on the phone?—Sorry, sir, but it’s an emergency.A．CanB．ShouldC．MustD．Would33、His young sister is always curious ________ everything about physics and her dream is to be a physicist in the future.A．inB．withC．aboutD．of34、Regardless of many massive challenges, I ________ die ________ give up.A．preferred to; rather thanB．preferred; rather thanC．would; thanD．would to; rather than35、Not until very late that night ______ her house was ______ from the terrible flood.A．did she realize, under threatB．that she realized, under threatC．when she realized, in declineD．had she realized, in decline36、By 17:20, ______ was close to the closing time, all the fresh fruit had been sold. A．whenB．whichC．whatD．that37、Any potential triggering (触发) of atomic weapons would be ______ a disaster of immense scale. A．nothing less thanB．nothing better thanC．nothing more thanD．nothing worst than38、We’ve always regarded Dr. Smith as a man of integrity and high professional ________. A．interestB．attitudeC．competenceD．reputation39、I really think ________ impossible to finish the work in such a short time. A．itB．thisC．themD．that40、It’s strongly recommended that the machine ________ every year.A．repairB．to repairC．be repairedD．should repair41、The reason why I have to wash my clothes by hand is that my washing machine ______.A．is repairedB．is being repairedC．has been repairedD．was repaired42、________ the hospital, the region has a university, ________ was also built with government support. A．In addition to; whichB．In harmony with; thatC．On the basis of; whichD．As well as; that43、—Will you please sing for the sick at the city hospital to cheer them up?—_____.A．What about you?B．It's very kind of you.C．Certainly. I'll be glad to.D．I'm sorry to hear that.44、Artemisinin has become a vital part of the treatment for malaria, and is thought to save 100,000 lives a year in Africa alone.句子中谓语时态为现在完成时的是：A．has becomeB．is thoughtC．saveD．become45、—It was a wonderful National Day holiday trip. So, which city did you like better, Hangzhou or Wuxi?—______. There were good things and bad things about them.A．It’s hard to sayB．I didn’t get itC．You must be kiddingD．Couldn’t be better带答案高考英语单选题_010参考答案1、答案：B解析：考查动词短语词义辨析。
专题训练：电场中的图像问题
专题训练：电场中的图像问题一、单选题(共15小题,每小题5.0分,共75分)1.真空中有一半径为r0的带电金属球壳，通过其球心的一直线上各点的电势φ分布如图，r 表示该直线上某点到球心的距离，r1、r2分别是该直线上A、B两点离球心的距离．下列说法中正确的是()A．A点的电势低于B点的电势B．A点的电场强度方向由A指向BC．A点的电场强度小于B点的电场强度D．正电荷沿直线从A移到B的过程中，电场力做负功2.两带电量分别为＋q和－q的点电荷放在x轴上，相距为L，假设无穷远处电势为零，能正确反映两电荷连线上电势大小φ与x关系的是下图中的()A．B．C．D．3.两电荷量分别为q1和q2的点电荷放在x轴上的O、M两点，两点电荷连线上各点电势φ随x变化的关系如图所示，其中P、N两点的电势为零，NF段中Q点电势最高，则()A．P点的电场强度大小为零B．q1和q2为等量异种电荷C．NQ间场强方向沿x轴正方向D．将一负电荷从N点移到F点，电势能先减小后增大4.两电荷量分别为q1和q2的点电荷放在x轴上的A、B两点，两电荷连线上各点电势φ随x 变化的关系图线如图所示，其中P点电势最低，且AP>BP，则以下说法正确的是()A．P点的电场强度大小为零B．q1的电荷量小于q2的电荷量C．q1和q2可能是同种电荷，也可能是异种电荷D．负电荷从P点左侧移到P点右侧，电势能先减小后增大5.有一场强方向与x轴平行的静电场，电势φ随坐标x的变化的图线如图所示，如规定x轴正方向为场强的正方向，则该静电场的场强E随x变化的图线应是图中的哪一个？()A．B．C．D．6.电场强度方向与x轴平行的静电场，其电势妓x的分布如图所示，一质量为m、带电量为＋q的粒子(不计重力)，以初速度v0从O点(x＝0)沿经轴正方向进入电场．下列叙述正确的是()A．粒子从O点运动到x3点的过程中，在x2点速度最大B．粒子从x1点运动到x3点的过程中，电势能先减小后增大C．要使粒子能运动到x4处，粒子的初速度v0至少为2D．若v0＝2，则粒子在运动过程中的最大动能为3q07.真空中有一静电场，其在x轴正半轴的电势随x变化的关系如图所示，则根据图象可知（）A．R处的电场强度E＝0B．若试探电荷从x1处移到x2处，电场力不一定做正功C．x1处与x2处的电场强度方向相反D．该电场有可能是处在O点的正的点电荷激发产生的8.如图甲所示为电场中的一条电场线，在电场线上建立坐标轴，则坐标轴上O～x2间各点的电势分布如图乙所示，则()A．在O～x2间，场强先减小后增大B．在O～x2间，场强方向一定发生了变化C．若一负电荷从O点运动到x2点，电势能逐渐减小D．从O点静止释放一仅受电场力作用的正电荷，则该电荷在O～x2间一直做加速运动9.一静电场沿x坐标轴方向的电势分布如图所示，则()A．在x1～x2之间存在着沿x轴正方向的匀强电场B．在x1～x2之间存在着沿x轴正方向逐渐增强的电场C．在x1～x2之间沿x轴方向电场强度为零D．在x1～x2之间存在着沿x轴负方向的匀强电场10.空间有一沿x轴对称分布的电场，其电场强度E随x变化的图像如图所示．下列说法正确的是()A．O点的电势最低B．x2点的电势最高C．x1和－x1两点的电势相等D．x1和x3两点的电势相等11.有一沿x轴分布的电场，以＋x方向为电场正方向．其电场强度E随x变化的图象如图所示．下列说法正确的是()A．O点的电势最高B．x2点的电势最高C．正电荷从x1移动到x3电场力不做功D．x1和x3两点的电势相等12.光滑绝缘水平面上固定两个等量正电荷，它们连线的中垂线上有A、B、C三点，如图甲所示．一质量m＝1 kg的带正电小物块由A点静止释放，并以此时为计时起点，并沿光滑水平面经过B、C两点，其运动过程的v－t图象如图乙所示，其中图线在B点位置时斜率最大，则根据图线可以确定()A．A、B两点间的位移大小B．中垂线上B点电场强度的大小C．B、C两点间的电势差D．A、C两点间的电势能的变化大小13.如图甲所示，Q1、Q2为两个固定的点电荷，一带负电的试探电荷仅在电场力作用下以初速度v a沿两点电荷连线的中垂线从a点向上运动，其v－t图象如图乙所示，下列说法正确的是()A．两点电荷一定都带负电，但电量不一定相等B．两点电荷一定都带负电，且电量一定相等C．t1、t2两时刻试探电荷在同一位置D．t2时刻试探电荷的电势能最大14.如图在(0，y0)和(0，－y0)两位置分别固定一个电荷量为＋Q的点电荷．另一个带电量为＋q的点电荷从(－x0,0)位置以初速度v0沿x轴正方向运动．点电荷＋q从(－x0,0)到(x0,0)的过程中只受电场力作用，下列描述其加速度a或速度v与位置x的关系可能正确的是()A．B．C．D．15.如图甲所示，A、B是一条电场线上的两点，若在某点释放一初速度为零的电子，电子仅受电场力作用，从A点运动到B点，其速度随时间变化的规律如图乙所示，则() A．A点的场强大于B点B．电子在A点受到的电场力小于B点C．A点的电势高于B点D．电子在A点的电势能小于B点二、多选题(共11小题,每小题5.0分,共55分)16.在x轴上有两个点电荷q1、q2，其静电场的电势φ在x轴上分布如图所示．下列说法正确的有()A．q1和q2带有异种电荷B．x1处的电场强度为零C．负电荷从x1移到x2，电势能减小D．负电荷从x1移到x2，受到的电场力增大17.(多选)空间某区域有沿x轴方向分布的电场，其电势φ随x轴变化的规律如图所示．下列说法中正确的是()A．该区域的电场为匀强电场B．该区域的电场为非匀强电场C．该区域的电场方向沿x轴正方向D．该区域的电场方向沿x轴负方向18.(多选)真空中有两个点电荷，以两个点电荷中点O为坐标原点，以两个点电荷的连线为x 轴，过两个点电荷的中点且垂直x轴的直线为y轴建立直角坐标系，下面四幅图表示两个点电荷形成的电场中某物理量随坐标x或y变化的情况，下列说法中可能正确的是()A．可表示两等量异号电荷连线中垂线上电势随坐标y变化的情况B．可表示两等量同号电荷连线上场强随坐标x变体的情况C．可表示两等量同号电荷连线中垂线上场强随坐标y变化的情况D．可表示两等量异号电荷连线上电势随坐标x变化的情况19.(多选)如图所示，A、B为两个带等量正电的点电荷，O为A、B连线的中点．以O为坐标原点、垂直AB向右为正方向建立Ox轴．下列四幅图分别反映了在Ox轴上各点的电势φ和电场强度E随坐标x的变化关系，其中可能正确的是()A．B．C．D．20.(多选)某静电场中的一条电场线与x轴重合，其电势的变化规律如图所示．在O点由静止～x0区间内()释放一电子，电子仅受电场力的作用，则在－xA．该静电场是匀强电场B．该静电场是非匀强电场C．电子将沿x轴正方向运动，加速度逐渐减小D．电子将沿x轴正方向运动，加速度逐渐增大21.(多选)如图甲，某电场的一条电场线与Ox轴重合，取O点电势为零，Ox方向上各点电势φ随x变化的规律如图乙所示．若在O点由静止释放一电子，电子仅受电场力的作用，则() A．电子的加速度恒定B．电子将沿着Ox正方向运动C．电子的电势能将增大D．电子的加速度先逐渐减小后逐渐增大22.(多选)空间某一静电场的电势φ在x轴上分布如图所示，A、B、C、D是x轴上的四点，电场强度在x轴方向上的分量大小分别是E A、E B、E C、E D，则()A．E A<E BB．E C<E DC．A、D两点在x轴方向上的场强方向相反D．同一负点电荷在A点时的电势能小于在B点时的电势能23.(多选) 两个等量同种电荷固定于光滑水平面上，其连线的中垂线上有A、B、C三点，如图甲所示．一个电荷量为2×10－6C、质量为1 g的小物块从该水平面内的C点静止释放，其运动的v－t图象如图乙所示，其中B点处为整条图线切线斜率最大的位置(图中标出了该切线)．则下列说法正确的是()A．B为中垂线上电场强度最大的点，其电场强度E＝1×103V/mB．由C到A的过程中，物块的电势能先减小后变大C．由C到A的过程中，电势逐渐升高D．A、B两点电势差UAB＝－5×103V24.(多选)如图甲所示，Q1、Q2为两个被固定的点电荷，a、b是它们连线的延长线上的两点．现有一带负电的粒子只在电场力作用下以一定的初速度从a点开始经b点向远处运动，粒子经过a、b两点时的速度分别为v a、v b，其速度时间图象如图乙所示．下列说法正确的是() A．Q一定带正电B．Q1的电量一定小于Q2的电量C．b点的电场强度一定为零D．粒子由a点经b点向远处运动过程中，粒子的电势能先减小后增大。
初中七年级英语单选题专题训练100题(含答案)
初中七年级英语单选题专题训练100题含答案一、单项选择1．After having a three-day rest, my father is now feeling _____ to go to work. A．enough good B．enough well C．well enough D．good enough 2．—What’s your favorite color?—________ favorite color is ________.A．I; red B．My; blue C．I; banana D．My; math 3．Do they have a soccer ball? No, _____A．they aren’t B．they doesn’tC．they don’t D．they do4．We love animals ________ they are our friends.A．but B．so C．or D．because 5．There is________X-ray coming from the box.________amazing thing!A．an; What B．a; How C．an; What an D．a; How an 6．—________ Mary have straight hair ________ curly hair?—She has curly hair.A．Is; or B．Does; or C．Is; and D．Does; and 7．The firemen tried their best and never gave up, even lost their lives in Muli. We should learn from their ________.A．spirit B．kindness C．fairness 8．—Sorry, I’m late. There was too much traffic on my way here.—I don’t think it’s a good ________. You are always late for our date.A．idea B．excuse C．time 9．—Mother’s Day is coming. Here is a pair of jeans for you, Mum.— ______ beautiful blue jeans! Thank you, Amy.A．How a B．How C．What a D．What 10．Sydney Opera House was a _________ of Australia.A．house B．park C．symbol D．rock11．I have waited for an hour but he hasn’t come yet. ____ waste of time!.A．How B．How a C．What D．What a12．_________ useful information it is!A．How B．How a C．What D．What a 13．This week, the _______ seems to change every day: one day is hot; the next day is cold. A．time B．seasonC．weather D．way14．— Jim looks sad today. What’s wrong with him?— He ________ the math test yesterday and he cried for a long time.A．finished B．managed C．failed D．continued 15．—Does your brother like sports?—Yes, he does. He wants to be a ________ like Sun Yang.A．dancer B．teacher C．singer D．player 16．—Did you notice a girl in green come in?—No, I didn't. I ________ a book.A．had read B．have read C．will read D．was reading 17．下列字母含有相同元音音素的一组是________。
人教版一年级数学上册单选题专项专题训练
人教版一年级数学上册单选题专项专题训练1. 用两个完全一样的正方形可以拼成一个( )。
A .正方形B .长方形C .长方体2. 一本书14元，一枝笔6元。
书比笔贵（）元。
A .20B .8C .143. 东方红电器商店电视机销售情况统计表如下，从图中可知哪天销售的最少？（）星期一二三四五六日销售量（台）20 15 12 14 15 20 25A .星期二B .星期三C .星期四4. 比一比，最少的是（）。
A .B .C .5. 下列错误的是（）。
A .54＋4＝58B .63＋15＝68C .46＋32＝786. 4乘2写作（）。
A . 3×4B .4×2C .3×27. 8－5－2＝（）A . 2B .6C .1D .78. 6＋4=（）A .10B .11C .12D .139. 小林家养了26只白兔，养的灰兔比白兔少得多，灰兔可能有( )只。
A .7B .22C .4010. 11－6＋7＝（）A . 12B .8C .9D .1111. 计算56＋8，一般来说可以先算（）A .6＋8B .50＋8C .16＋812. 选出得数比50大的（）。
A .25＋13B .45＋12C .33＋1213. 军军和楚楚都有一些气球，军军比楚楚多7个气球，楚楚比军军少( )个气球。
A .6B .7C .无法确定14. 15－7＋4=（）A . 2B .6C .12D .415. 下图中，（）多？A .草莓B .香蕉16. 3＋3＋4＝（）。
A .7B .8C .9D .1017.A .小云B .小丽C .小华18. 小象跑在小牛的（）A .上B .下C .前D .后19. 10＋7=（）A . 7B .9C .17D .320. 8能分成2和（）。
A .7B .6C .5D .421.A .13B .10C .222. 图书馆有78本书，借走8本，还剩下（）本A .60B .70C .8023. 羊大概有（）只A .15只B .30只C .20只24. 小明：一班有48人，小雪：二班的人数比一班少一些，二班可能有多少人?（）A .50人B .15人C .46人25. 44＋3=（）A .46B .47C .4826. 下图表示（）。
中考化学鲁教版(五四学制) 专题训练--金属
2023年中考化学鲁教版（五四学制）专题训练--金属一、单选题1．下列化学方程式不正确的是 ①2222H OH +O 电解①322Fe+6HCl=2FeCl +3H ↑①2323CO+Fe O 2Fe+CO ↑高温①22H +CuO Cu+H O ∆①22Cu+ZnCl =CuCl +ZnA ．①①①①①B ．①①①C ．①①①D ．①①①①2．某兴趣小组在研究Mg -Al 合金、Fe -Al 合金、Zn -Fe 合金、Fe -Cu 合金时，发现其中一种合金7.5g 与足量的稀盐酸充分反应后产生了0.5g 气体，该合金可能是 A ．Mg -Al 合金 B ．Fe -Al 合金 C ．Zn -Fe 合金D ．Fe -Cu 合金3．根据金属活动性顺序Fe ＞Cu ＞Ag 判断，下列说法错误的是 A ．反应Cu+FeSO 4═Fe+CuSO 4可以发生 B ．反应Fe+2AgNO 3═2Ag+Fe （NO 3）2可以发生 C ．铜片放入硝酸银溶液中，颜色由无色变成蓝色 D ．铁丝插入硫酸铜溶液中，铁丝表面有红色物质析出4．现有a 、b 、c 三种金属，a 、b 分别与稀硫酸，c 的硝酸盐溶液作用的现象如表所示：根据表中所给的实验结果，判断这三种金属活动性有强到弱的顺序正确的是A ．c 、b 、aB ．a 、b 、cC ．b 、a 、cD ．a 、c 、b5．取一定量的Al 放入Cu(NO 3)2和AgNO 3的混合溶液中充分反应后过滤，得到固体和蓝色滤液，下列说法正确的是A ．固体中一定有Ag 与CuB ．滤液中的溶质可能是AgNO 3 Cu(NO 3)2 Al(NO 3)3C ．AgNO 3一定完全反应D ．Cu(NO 3)2 一定没有参加反应6．“中国高铁，世界第一”，高铁列车车体材料使用了含镍不锈钢，工业上火法炼镍的原理是：2C+NiO 高温2Ni+CO ↑，下列说法错误的是A ．反应中NiO 发生还原反应B ．气体产物中可能有COC ．该不锈钢中还含有铁和碳D ．该不锈钢合金的硬度小于纯铁7．下列排序正确的是 A ．利用金属的年代:Al Cu Fe由先到后B ．溶液的pH:24H SO NaCl NaOH由小到大C ．氮元素的化合价:233N NH HNO 由低到高D ．物质在水中的溶解性:()232CaCl CaCO Ca OH 由大到小8．下列实验目的通过对应实验操作能达到的是A ．AB ．BC ．CD ．D9．现有一包固体粉末，可能含有C 粉、NaCl 、NH 4HCO 3、CuSO 4、Fe 粉中的一种或几种。
专题训练之单选题(一)
复习选择题专练( )1.There a little oil in the bottle. A. are B. is C. aren’t D. am( )2.--In England, people eat a lot of beef. -- .We eat a lit of beef, too.A. So do theyB. So they doC. So we doD. So do we( )3.—Do you agree Jim ? A. with B. on C. to D. over( )4.What’s with you ? A. matter B. the wrong C. the matter D. the mater( )5.Would you like to sit the table the window? A. on…near B. at…byC. on…by D. near…by ( )6.Let’s ask the policeman. He know. A. can B. may C. will D. shall( )7.I bought an English book my way . A. in, home B. in, to home C. on, home D. on, to home ( )8.You seem about him. A. worried B. worrying C. worry D. to worried( )9.Both of the books are good.If you let me have one, is OK A. neither B. either C. both D. all. ( )10. Help yourself some fish. A. to B. to have C. have D. for( )11.I want to eat. A. something English B. English something C. English anythingD. Anything English( )12.May I your order now? A. take B. bring C. get D. took( )13. the end of the road, you’ll find a shop in front of you.A. On, theB. At, /C. In, /D. At, the( )14.The zoo is very . You’d better catch a bus. A. near B. far C. long D. short( )15. is the way the cinema? A. What, of B. Where, to C. Which, to D. How, of( )16.My home isn’t far from the school. It’s about .A. forty minutes’s walkB. forty minute’s walkC. forty minutes walkD. forty minutes’ walk ( )17. of his parents is at work. A. Neither B. All C. Both D. Some( )18.This one is not good, and that one is even . A. bad B. worse C. worst D. badly( )19.You go with us right now. A. need B. should C. would D. could( )20.We won’t go to the Great Wall if it tomorrow. A. snows B. snowedC. snow D. will snow ( )21.We must wash our hands we have meals. A. when B. before C. after D. because ( )22. “Stop and listen to me carefully.” Said the teacher. A. to talk B. talks C. talking D. talk ( )23.He the bus, sat down and bought a ticket. A. got in B. got out C. got on D. got off( )24.I’m sorry I can’t go fishing with you. I have a pain my right arm.A. inB. onC. with C. of( )25.The chicken smells . A. well B. badly C. hard D. good( )26.The farmers are busy vegetables. A. grow B. growing C. grew D. grows( )27.Don’t be late. You be there on time. A. must B. can C. may D. mustn’t( )28.Don’t worry. They always enjoys at the party. A. them B. their C. themselves D. theirs( )29.—Thank you for having us. We had a very good time today. —. Bye.A. No, thank youB. I’m afraid notC. You shouldn’t say thatD. It was my pleasure( )30.—May I smoke here?—.A.Yes, you mustB.Yes, you pleaseC.No,you needn’tD. No, you’d better not( )31.—Did the children go to the farm with the apple picking?—Yes, the first day they went to the farm and the second day went to the nearest farm.A. farB. fartherC. farthestD. farest( )32.—Can you see in the classroom? —No, I’m afraid not. Today’s a holiday. It’s Sunday.A. nobodyB. anybodyC. nothingD. something( )33. —Where’s Jim? —He went to Beijing last week. He be back until next month.A. didn’tB. won’tC. wasn’tD. doesn’t( )34. —Look! The woman in the lake is for help. She can’t swim.A. smilingB. laughingC. cryingD. saying( )35. —Is everything OK? —Yes, we want the meeting to start .A. in timeB. at timesC. on timeD. of time( )36.I can buy because I have no money. A. anything B. something C. nothing D. everything ( )37. —Where’s my football? —It must be in the room.A. anywhereB. somewhereC. any whereD. some where( )38.I feel thirsty. Please me something to drink. A. take B. bring C. carry D. help( )39.It’s a secret. We’d better tell her. A. not B. no C. don’t D. won’t( )40.The little boy is young look after himself. A. too, not to B. to, too C. too, to D. very, to( )41. —Mum, where’s my blue sweater? I can’t find it anywhere.—Don’t worry. You’ll find it somewhere.A. Soon or lateB. Sooner or laterC. Soon and lateD. Sooner and later( )42. —Is all the food there? —No, there’s nothing. The monkeys all the food.A. ate upB. ate outC. eat upD. eat out( )43. —Oh, the monkey have our picnic basket. —Quick! Let’s before they eat the food.A. take it awayB. get it backC. take away itD. get away it( )44. —Daddy, a dog, a dog is coming! —You are a big boy now. Don’t . TommyA. afraidB. worryC. be afraidD. be worried( )45. —How beautiful your school is! —Yes, our school is what it was three years ago!A. any moreB. not moreC. any longerD. no longer( )46.In the evening I told him story. A. my all B. the all C. whole my D. my whole( )47.She said she would go there. A. not…more B. not…any more C. no more D. not…longer( )48.We got up early, we didn’t catch the train. A. and B. so C. but D. then( )49.He the boy English for an hour every day.A. keep, readingB. kept, to readC. keeps, readingD. keeps, to read( )50.I the picture three days ago. A. finish drawing B. finished drawing C. finished draw( )51.The boy a face in class. All children . A. make, laugh B. makes, laughs C. made, laughed ( )52.Our country becomes . A. good and good B. well and well C. better and better ( )53.She was hungry and she stopped something. A. eating B. eats C. to eat D. having( )54.Don’t turn the radio, please. My father is now.A. on, asleepB. on, sleepC. off, sleepingD. off, slept( )55.How did Ling Feng make the baby crying? A. stop B. to stopping C. stopping D. to stop ( )56.How old is this little baby? . A. It is only one little month oldB. She is only one monthsC. He is only one month oldD. It’s only one month( )57.Igot up late. I go to school in a hurry. A. have B. have to C. has D. had to( )58.He his pen at home. He wanted to borrow one. A. leave B. left C. forgets D. forget ( )59.You’d better your coat you. It’s cold there.A. bring…forB. take…forC. take… withD. bring… with( )60.I told him run in the street. It was dangerous. A. doesn’t B. not C. didn’t D. not to( )61.The film is interesting, I don’t like it. A. or B. but C. and D. so( )62.After that he sang . A. not any more B. not more C. no more D. no again( )63.Are you the 100-meter race? A. for B. in C. at D. to( )64.Wu Ping dropped his stick. He stopped it. A. get B. to get C. getting D. gets( )65.Who won the race? A. girl’s 100 meter B. girl’s 100-meters C. girls’ 100- meter( )66.It was difficult the boy’s relay. A. win B. winning C. to win D. won( )67.—Who taught to write? —He learnt all by .A. him, him B. his, himself C. his, him D. him, himself( )68.He is tall I. A. a little, than B. more, than C. as, as D. so, as( )69. she swim when she was nine years old? A. Can B. Could C. Can’t D. If( )70.He two balls from the top of the building. A. jumped B. dropped C. passed D. fell( )71.He and his parents teachers in the same middle school. A. all are B. are all C. both are D. are both( )72.He tries to study hard and catch up his classmates. A. to B. on C. in D. with ( )73.He was very tired but he went on machines.A. mendingB. mendC. to mend D. mended ( )74.They passed the sticks the next runners the same time.A. on, to, inB. on, in, toC. on, to, atD. in, to, at( )75.Why didn’t Mr. Fat enjoy ?Can you the answer?A. himself, find outB. himself, findC. him, look forD. very much, find out( )76. —Would you please look out of the window? —Sorry, I do it again.A. don’t…won’tB. not…won’tC. not to…mustn’tD. won’t…can’t( )77.He found very difficult to learn English . A. it, good B. that, good C. it, well D. that, well ( )78.What you from seven to nine this morning? A. did, to B. do, do C. are, doing D. were, doing( )79. —Why was Tom’s mother angry Tom? —Because he couldn’t pass the math exam.A. withB. atC. toD. for( )80. —Did she sing well? —Yes, we often heard her in the next room.A. singB. to singC. sangD. sings( )81. —English is very important now. —You must try English well.A. learningB. to learnC. learnD. learned( )82.They supper when I on the door. A. are having…are knockingB. had…were knockingC. are going to have…knockedD. were having…knocked( )83.Brian is good at Chinese. He several hours books about it every day.A. spend…readingB. spent…readC. spends…readingD. spends… to read( )84. elephant is much heavier than sheep. A. A…a B. An, a C. The, the D. /, /( )85.Do you remember name of cinema? A. the…the B. the…a C. a …the D. /, /( )86. —Do you know what interested ? —I’m not sure.A. is he…inB. he is…withC. is he…withD. he is…in( )87. —What did you buy your mother for Mother’s Day? —I bought her a pair of shoes.A. forB. toC. withD. /( )88.Bob is much younger than Mike. But he is as as Mike. A. tall B. taller C. much taller ( )89.Can you make them to get on each other?A. decide…with wellB. to decide…well withC. decides…with wellD. decide…well with( )90. —I’m sorry to trouble you. A. It doesn’t matter B. All right C. No. D. You’re right( )91. —Are you interested in maths or history, Mike? —. I prefer physics.A. BothB. EitherC. NeitherD. Nothing( )92.We TV at midnight when our uncle came in.A. are watchingB. watchedC. were watchingD. watch( )93.Iwant to know . A. why doesn’t he give up smoking B. why does he smoke a lot C. why he doesn’t give up smoking D. why does he give up smoking( )94.Would you please drop your shoes on the floor during the night?A. not toB. notC. don’tD. never to( )95.I’m hungry, mum. But there is food in the fridge. A. a few B. a little C. little D. any( )96. —May I watch TV before I finish the letter? —No, you .A. write, don’tB. wrote, needn’tC. writing, won’tD. writing, mustn’t( )97. —Which film are you going to see?—There’s nothing good at the moment. .Would you like to go to a concert?A. Let’ do something elseB. Let’s go to buy the ticketsC. Let’s go there right awayD. Let’s go to buy some DVDs( )98. —How long does it take you to go to your school? —About fifteen walk.A. minuteB. minutesC. minute’sD. minutes’( )99.Betty Smith is not married yet, I think, for people call her .A. Mrs. SmithB. Miss BettyC. Mr. SmithD. Miss Smith( )100. —How are you this morning? —. A. Yes, I’m fine. B. It’s fine this morning.C. How are you, Tom.D. Not very well. I have a pain in my head.( )101—When is Bob’s birthday?. —November 21st, the same day .A. to youB. as yoursC. with mineD. like me( )102.The teacher thought he would try to make the students harder.A. workB. workingC. workedD. to work( )103.Which of these inventions is useful of all? A. the second B. the second most C. much more( )104.At the end of the last lap, Lily and Susan were .A. neck to neckB. neck for neckC. neck and neckD. neck by neck( )105. we’re having today!A. What a fine weatherB. How fine the weatherC. How fine weatherD. What fine weather ( )106. —How carefully you are writing! —.A. Don’t mention itB. Not very beautifulC. It’s kind of you to say soD. That’s not true( )107. —Don’t read in the sun. —No, I . A. mustn’t B. don’t C. won’t D. can’t( )108.Will you please it yourself. A. don’t do B. not to do C. not do D. don’t to do( )109.I have to stop and have a rest five minutes. A. every B. each C. other D. all( )110.Wait for a moment, I’ll give you to eat.A. something differentB. nothing differentC. different somethingD. different nothing( )111. Yesterday I saw a man on the road. A. lay B. was laying C. lying D. lie( )112.He hurried to get the box. A. of B. off C. at D. on( )113. —What happened to Mary’s brother? —He off when he a motor bike.A. was, falling, rodeB. fell, was ridingC. falls, is ridingD. was falling, was riding( )114.It was very kind you my son to the hospital.A. of, to takeB. for, to takeC. of, bringingD. for, to bring( )115.The students saw the accident near the gate yesterday.A. to happenB. happenedC. happensD. happen( )116.He looks today than yesterday. A. more tired B. tireder C. most tired D. much tired( )117. both enjoy fishing on Sunday. A. Wang B. Wangs C. The Wang D. The Wangs( )118.She went to the hospital as quickly as she . A. could B. walked C. can D. did( )119.You’d better the book.. bad book it is!A. not read, HowB. not to read, What aC. not read, WhatD. not read, What a( )120. a pair of glasses the nose the teacher came.A. With, onB. Wearing, overC. Having, inD. Putting, on参考答案：1-5 BDACB 6-10 BCABA11-15 AABBC 16-20 DABBA21-25 BCCAD 26-30 BACDD31-35 CBBCC 36-40 CBBAC41-45 BABCD 46-50 DCCCB51-55 CCCAA 56-60 CDBCD61-65 BCBBC 66-70 CDCBB71-75 BDACA 76-80 BCDAA81-85 BDCBA 86-90 DAADA91-95 CCCBC 96-100 DADDD101-105 BABCD 106-110 CCCAA111-115 CBBAD 116-120 ADADA。
小学英语四年级名词单复数专题训练
小学英语四年级专题训练-名词单复数专项练习（1）一、单选题1. —How many ________ can you see? —I can see one. ( )A. sheepsB. foxC. horses2. Look! Your eraser is between ________. ( )A. the boxB. the book or the boxC. the boxes4. Look at my new _________. They are purple. ( )A. trousersB. sockC. shoe5. —Do you like this ________? —Yes, I like ________. ( )A. dog; dogsB. dog; dogC. dogs; dogs6. —How many ________ do you have? —________. It's green.A. clocks; Only oneB. clocks; ThreeC. clock; Only one7. The girl’s _______ is small, but her _______ are big.A. ears; eyesB. nose; mouthC. mouth; ears8. A: _______ are the _______?B: They are in the fridge.A. Where; shoesB. What; applesC. Where; eggs9. There is a book about ________.A. three pigB. three pigsC. three chicken10. My friend has ________.A. glassesB. glassC. a glasses11. My friend is a boy. He has ___________ and ___________.A. big eye; short hairB. big eyes; short hairC. big eyes; short hairs12. —How many toy _______ do you have? —Twelve.)A. pandaB. some pandasC. pandas13. I’d like some _____ and two _____.A. milk; eggB. milks; eggC. milk; eggsD. milks; eggs14. My__________ are under the table. ( )A. pencilB. notebookC. storybooks15. Lucy has some books and __________ in her bag.A. candiesB. candysC. candy16. —Look at ______. —They’re very nice.A. this appleB. the applesC. the apple juice17. —How many _______ do you have?—I have one _______.A. ball; ballB. balls; ballsC. balls; ball18. I like _______. But I don’t like _______.A. cat; catB. cats; this catC. cats; cats19. We saw lots of ________.A. mountainB. a mountainC. mountains20. —Where was Amy?—She was between the two ________.A. deskB. chairC. cars21. —How many ___________ do you have?—Only one. ___________ green.A. mangos; They’reB. mang oes; They’reC. mangoes; It’s22. This is a tiger. I like ___________.A. a tigerB. tigerC. tigers23. Tom's sister has two big ________ and short ________.A. ears; tailB. ears; hairC. ear; nose24. Do you like this ________?A. a toy dogB. toy dogC. toy dogs25. —How many _______ do you have?—Ten.A. applesB. appleC. an apple26. —Do you have _______?—Yes, I do.A. some grapesB. any grapesC. grape27. I like _______. But I don’t like this _______.A. cats; catB. cats; catsC. cat; cat28. —Do you like _________? —Yes, I do.A. a lionB. lionsC. lion29. —How many hens can you see? —________.A. A hens.B. Two hen.C. Three hens.30. —Can you see any _______ near the house?—No, I can’t.A. beeB. sheepC. goat31. How many ________ can you see?A. womanB. womenC. womans32. We have different _________ of shoes.A. kindB. kindsC. the kind33. Gao Wei and Peter are good ________.A. friendB. friendsC. a friend34. I like red dresses and white ________.A. shoesB. TshirtC. raincoat35. I want a blue ________.A. shortsB. shoesC. jacket36. Look at those ________. They are nice.A. capB. shoesC. dress37. —May I have ________ ? —Yes. Here you are.A. a bookmarkB. two bookmarkC. bookmark38. These are my new ________.A. sockB. socksC. coat39. I brush my ________.A. toothB. teethC. toothes40. Here’s some _______ _______ you.A. eggs; toB. egg; forC. milk; forD. cakes; to41. —How many _______ would you like? —_______, please.A. mangoes; Thirty yuanB. fruit; ThirteenC. milk; Thirteen yuan42. How many ______ do you have?A. math booksB. math bookC. a math book43. They are Kim’s _______.A. shortsB. scarfC. shirt44. They are his ________.A. parentB. parentsC. the parent45. There are three ________ in the box.A. staresB. starsC. star46. —_______ is on the table?—There are five _______ and carrots.A. Where; potatoesB. What; potatoesC. What; potatos47. She has a pair of _______.A. trousersB. shirtC. blouse二、用单词正确形式填空1. How many ________ (dress) are there in your room?2. Look at those _____ (man). They’re running fast.3. These _________ (storybook) are my friend's.4. How many ________ (sticker) do you have?5. I want to buy a pair of _____ (shoe).6. —Do you like ________ (lion)? —No, I ________ (do).7. I like ________ (panda).8. These _____ (lion) are cute.9. We have pigs and _______________ on the farm. (sheep)10. I have chicken and _______________ for lunch.(soup)11. My _______________ likes meat very much. (aunt)12. Here are _____ (picture) of our fete.三、选词/短语填空1. —Do you like ________ (zebra / zebras)? —No, I don’t.2. —How many ________ (robots / robot) do you have? —I have four.3. A: Do you have any bananas?B: No, I don’t. I have some _____ (milk / grape).4. —Do you have any _____ (mango / mangoes) in the basket? —No, I don’t.5. —What would you like? —I’d like a ________ (cake / noodles).6. —Do you like that ________ (dog / dogs)? —Yes, I do.7. —How many _____ (pear / pears) trees can you see? —Seven.8. The _____ (man / woman / women) make machines in the factory.9. A maths book and twenty _________ (notebook / notebooks).10. Do you like ___________ (horse/horses)?11. Would you like two ___________ (glass/glasses) of milk?12. How many ________ (photo / knives) can you see?13. I'd like some ________ (bread / noodle), please.14. How many _____ (pens / pen) do you have?15. Do you like _____ (grapes / grape)?16. They have five ________ (sandwich / sandwiches).17. Look at this robot. His ________ (mouth / eyes) are big.四、根据中文完成句子1. A: What would you like? B: I’d like a glass of ___________(果汁).2. A: What colour are your ________(袜子)? B: They are white.3. A: Do you like ________(马)? B: No, I don’t. I like pandas. They’re cute and fat.4. —What about some ___________? (鱼) —No, some ___________(米饭) , please.5. The _________ (窗户) is so beautiful(漂亮的).6. —How many________(橘子)can you see?—Two.五、选出错误选项并改正1. I'd like some vegetable. __________2. I have two bedroom. __________3. I’d like some beefs and noodles. __________4. How many month are there in a year? __________5. There is one dogs in my house. __________6. There are four season in a year. __________六、改写句子1. There are two cats. (改为单数句)There _____________ a _____________.2. That mango is nice and sweet. (改为复数句)___________ ___________ are nice and sweet.3. These are some big apples. (改为单数句)_____________ is _____________ big apple.4. This is a sweater. (改为复数)_____________ _____________ _____________.小学英语四年级专题训练-名词单复数专项练习（1）一、单选题1. They’re new ________.A. dressB. trousersC. cap2. These are ________ of my family.A. photosB. photoC. photoes3. She wants to buy some ______.A. tomatoB. tomatosC. tomatoes4. Look at the ________. They’re playing chess.A. manB. menC. boy5. They read _______ in the morning.A. bookB. a bookC. an book6. The ________ of the dog are sharp.A. toothB. toothsC. teeth7. There are two ________ between the big trees.A. menB. manC. mans8. I have to make some _______.A. breadsB. a breadC. bread9. —How many ________ do you have? —Five.A. pencilsB. a pencilC. pencil10. I like ________. I have an apple ________.A. pies; piesB. pies; pieC. pie; pies11. —How many ______ do you have?—Thirteen.A. toy carsB. toys carsC. toy car12. —Do you like ______?—Yes, I like it very much.A. peachesB. a peachC. that peach13. —Do you like ______?—Yes, I do. And I like this cute ______ very much.A. cats; catsB. cats; catC. cat; cat14. Cats, dogs and tigers are ______.A. animalB. fruitC. animals15. —I don’t like monkeys. What about you? —I don’t like _______.A. monkeys tooB. monkey eitherC. monkeys either16. Jim and his friend have eight ________.A. red toyB. yellow pensC. pears salads17. I see some ________ on the grass.A. cowB. tigerC. sheepD. bear18. How many ____________ do you have？A. picturesB. pictureC. potato19. Can you see any __________ on the desk?A. cowB. cupC. cups20. —Can you see any __________? —Yes, I can. __________ are black and white.A. bird; ItB. birds; TheyC. birds; He21. —What's in it? —Some __________.A. bunB. eggsC. apple22. I have a________. I like _________.A. doll, dollB. dolls, dollC. doll, dolls23. I like this ________. Do you like ________?A. monkey; itB. monkey; monkeyC. monkeys; it24. I don’t have ________.A. some grapesB. any grapesC. any grape25. Do you want some ______?A. dumplingB. noodlesC. egg26. Look at these toy animals, ______.A. boy and girlsB. boys and girlsC. boys and girl27. There are four _______ in a year.A. seasonesB. seasonC. seasons28. There are __________ in a red schoolbag.A. two green bookB. two green booksC. one green book29. How many _________ are there?A. a windowB. windowsC. window30. There are (有) five __________.A. shirtB. shirtesC. shirts31. —Do you like _______?—No, I don’t. But I like lions.A. tigerB. lionC. tigers32. How many ________ do you have?A. boxB. boxsC. boxes33. There are many _______in the classroom.A. childB. childrenC. childs34. How many ________ are there in your bag?A. pensB. penC. book35. There are five ________ in the box.A. toyB. toysC. a toy36. There are many ________ at the bus stop.A. taxiB. carC. buses37. —How much is it? —___________.A. It’s thirty five yuan.B. Thirtyfive yuans.C. Thirty five.38. Can you take a _______ of me?A. picturesB. pictureC. photos39. Where are the ________?A. trousersB. shirtC. candy40. There are three ________ in the photo.A. sheepB. chickensC. A and B41. Can I have some _______?A. ricesB. riceC. dumpling42. How many ________ and ________ are there in the picture?A. boy; girlB. boys; girlsC. boys; girlD. boy; girls43. Do you like ________?A. bananaB. watermelonC. kiwifruit44. —What's this in English? —It's __________.A. an appleB. carrotsC. cucumbers二、根据中文完成句子1. They are Ann’s g_________(眼镜).2. It’s Uncle Booky’s w_________(手表).3. A: Do you have _________ (香蕉)? B: Yes, I do. Here you are.三、用单词正确形式填空1. How many toy ________ (car) do you have?2. How many ________ (cap) are there?3. How many _____ (toy) are there in your room?4. I like ___________ (toy) ___________ (monkey). What about you?5. How many black __________ (box) do you have, Helen?6. We fly ____________(kite) on Saturday.7. How many ______ (animal) can you name?8. Would you like a __________. (pie)9. What are the ____________(man) doing?10. These __________ (cake) are nice!11. I’d like some ________ (fish), please.12. There are three ______ (kind) of pens in my shop.13. Look at those toy _____ (elephant).15. I like ______. (elephant)16. —Do you like ______ (horse)? —No, I __________. (do)17. His ________ (hair / hairs) is short.四、选词/短语填空1. —Do you like _________ (pig / pigs)? —No, I don’t. I like cows.2. There are two__________ (way / ways) to the supermarket.3. I like _________ (robot; robots). Look! This _________(robot; robots) is cool.4. Do you like _________ (yellow / yellows)?5. He has big _________ (eyes / eye).6. —Do you like _________ (cake / cakes)? —Yes, I do. I _________ (have / like) a cake here.五、选出错误选项并改正1. I’d like some rices, please.______________2. These fireman are busy. ______________3. There are many computer.______________4. There is sheep in the photo. ______________5. I want to buy some potatos. ______________6. She draws a pictures for her story. ______________六、将下列单词写入正确的组内。
2022年高考数学核心考点专题训练专题1 集合(含解析)
2022年高考数学核心考点专题训练专题1集合一、单选题（本大题共12小题，共60.0分）1.若A、B是全集I的真子集，则下列四个命题：①A∩B=A； ②A∪B=A; ③A∩(∁I B)=⌀; ④A∩B=I⑤x∈B是x∈A的必要不充分条件.其中与命题A⊆B等价的有( )A.1个B.2个C.3个D.4个2.已知非空集合A，B满足以下两个条件：(1)A∪B={1,2，3，4}3，A∩B=⌀；(2)A的元素个数不是A中的元素，B的元素个数不是B中的元素.则有序集合对A,B的个数为()A.1B.2C.3D.43.已知集合M，P满足M∪P=M，则下列关系中：①M=P；②M⫌P；③M∩P=P；④P⊆M.一定正确的是()A.①②B.③④C.③D.④4.有下列命题：①mx2+2x−1=0是一元二次方程；②二次函数y=ax2+2x−1与x轴至少有一个交点；③互相包含的两个集合相等；④空集是任何集合的真子集．真命题有()A.1个B.2个C.3个D.4个5.对于任意两个数x，y(x,y∈N∗)，定义某种运算“◎”如下：①当或，时，x◎y=x+y；②当，时，x◎y=xy则集合A= {(x,y)|x◎y=10}的子集个数是()A.214个B.213个C.211个D.27个6.已知集合A={x|−2<x<3}，B={x|m<x<m+9}.若A∩B≠⌀，则实数m的取值范围为( )A.{m|m<3}B.{m|m⩾−11}C.{m|−11⩽m⩽3}D.{m|−11<m<3}7.已知集合A={x|−2⩽x⩽5}，B={x|m+1⩽x⩽2m−1}.若B⊆A，则实数m的取值范围为( )A.m⩾3B.2⩽m⩽3C.m⩾2D.m⩽38.设集合S，T中至少有两个元素，且S，T满足：①对任意x,y∈S，若x≠y，则x+y∈T②对任意x,y∈T，若x≠y，则x−y∈S，下列说法正确的是()A.若S有2个元素，则S∪T有4个元素B.若S有2个元素，则S∪T有3个元素C.存在3个元素的集合S，满足S∪T有5个元素D.存在3个元素的集合S，满足S∪T有4个元素9.已知集合A=x∈R≤1，B=x∈−2a x−a2−1<0，若∁R A∩B=⌀，则实数a的A.1,+∞B.0,+∞C.0,+∞D.1,+∞10.设集合M={x|x2−x>0}.N={x|1x<1}，则( )A.M⊊NB.N⊊MC.M=ND.M∪N=R11.若集合A=x x−3x+1≥0，B=x ax+1≤0，若B⊆A，则实数a的取值范围是()A.−13,1B.−13,1C.−∞,−1⋃0,+∞D.−13,0⋃0,112.设集合S={−20,21，5，−11，−15，30，a}，我们用f(S)表示集合S的所有元素之和，用g(S)表示集合S的所有元素之积，例如：若A={2}，则f(A)=g(A)=2；若B={2,3}，则f(B)=2+3，g(B)= 2×3.那么下列说法正确的是()A.若a=0，对S的所有非空子集A i，f(A i)的和为320B.若a=0，对S的所有非空子集B i，f(B i)的和为−640C.若a=−1，对S的所有非空子集C i，g(C i)的和为−1D.若a=−1，对S的所有非空子集D i，g(D i)的和为0二、单空题（本大题共4小题，共20.0分）13.已知集合A={x|x2−6x+8=0}，B={x|mx−4=0}，且B∩A=B，则实数m所取到的值构成的集合C=，则A∪C=．14.设集合A={0,3}，B={m+2,m2+2}，若A∩B={3}，则集合A∪B的子集的个数为．15.已知集合M={(x,y)|y=f(x)}，若对于任意(x1,y1)∈M，存在(x2,y2)∈M，使得x1x2+y1y2=0成立，则称集合是“好集合”，给出下列4个集合：①M={(x,y)|y=1x}；②M={(x,y)|y=e x−2}；③M={(x,y)|y=cosx}；④M={(x,y)|y=lnx}.其中为“好集合”的序号是______．16.已知集合{a,b，c}={0，1，2}，有下列三个关系①a≠2；②b=2；③c≠0，若三个关系中有且只有一个正确的，则a+2b+3c=____________．专题1集合一、单选题（本大题共12小题，共60.0分）17.若A、B是全集I的真子集，则下列四个命题：①A∩B=A； ②A∪B=A; ③A∩(∁I B)=⌀; ④A∩B=I⑤x∈B是x∈A的必要不充分条件.其中与命题A⊆B等价的有( )A.1个B.2个C.3个D.4个【答案】B【解析】解：由A⊆B得Venn图，①A∩B=A⇔A⊆B;②A∪B=A⇔B⊆A;③A∩∁I B=⌀⇔A⊆B;④A∩B=IA⊆I B⊆I⇔A=B=I⇒A⊆B,但A⊆B不一定能得出A=B=I，故A∩B=I与A⊆B不等价;⑤x∈B是x∈A的必要不充分条件，则A⊆B，但A⊆B不一定能得x∈B是x∈A的必要不充分条件，所以不等价．故和命题A⊆B等价的有①③，故选B．18.已知非空集合A，B满足以下两个条件：(1)A∪B={1,2，3，4}3，A∩B=⌀；(2)A的元素个数不是A中的元素，B的元素个数不是B中的元素.则有序集合对A,B的个数为()A.1B.2C.3D.4【答案】B【解析】若集合A中只有1个元素，则集合B中有3个元素，则1∉A，3∉B，即3∈A，1∈B，此时有1对;同理，若集合B只有1个元素，则集合A中有3个元素，有1对;若集合A中有2个元素，则集合B中有2个元素，2∉A，2∉B，不满足条件．所以满足条件的有序集合对(A,B)的个数为1+1=2，故选B．19.已知集合M，P满足M∪P=M，则下列关系中：①M=P；②M⫌P；③M∩P=P；④P⊆M.一定正确的是()A.①②B.③④C.③D.④【答案】B已知集合M，P满足M∪P=M，则P⊆M，故④正确，①错误，②错误；由P⊆M可得M∩P=P，故③正确，故选B20.有下列命题：①mx2+2x−1=0是一元二次方程；②二次函数y=ax2+2x−1与x轴至少有一个交点；③互相包含的两个集合相等；④空集是任何集合的真子集．真命题有()A.1个B.2个C.3个D.4个【答案】A【解析】①当m=0时，方程是一元一次方程，错误；②方程ax2+2x−1=0(a≠0)的判别式Δ=4+4a，其值不一定大于或等于0，所以与x轴至少有一个交点不能确定，错误；③正确；④空集不是空集的真子集，错误.故选A．21.对于任意两个数x，y(x,y∈N∗)，定义某种运算“◎”如下：①当或，时，x◎y=x+y；②当，时，x◎y=xy则集合A= {(x,y)|x◎y=10}的子集个数是()A.214个B.213个C.211个D.27个【答案】C【解析】按照题意，将集合A中元素逐一列举出来如下：A={(10, 1), (2, 5), (1, 9), (9, 1), (2, 8), (8, 2), (3, 7), (7, 3), (4, 6),(6, 4), (5, 5)}，故集合A中共有11个元素，所以集合A的子集个数为211．故选C．22.已知集合A={x|−2<x<3}，B={x|m<x<m+9}.若A∩B≠⌀，则实数m的取值范围为( )A.{m|m<3}B.{m|m⩾−11}C.{m|−11⩽m⩽3}D.{m|−11<m<3}【答案】D【解析】若A∩B=⌀，利用下图的数轴可得m+9⩽−2或m⩾3，∴m⩽−11或m⩾3.∴满足A∩B≠⌀的实数m的取值范围为{m|−11<m<3}．故选D．23.已知集合A={x|−2⩽x⩽5}，B={x|m+1⩽x⩽2m−1}.若B⊆A，则实数m的取值范围为( )A.m⩾3B.2⩽m⩽3C.m⩾2D.m⩽3【答案】D【解析】A={x|−2⩽x⩽5}，B={x|m+1⩽x⩽2m−1}，而B⊆A，(1)当B=⌀时，满足B⊆A，此时m+1>2m−1，解得m<2；(2)当B≠⌀时，B⊆A，则计算得出2≤m≤3．综上，m≤3．故选D．24.设集合S，T中至少有两个元素，且S，T满足：①对任意x,y∈S，若x≠y，则x+y∈T②对任意x,y∈T，若x≠y，则x−y∈S，下列说法正确的是()A.若S有2个元素，则S∪T有4个元素B.若S有2个元素，则S∪T有3个元素C.存在3个元素的集合S，满足S∪T有5个元素D.存在3个元素的集合S，满足S∪T有4个元素【答案】B【解析】若S有2个元素，不妨设S={a,b}，由 ②知集合S中的两个元素必为相反数，故可设S={a,−a};由 ①得0∈T，由于集合T中至少有两个元素，故至少还有另外一个元素m∈T，当集合T有2个元素时，由 ②得：−m∈S，则m=±a，T={0,−a}或T={0,a}，当集合T有多于2个元素时，不妨设T={0,m，n}，由 ②得：m，n，−m，−n，m−n，n−m∈S，由于m，n≠0，所以m≠m−n，n≠n−m，又m≠n，故集合S中至少有3个元素，矛盾，综上，S∪T={0,a，−a}，故B正确；若S有3个元素，不妨设S={a,b，c}，其中a<b<c，则{a+b,b+c,c+a}⊆T，所以c−a，c−b，b−a，a−c，b−c，a−b∈S，集合S中至少两个不同正数，两个不同负数，即集合S中至少有4个元素，矛盾，排除C，D．故选B．25.已知集合A=x∈R≤1，B=x∈−2a x−a2−1<0，若∁R A∩B=⌀，则实数a的A.1,+∞B.0,+∞C.0,+∞D.1,+∞【答案】B【解析】∵集合A={x∈R|12x+1≤1}={x|−2x2x+1≤0}={x|x<−12或x≥0}，B={x∈R|(x−2a)(x−a2−1)<0}，∵2a≤a2+1，∴当2a=a2+1时，a=1，B=⌀，满足题意；当2a<a2+1时，a≠1，B={x|2a<x<a2+1}，∁R A={x|−12≤x<0}，∴a2+1≤−12或2a≥0，a≠1，解得a≥0，且a≠1，综上，a≥0，即实数a的取值范围是[0,+∞)．故选：B．26.设集合M={x|x2−x>0}.N={x|1x<1}，则( )A.M⊊NB.N⊊MC.M=ND.M∪N=R【答案】C【解析】解：解x2−x>0得，x<0或x>1；解1x<1得，x>1，或x<0；∴M=N．故选：C．27.若集合A=x x−3x+1≥0，B=x ax+1≤0，若B⊆A，则实数a的取值范围是()A.−13,1B.−13,1C.−∞,−1⋃0,+∞D.−13,0⋃0,1【答案】A【解析】因为x−3x+1≥0，所以x+1≠0(x−3)(x+1)≥0，所以x<−1或x≥3，所以A={x|x<−1或x≥3}，当a=0时，1≤0不成立，所以B=⌀，所以B⊆A满足，当a>0时，因为ax+1≤0，所以x≤−1a，又因为B⊆A，所以−1a<−1，所以0<a<1，当a<0时，因为ax+1≤0，所以x≥−1a，又因为B⊆A，所以−1a≥3，所以−13≤a<0综上可知：a∈[−13,1)．故选：A28.设集合S={−20,21，5，−11，−15，30，a}，我们用f(S)表示集合S的所有元素之和，用g(S)表示集合S的所有元素之积，例如：若A={2}，则f(A)=g(A)=2；若B={2,3}，则f(B)=2+3，g(B)= 2×3.那么下列说法正确的是()A.若a=0，对S的所有非空子集A i，f(A i)的和为320B.若a=0，对S的所有非空子集B i，f(B i)的和为−640C.若a=−1，对S的所有非空子集C i，g(C i)的和为−1D.若a=−1，对S的所有非空子集D i，g(D i)的和为0【答案】C【解析】由于S={−20,21，5，−11，−15，30，a}中的所有元素的和为a，则在S的所有非空子集中，对任意x∈S，含有x的非空子集的个数为26，从而A⊂S f (A)=26⋅A⊂S x =a⋅26．从而当a=0时，A⊂S f (A)=0，故选项A，B均错误．当a=−1时，S={−20,21，5，−11，−15，30，−1}，对于S中的任意子集A，若−1∈A，则将元素−1从集合A中删除得集合B=A={−1}，则g(A)=−g(B);若−1∉A，则将元素−1添加到集合A中得集合B=A∪{−1}，则g(A)=−g(B).由此A⊂S g (A)=g({−1))=−1,因此C选项正确．故选C．二、单空题（本大题共4小题，共20.0分）29.已知集合A={x|x2−6x+8=0}，B={x|mx−4=0}，且B∩A=B，则实数m所取到的值构成的集合C=，则A∪C=．【答案】{0,1，2}；{0,1，2，4}．【解析】A={x|x2−6x+8=0}={2,4}，∵B∩A=B，∴B⊆A，当m=0时，B=⌀，满足条件，B⊆A，当m≠0时，B={4m}，若满足条件，B⊆A，则4m=2或4m=4，即m=2或m=1，综上实数m的值构成的集合C={0,1，2}；∵A={2,4}，C={0,1，2}，则A∪C={0,1，2，4}．故答案为：{0,1，2}；{0,1，2，4}．30.设集合A={0,3}，B={m+2,m2+2}，若A∩B={3}，则集合A∪B的子集的个数为．【答案】8【解析】因为集合A={0,3}，B={m+2,m2+2}，且A∩B={3}，所以3∈B，所以m+2=3或m2+2=3，解得m=1或m=−1，当m=1时，此时B={3,3}，不满足集合中元素的互异性，故舍之，当m=−1时，B={1,3}，满足题意，此时A∪B={0,1,3}，所以集合A∪B的子集的个数为23=8．故答案为8．31.已知集合M={(x,y)|y=f(x)}，若对于任意(x1,y1)∈M，存在(x2,y2)∈M，使得x1x2+y1y2=0成立，则称集合是“好集合”，给出下列4个集合：①M={(x,y)|y=1x}；②M={(x,y)|y=e x−2}；③M={(x,y)|y=cosx}；④M={(x,y)|y=lnx}.其中为“好集合”的序号是______．【答案】②③【解析】对于①，注意到x1x2+1x1x2=0无实数解，因此①不是“好集合”；对于②，如下左图，注意到过原点任意作一条直线与曲线y=e x−2相交，过原点与该直线垂直的直线必与曲线y=e x−2相交，因此②是“好集合”；对于③，如下中图，注意到过原点任意作一条直线与曲线y=cosx相交，过原点与该直线垂直的直线必与曲线y=cosx相交，因此③是“好集合”；对于④，如下右图，注意到对于点(1,0)，不存在(x2,y2)∈M，使得1×x2+0×lnx2=0，因为x2=0与真数的限制条件x2>0矛盾，因此④不是“好集合”．故答案为：②③32.已知集合{a,b，c}={0，1，2}，有下列三个关系①a≠2；②b=2；③c≠0，若三个关系中有且只有一个正确的，则a+2b+3c=____________．【答案】5【解析】由已知，若a≠2正确，则a=0或a=1，即a=0，b=1，c=2或a=0，b=2，c=1或a=1，b=0，c=2或a=1，b=2，c=0，均与“三个关系有且只有一个正确”矛盾；若b=2正确，则a≠2正确，不符合题意；所以，只有c≠0正确，a=2，b=0，c=1，故a+2b+3c=5.故答案为：5．。
初中七年级英语单选题专题训练100题(含参考答案)
初中七年级英语单选题专题训练100题含答案一、单项选择1．A(n)________ is a large shop. You can buy different things there.A．store B．office C．hall2．I’m afraid______if you don’t study hard, you’ll fail the exam.A．that B．/C．what D．which3．He said he would come to see us ________ the next afternoon.A．some times B．some time C．sometimes D．sometime 4．—What do you think of our new school football team?—Great! We are confident of the _______ in the coming final.A．purpose B．result C．victory D．increase 5．Our family members are going to _____ a big dinner tomorrow.A．has B．have C．/6．David, ________ make trouble at school.A．can't B．don't C．doesn't D．couldn't 7．—________—Yes, P-E-N.A．How do you spell “pen”?B．Is that a pen?C．Please spell “pen”.D．Can you spell “pen”?8．If the weather is nice, we could have a(n) ________ in the park.A．picnic B．chance C．place D．idea 9．The sense of happiness will increase if you________ what you like to do.A．do B．did C．will do10．________falls in Thailand from April 13th to 15th and people walk to the street throwing water to each other.A．Water Festival B．Spring Festival C．Mid-autumn Festival 11．—I can’t find my ________. How can I get into the room?—You can call the police.A．key B．wallet C．phone D．book 12．Which is not allowed to take with you if you want to go to Qianfo Mountain?A．A B．B C．C D．D 13．His suit looks ______ than the one I bought yesterday.A．good B．better C．best D．the best 14．—Mother’s Day is coming. Here is a pair of jeans for you, Mum.— ______ beautiful blue jeans! Thank you, Amy.A．How a B．How C．What a D．What 15．—What’s your father’s ________?— He is a doctor.A．job B．name C．grade16．Come to our store and buy some ________. The T-shirts, shoes and shorts are on sale. A．clothes B．vegetables C．stars D．sports 17．—Excuse me __________ your grandparents like walking after supper?—Sorry, I don’t know. We don’t live together.A．are B．doesC．is D．do18．any meat in the soup?A．Are there B．Is there C．There is19．Amy is really a ________ girl, and all of us like her.A．naughty B．lovely C．quiet D．love 20．—Hello, are you from America?—_________________.A．No, I am.B．I’m not.C．Yes, I am.D．Yes, I’m not.21．I hope Mary ________ to me after she arrives in Beijing.A．will write B．to write C．writes D．writing 22．The house is not for us to live in.A．small enough B．enough small C．big enough D．enough big 23．You must do your homework quickly. 划线单词的词性是：A．介词B．形容词C．副词24．书写时占三格的字母是。
初中八年级英语单选题专题训练100题 含答案
初中八年级英语单选题专题训练100题含答案一、单项选择1．---What happened?---The mouse saw the cat and_________ quickly.A．run away B．running awayC．ran away D．runs away2．—What is a UFO?—I don’t know. But I have a ________ here. You can find the answer (答案) here. A．map B．schoolbag C．dictionary3．—Is Julia’s birthday on May 1st?—Yes, ________.A．she is B．it is C．he is D．you are 4．–Who is that girl?--She is my ________, my uncle’s daughter.A．aunt B．sister C．cousin5．_______beautiful your jumper is!A．What a B．What C．How a D．How 6．—How is your mother now? I hear she is ill.—Oh, thank you. She is ________ to look after ________ now.A．well enough; her B．good enough; herself C．enough good; her D．well enough; herself7．—You'd better take a raincoat. The radio says it________ in the afternoon.—Thank you. I've got one in my bag.A．will rain B．rains C．is raining D．has rained 8．Millie wants to buy a T-shirt, she should go to the ____________.A．toy shop B．clothes shop C．flower shop D．bookshop 9．Which is the _____________ to the bus stop, please?A．road B．way C．street D．address 10．The sign “” means _______.A．Don’t touch B．No entry C．No smoking11．—_______ Sandy in any club?—Yes, she is a member _______ the Reading Club.A．Does; of B．Is; at C．Does; in D．Is; of 12．--- Lucy practicing playing the piano right now? ---Yes, she . A．Do; do B．Does; doesC．Is; is D．Is; does13．People in Britain say “autumn”，while people in the USA say “________”．A．fall B．store C．yard D．truck 14．When you leave the room, make sure the door ________.A．is locking B．will be locked C．was locked D．is locked 15．The last time I ______her, she ___________ at a medical college.A．was visiting; studied B．visited; studiedC．visited; was studying D．was visiting; was studying 16．—Bob likes sports very much.Why not buy him a ________？—Good idea.A．book B．football C．knife D．watch 17．下列字母的小写形式占中下格的是________。
初中英语单选题专题训练100题(含参考答案)
初中英语单选题专题训练100题含答案一、单项选择1．Linda often ___________ in the morning.A．exercises B．exercise C．exercising D．exercised 2．________ excellent graduate James is! He has got several offers from big companies. A．What an B．How C．What D．What a 3．The volleyball star eats ________.A．good B．well C．worse D．bad 4．—Can you see any ________ in Henry’s room?—Yes! I can see a desk and two chairs.A．fruit B．buildings C．furniture D．photos 5．This TV show made a great . A large number of people liked it very much. A．decision B．success C．difference 6．—Let’s ________ basketball after school!—That ________ good.A．play; sounds B．playing; is sound C．plays; sound D．play; sound 7．下列字母中书写体占上中下三格的是：A．h B．f C．g D．t 8．Jenny was late this morning________ the bus didn’t come.A．or B．so C．but D．because 9．The young girl works in a store on weekends.A．library B．garden C．shop10．Now Tom works ____ than before .A．more carefully B．more carefulC．very careful D．very carefully11．They ________basketball at 9:00 yesterday morning.A．play B．played C．are playing D．were playing 12．—Let's play soccer.—That ________ relaxing.A．sounds B．sound C．is sound D．sounds is 13．— Have you got any plans for the coming weekend, Betty?— Not yet. Maybe I will enjoy the latest ________ in Wenzhou Culture Center. A．products B．wonders C．adventures D．exhibitions 14．We didn’t go ________ because it ________ heavily.A．fish; rains B．fish; rainedC．fishing; rained D．fishing; raining15．—________ you free on Sunday?—Yes. I ________ have much to do at weekends.A．Are；aren’t B．Are；don’t C．Do；don’t D．Do；aren’t 16．Sunday is the _______ day of a week.A．sixth B．last C．seventh D．first 17．There is a library near the school. You can find the library ________.A．to easy B．easy C．easily18．—Does she ________ Chinese every weekend?—________.A．study; Yes, she does B．studies; Yes, she doesn’t C．studies; Yes, she does 19．Millie’s research paper isn’t up to standard_________ she has worked at it for two weeks.A．since B．unless C．if D．although20．A．Some photocopies are now cheaper than they were.B．There are changes to the prices of all photocopies.C．There is no longer any color photocopying here.21．—Is he Jack?—________. He’s Mike.A．Yes, he is B．No, he isn’t C．Yes, he isn’t 22．Sam didn’t go to the party _________ he had a fever.A．because B．so C．but D．or23．—I went to see you yesterday evening, but you were not at home. Where were you then?—I ________ a walk by the lake with my husband.A．have taken B．took C．was taking24．_______ is in Europe (欧洲).A．Thailand B．France C．Japan D．The USA 25．________ is my friend.A．Mr. Frank B．Frank Mr.C．Mr. Black D．Black Mr. 26．________ he was very tired, he continued working in his office.A．Because B．Although C．Since D．As soon as 27．Look! There is ________ over there. Do you know him?A．a 8-year-old boy B．an 8-year-old boy C．an 8 years old boy D．a 8-years-old boy28．Amy ________ new football shoes for her brother.A．want to buy B．wants buying C．wants to buy D．want buying 29．---When a drive sees a sign _______,he can’t park his car there. A．B．C．D．30．When my father promise to buy me an iPad. ______ excited I was!A．What a B．What C．How 31．Cambridge is famous for its ________. Many famous people studied there. A．university B．hospital C．bank D．museum 32．People don’t always need ________. Sometimes all they need is an ear to listen. A．opinion B．advice C．hug D．tear 33．— Who’s the greatest man ?— Stephen Hawking, I think.A．alive B．livingC．lively D．live34．—Look at Ann, how pale she looks!—Well, she never eats ________ and that’s why she is not healthy.A．properly B．completely C．smoothly D．widely 35．At the end of the match, our school ________ won by 3:2.A．members B．group C．team D．fans 36．You can go out if all your homework________.A．done B．is done C．was done D．will be done 37．My father often ________ to work ________ 7:50 in the morning.A．go; on B．goes; at C．come; in38．—Is this your notebook?—_______．Mine is at home．It's _________．A．Yes, it is; Jack B．Yes, it is; Jack'sC．No, it isn't; Jack D．No, it isn't; Jack's39．You can find much ________ about the famous film star on the Internet. A．stories B．pictures C．tickets D．information 40．Ben’s father ________ more information about the trip to America.A．need to B．needs to C．needs D．need 41．—Look after your mother ________ and take ________ care of yourself while I’m away.—OK, Dad.A．well; well B．well; good C．good; good D．good; well 42．Now computers _________ all over the world .A．is used B．are using C．are used D．have use 43．This ________ story is about Rick, a boy who can travel around the universe by time machine.A．science fiction B．romance C．horror44．________ fine day! Let’s go and fly a kite.A．What B．What a C．What an D．How 45．—Is your name Andy?—Yes, _________.A．he is B．it is C．she is D．it’s 46．--- Lily wants to know if we ________ a picnic this weekend.--- Yes. If it ________, we will stay at home to play cards instead.A．have; will rain B．will have; will rainC．will have; rains D．have; rain47．_______ I didn’t sleep well last night, I _______ the English exam today. A．Because; do bad in B．Though; do well in C．If; do badly in 48．She is very shy, so please ______.A．be quietly B．be quiet C．keep quite D．be quite 49．People in the UK say “shop” while people in the USA say “_________”. A．vacation B．cookie C．fall D．store50．My bedroom gets cold in winter. .A．So is mineB．So does mineC．So mine does51．Aunt Li doesn’t know if it _________ tomorrow. If it _________ tomorrow, she won’t go to the park.A．will rain, will rain B．rains, will rain C．will rain, rains52．– Welcome to China!- ______.A．That’s all right B．Thank you C．It doesn’t matter D．OK53．----Would you please _____ make so much noise in the classroom?----Sorry, I ______A．don’t, don’t B．not, won’t C．not to, won’t D．to, do’t 54．My cousin hasn’t found out ________.A．what’s wrong with his computerB．what should he do with his broken bikeC．how long he has fallen in love with RoseD．which was the way to the nearest bus stop55．My diet is ___________. I am healthier than before.A．good enough B．enough good C．bad enough D．enough bad 56．Lily’s grandfather is a farm ________.A．work B．working C．workers D．worker 57．— ________ Lily come from America?— No. She ________ from America. She is English.A．Does; isn't B．Does; doesn't C．Is; isn’t D．Is; doesn’t 58．Every day, too much water _______ in our city. I think everyone should do something to save it.A．is wasted B．wastes C．wasted D．was wasted 59．----It's reported that more and more trees have been planted in the northwest of China tostop desertification.----Yes, many thousands of common people are always playing a _______ in it.A．hand B．game C．part D．trick 60．Look at the black clouds! I think it ________.A．rains B．will rain C．is raining D．is going to rain 61．I like P.E. _________ it is relaxing.A．because B．so C．and D．but 62．Does Tom ______ a brother？No，he ______．A．have；doesn't B．have；hasn'tC．has；doesn't D．has；hasn't63．Hurry up!The plane _________ at 6:50 a.m.A．is starting B．be going to start C．start D．starts64．--I want to know when Mr. Brown will arrive.--When he , I will tell you.A．will arrive B．arrived C．arrives65．Alice didn't buy the new bag ________ mother had given her a new one.A．though B．if C．when D．because 66．—They have set themselves a number of ___________to achieve by the end of the month.—Then they must be very busy every day.A．dreams B．goals C．courses D．conditions 67．Du Fu is a great Chinese poet ________ has become popular with many people around the world.A．which B．whom C．who68．________ the supermarket on Second Avenue?A．Is B．Are C．Does D．/ 69．—What do you do _______? — I practice _______ English.A．everyday; everyday B．everyday; every day C．every day; everyday 70．Neil Armstrong and Buzz Aldrin landed on the moon ________ they wanted to learn more about the moon and the space.A．as soon as B．if C．because D．although71．The shoes are very nice and cheap. ________.A．I'll take itB．I will make themC．I will take themD．I will have them72．Simon plays very_______ in the football match.A．well B．good C．wonderful D．happy 73．We should set up our __________ of life, fight for it and never give up.A．hero B．trick C．task D．goal74．______ good advice you have given to me!A．What B．How C．What a75．—When will Tony return your book, Alice?—As soon as he ________ reading it.A．will finish B．finishes C．finished76．--Kate has made great progress these days.--___,and____.A．So she has,so you have.B．So she has,so have you.C．So has she,so have you.77．Jack likes taking photos wherever he goes, so his father bought him a ________ on his 14th birthday.A．violin B．camera C．bicycle78．Don’t worry. He is________to work out the maths problem.A．cleverly enough B．enough cleverly C．clever enough D．enough clever 79．Is my book in the ____?A．ruler B．dictionary C．schoolbag D．eraser80．--- Dad, it is said that the Chang’e-4 spacecraft landed on the far side of the moon. Could you tell me __________?-- Sorry. Let’s search for the information on the Internet.A．whether it is the first spacecraft to land on the far side of the moonB．when did the amazing thing happenC．if the spacecraft has done experiments or notD．how long the spacecraft has landed on the far side of the moon81．—Are you cleaning your desk?—__________．A．Yes，I do B．No，you aren'tC．Yes，I am D．No，I don't82．—They have been to Australia.—So I.A．do B．have beenC．did D．have83．—Who are they?—They are my__________.A．sister B．brother C．aunt D．sisters 84．________ strong and tall boy your brother is!A．What a B．How C．What D．How a 85．All of them hope Mr Smith ________ the important meeting.A．to attend B．attends C．attending D．attend 86．That's a girl. Her name is____________.A．Wang Xiaohong B．Wang Xiao Hong C．Wang xiaohong 87．—Where is Simon? We can’t find him at the party.—Perhaps he ________ home.A．has gone B．is going C．went D．was going 88．—Do you know ________ in ancient China?—I have no idea，but I know people once used tree bark (树皮) to make paper. A．how paper was made B．how was paper madeC．what paper was made from D．what was paper made from89．I don’t know if Eric ________ this Sunday. If he ________ here, I’ll call you at once. A．will come; will come B．comes; comesC．comes; will come D．will come; comes90．---Jane won the first prize in the English competition．---________big progress she has made!She used to be weak in English．A．How a B．How C．What a D．What 91．I ____ my room every day. But now I________.A．clean; am reading B．am cleaning; reading C．cleaning; read D．clean; read参考答案：1．A【详解】句意：琳达经常在早上锻炼。
2017高考英语真题单选试题专题训练
2017高考英语真题单选试题专题训练一1. His test results are not very _____. He does well one week and badly the next.A. invariableB. consequentC. continuousD. consistent[答案]D. consistent.[注释]consistent1)始终如一，前后一致：He is not consistent in his statements.(他的话并不前后一致。
)2)与.....一致：The story is not consistent with the facts. What you say is not consistent with what you do.2. The new safety regulations were agreed on after _____ with the work-force.A. conferenceB. participationC. interventionD. consultation[答案]D. consultation.[注释]consultation商议：hold a consultation with sb. about sth.(与某人商谈某事)。
conference讨论会;participation参加，参与;intervention干预，干涉。
3. The room was so quiet that she could hear the _____ of her heart.A. hittingB. beatingC. tappingD. knocking[答案]B. beating.[注释]beating 此处是动名词，指“(心)跳”：Her heart was beating furiously.4. During World War II Malta managed to _____ most of Italian and German bombers by throwing up an effective anti-aircraft screen.A. put outB. shut outC. come acrossD. get across[答案]B. shut out.[注释]shut out(=prevent from coming in; block)排除，排斥：They shut out our dust by having double windows.(他们用双层窗户防尘。
2019年中考物理专题试题训练一：声音的产生与传播(含解析)
声音的产生与传播一、单选题1.下列物体中不是声源的是（）A. 夜空中的雷鸣B. 静静挂在床头的吉他C. 秋风中正在簌簌发抖的树叶D. 正在挥舞的手臂2.如图是一款最新磁悬浮蓝牙音箱，它由一个球形音箱和一个磁悬浮底座组成.音箱悬浮在空中，一边旋转一边播放韩红的歌曲.下列说法正确的是()A. 最新磁悬浮蓝牙音箱是高科技产品，发声不需要振动B. 根据音调可以判断出是韩红的歌声C. 调节音量开关，调大音量，声音的响度就变大D. 韩红的歌声不是靠空气传到人耳的3.如图所示，下列民族乐器中，是利用空气柱振动发声的（）A. 琵琶B. 二胡C. 笛子D. 编钟4.在校园艺术节上，小梦为全校师生演奏了享誉海内外的二胡名曲《二泉映月》。
下列有关小梦二胡演奏的说法正确的是（）A. 二胡弦停止振动弦还会发声B. 二胡声能在真空中传播C. 二胡声是通过空气传入人耳的D. 二胡声一定不会成为噪音5.有一段长为18m的装满水的铁管，将耳朵贴在装满水的铁管一端，在另一端敲一下，能听到几次声音？（已知：声音在铁、水和空气中的传播速度依次为5200m/s、1500m/s和340m/s。
人耳能分清前后两次声音的时间间隔要大于0.1s）（）A. 1次B. 2次C. 3次D. 4次6.北岳恒山是我国著名的五岳之一，位于山西浑源县境内．小明暑期旅行到了这里，对着远处的高山大喊一声“我来了”，不久山谷中传来了回声，关于小明的原声和回声，下列说法正确的是（）A. 原声和回声不是由振动产生的B. 原声和回声不需要介质也能传播C. 原声和回声的振动频率不同D. 原声和回声的传播速度相同7.科学考察工作者为了测海底某处的深度，从海面向海底垂直发射超声波，经过0.6s收到回波信号．则该处海水深度是（声音在海水中传播的速度约1500m/s）（）A. 300mB. 450mC. 900mD. 1800m8.根据如图提供的小资料，下列说法正确的是（）A. 蝙蝠发出的声音都是超声波，人类听不见B. 因为大象和狗的“发声频率”没有重叠区，所以狗的叫声大象永远也听不见C. 家人之间悄悄说话，身边的狗狗无动于衷，因为“悄悄话”的频率狗狗是无法感知的D. 静谧的夜晚我们身边的狗狗有时突然耳朵一竖并转动几下，这可能是狗狗听到了人类听不见的声音9.在探究人耳怎样听到声音时，可以用肥皂膜模拟人耳的鼓膜。
高中物理专题训练-万有引力(一)
一、单选题(共19小题,每小题5.0分,共95分)1.把行星运动近似看做匀速圆周运动以后，开普勒第三定律可写为T2＝，m为行星质量，则可推得()A．行星受太阳的引力为F＝kB．行星受太阳的引力都相同C．行星受太阳的引力为F＝kD．质量越大的行星受太阳的引力一定越大2.两个行星的质量分别为m1和m2，它们绕太阳运行的轨道半径分别为r1和r2，若它们只受太阳引力的作用，那么这两个行星的向心加速度之比为()A． 1B．C．D．3.地球的质量是月球质量的81倍，若地球吸引月球的力的大小为F，则月球吸引地球的力的大小为()A．B．FC． 9FD． 81F4.2001年11月19日1时30分夜空出现了壮美的天文奇观——流星雨大爆发．此次狮子座流星雨来自于33年回归一次的坦普尔——塔特尔彗星．彗星的碎屑高速运行并与地球相遇，部分落入地球大气层燃烧，形成划过天空的流星雨．这次流星暴雨最亮的流星超过满月的亮度．下列有关说法中正确的是()A．流星对地球的吸引力小于地球对流星的吸引力，所以流星落向地球B．流星进入大气层后，速度越来越大，加速度越来越大C．流星对地球的引力和地球对流星的引力大小相等，但流星的质量小，加速度大，所以改变运动方向落向地球D．这次流星雨是在受到坦普尔——塔特尔彗星斥力作用下落向地球的5.地球对月球具有相当大的万有引力，可它们没有靠在一起，这是因为()A．不仅地球对月球有万有引力，月球对地球也有万有引力，这两个力大小相等，方向相反，互相抵消了B．不仅地球对月球有万有引力，太阳系中的其他星球对月球也有万有引力，这些力的合力为零C．地球对月球的引力还不算大D．地球对月球的万有引力不断改变月球的运动方向，使得月球围绕地球运动6.物理学的发展丰富了人类对物质世界的认识，推动了科学技术的创新和革命，促进了物质生产的繁荣与人类文明的进步．下列表述错误的是()A．牛顿发现了万有引力定律B．卡文迪许通过实验测出了万有引力常量C．开普勒研究第谷的天文观测数据，发现了行星运动的规律D．伽利略发现地月间的引力满足距离平方反比规律7.对于绕地球做圆周运动的卫星来说，它们绕地球做圆周运动的周期会随着轨道半径的变化而变化，某同学根据测得的不同卫星做圆周运动的半径r与周期T关系作出如图所示图象，则可求得地球质量为(已知引力常量为G)()A．B．C．D．8.牛顿提出太阳和行星间的引力F＝G后，为证明地球表面的重力和地球对月球的引力是同种力，也遵循这个规律，他进行了“月－地检验”．“月－地检验”所运用的知识是()A．开普勒三定律和牛顿第二定律B．开普勒三定律和圆周运动知识C．开普勒三定律和牛顿第三定律D．牛顿第二定律和和圆周运动知识9.如图所示，两个半径分别为r1＝0.60 m，r2＝0.40 m，质量分布均匀的实心球质量分别为m1＝4.0 kg，m2＝1.0 kg，两球间距离为r＝2.0 m，则两球间相互引力的大小为()A． 6.67×10－11NB．大于6.67×10－11NC．小于6.67×10－11ND．不能确定10.两个质量分布均匀且大小相同的实心小铁球紧靠在一起，它们之间的万有引力为F，若两个半径是小铁球2倍的实心大铁球紧靠在一起，则它们之间的万有引力为()A． 2FB． 4FC． 8FD． 16F11.有两个大小一样、同种材料制成的均匀球体紧靠在一起，它们之间的万有引力为F.若用上述材料制成两个半径更小的均匀球体把它们靠在一起，它们之间的万有引力()A．等于FB．小于FC．大于FD．无法比较12.设想质量为m的物体放到地球的中心，地球质量为M，半径为R，则物体与地球间的万有引力为()A．零B．无穷大C．GD．无法确定13.某行星的质量是地球质量的一半，半径也是地球半径的一半，那么一个物体在此行星表面附近所受到的引力是它在地球表面附近所受引力的()A． 2倍B． 4倍C．D．14.如图所示，地球半径为R，O为球心，A为地球表面上的点，B为O、A连线间的中点．设想在地球内部挖掉一以B为圆心，半径为的球，忽略地球自转影响，将地球视为质量分布均匀的球体．则挖出球体后A点的重力加速度与挖去球体前的重力加速度之比为()A．B．C．D．15.如图所示，有一个质量为M，半径为R，密度均匀的大球体．从中挖去一个半径为的小球体，并在空腔中心放置一质量为m的质点，则大球体的剩余部分对该质点的万有引力大小为(已知质量分布均匀的球壳对壳内物体的引力为零)()A．GB．GC． 4GD． 016.若用假想的引力场线描绘质量相等的两星球之间的引力场分布，使其他星球在该引力场中任意一点所受引力的方向沿该点引力场线的切线上并指向箭头方向．则描述该引力场的引力场线分布图是()A．B．C．D．17.理论上已经证明：质量分布均匀的球壳对壳内物体的万有引力为零．假设地球是一半径为R、质量分布均匀的实心球体，O为球心，以O为原点建立坐标轴Ox，如图甲所示．一个质量一定的小物体(假设它能够在地球内部移动)在x轴上各位置受到的引力大小用F表示，则图乙所示的四个F随x的变化关系图正确的是()A．B．C．D．18.两个质量均为m的星体，其连线的垂直平分线为MN，O为两星体连线的中点，如图所示，一物体从O沿OM方向运动，则它所受到的万有引力大小F随距离r的变化情况大致正确的是(不考虑其他星体的影响)()A．B．C．D．19.设地球是一质量分布均匀的球体，O为地心．已知质量分布均匀的球壳对壳内物体的引力为零．在下列四个图中，能正确描述x轴上各点的重力加速度g的分布情况的是()A．B．C．D．二、多选题(共7小题,每小题5.0分,共35分)20.(多选)下列说法正确的是()A．在探究太阳对行星的引力规律时，我们引用了公式F＝，这个关系式实际上是牛顿第二定律，是可以在实验室中得到验证的B．在探究太阳对行星的引力规律时，我们引用了公式v＝，这个关系式实际上是匀速圆周运动的一个公式，它是由速度的定义式得来的C．在探究太阳对行星的引力规律时，我们引用了公式＝k，这个关系式是开普勒第三定律，是可以在实验室中得到证明的D．在探究太阳对行星的引力规律时，使用的三个公式，都是可以在实验室中得到证明的21.(多选)根据开普勒行星运动定律和圆周运动知识知：太阳对行星的引力F∝，行星对太阳的引力F′∝，其中M、m分别为太阳和行星的质量，r为太阳与行星间的距离．下列说法正确的是()A．由F∝和F′∝知F∶F′＝m∶MB．F和F′大小相等，是作用力与反作用力C．F和F′大小相等，是同一个力D．太阳对行星的引力提供行星绕太阳做圆周运动的向心力22.(多选)对于太阳与行星间的引力表达式F＝G，下列说法正确的是()A．公式中的G为比例系数，与太阳、行星均无关B．M、m彼此受到的引力总是大小相等C．M、m彼此受到的引力是一对平衡力，合力等于0，M和m都处于平衡状态D．M、m彼此受到的引力是一对作用力与反作用力23.(多选)关于太阳与行星间的引力，下列说法正确的是()A．由于地球比木星离太阳近，所以太阳对地球的引力一定比对木星的引力大B．行星绕太阳沿椭圆轨道运动时，在近日点所受引力大，在远日点所受引力小C．由F＝G可知，G＝，由此可见G与F和r2的乘积成正比，与M和m的乘积成反比D．行星绕太阳的椭圆轨道可近似看做圆轨道，其向心力来源于太阳对行星的引力24.(多选)在物理学的发展过程中，许多物理学家的科学发现推动了人类历史的进步．下列表述符合物理学史实的是()A．开普勒认为只有在一定的条件下，弹簧的弹力才与弹簧的形变量成正比B．伽利略用“月—地检验”证实了万有引力定律的正确性C．卡文迪许利用实验较为准确地测出了引力常量G的数值D．牛顿认为在足够高的山上以足够大的水平速度抛出一物，物体就不会再落回地球上25.(多选)如图所示，三颗质量均为m的地球同步卫星等间隔分布在半径为r的圆轨道上，设地球质量为M、半径为R，下列说法正确的是()A．地球对一颗卫星的引力大小B．一颗卫星对地球的引力大小为C．两颗卫星之间的引力大小为D．三颗卫星对地球引力的合力大小为零26.(多选)要使两个物体之间的万有引力减小到原来的，可采用的方法是()A．使两物体之间的距离增至原来的2倍，质量不变B．使两物体的质量各减少一半，距离保持不变C．使其中一个物体的质量减为原来的，距离保持不变D．使两物体的质量及它们之间的距离都减为原来的答案解析1.【答案】C【解析】行星受到的太阳的引力提供行星绕太阳做匀速圆周运动的向心力，则有F＝m，又因为v＝，代入上式得F＝.由开普勒第三定律＝k，得T2＝，代入上式得F＝k.太阳与行星间的引力与太阳、行星的质量及太阳与行星间的距离有关．故选C.2.【答案】D【解析】设行星m1、m2的向心力分别是F1、F2，由太阳、行星之间的作用规律可得：F1∝，F2∝，而a1＝，a2＝，故＝，D项正确．3.【答案】B【解析】根据牛顿第三定律，力的作用是相互的，且作用力与反作用力总是大小相等、方向相反，并且作用在同一条直线上．4.【答案】C【解析】流星落向地球的主要原因是地球的吸引力，流星对地球的引力和地球对流星的引力大小相等，但流星的质量小，加速度大，所以改变运动方向落向地球．5.【答案】D【解析】地球对月球的引力和月球对地球的引力是相互作用力，作用在两个物体上不能相互抵消，A错．地球对月球的引力提供了月球绕地球做圆周运动的向心力，从而不断改变月球的运动方向，所以B、C错，D对．6.【答案】D【解析】牛顿发现了万有引力定律，A正确；卡文迪许第一次在实验室里测出了万有引力常量，B 正确；开普勒发现了行星的三大运动规律，C正确；牛顿发现地月间的引力满足距离平方反比规律，D错误；故选D.7.【答案】A【解析】由万有引力提供向心力有：G＝m r，得：r3＝，由题图可知：＝＝，则地球的质量为：M＝，故A正确，B、C、D错误．8.【答案】D【解析】9.【答案】C【解析】运用万有引力定律公式F＝G进行计算时，首先要明确公式中各物理量的含义，对于质量分布均匀的球体，r指的是两个球心间的距离，显然题目所给的距离是不符合要求的，两球心间的距离应为r＋r1＋r2＝3.0 m．两球间的引力为F＝，代入数据可得2.96×10－11N.10.【答案】D【解析】小铁球之间的万有引力F＝G＝G大铁球半径是小铁球的2倍，其质量分别为小铁球：m＝ρV＝ρπr3大铁球：M＝ρV′＝ρ[π(2r)3]＝8ρ·πr3＝8m故两个大铁球间的万有引力F′＝G＝G＝16G＝16F.11.【答案】B【解析】12.【答案】A【解析】设想把物体放到地球的中心，此时F＝G已不适用．地球的各部分对物体的吸引力是对称的，故物体与地球间的万有引力是零．13.【答案】A【解析】根据万有引力定律得：F＝行星质量是地球质量的一半，半径也是地球半径的一半，一个物体在此行星上的万有引力和地球上万有引力之比：＝＝2故选项A正确．14.【答案】A【解析】挖前，质量为m的物体在A点受到的重力mg＝G，挖去质量为M′的球体后在A点受到的重力mg′＝G－G，M＝ρπR3，M′＝ρπ()3，联立各式解得＝.故选A.15.【答案】B【解析】采用割补法，先将空腔填满；填入的球的球心与质点重合，填入球上各个部分对质点m 的引力的矢量和为零；均匀球壳对内部的质点的万有引力的合力为零，根据万有引力定律，有：G＝F＋0，解得：F＝，故选B.16.【答案】B【解析】其他星球在该引力场中任意一点必定受到两星球的万有引力，方向应指向两星球，A、D 错，由于两星球相互间引力场间的影响，其引力场线应是弯曲的，C错；故描述该引力场的引力场线分布图是图B.17.【答案】A【解析】球壳内距离球心r的位置，外面环形球壳对其引力为0，内部以r为半径的球体看做球心处的质点，对其引力为F＝＝＝Gρπrm，引力大小与r成正比，图像为倾斜直线，当r>R时，球体看做圆心处的质点，引力F＝＝，F∝，对照选项A对，B、C、D错．18.【答案】B【解析】设物体的质量为m′，物体到O点的距离为r，星体到O点的距离为l，物体受到的万有引力为F＝×，当r＝0时，F＝0，当r＝∞时，F＝0；由表达式可知F与r不可能是线性关系，故选项B正确．19.【答案】A【解析】在地球内部距圆心为r处，G＝mg′，内部质量M′＝ρ·πr3，得g′＝，g′与r 成正比；在地球外部，重力加速度g＝G，与成正比，选项A正确．20.【答案】AB【解析】开普勒的三大定律是通过对行星运动的观察而总结归纳出来的规律，每一条都是经验定律，故开普勒的三大定律都是在实验室中无法验证的规律．21.【答案】BD【解析】F′和F大小相等、方向相反，是作用力与反作用力，太阳对行星的引力提供行星绕太阳做圆周运动的向心力．故正确选项为B、D.22.【答案】ABD【解析】太阳与行星间的引力是两物体因质量而引起的一种力，分别作用在两个物体上，是一对作用力与反作用力，不能进行合成，故B、D正确，C错误；公式中的G为比例系数，与太阳、行星均没有关系，A正确．23.【答案】BD【解析】根据F＝G，太阳对行星的引力大小与m、r有关，对同一行星，r越大，F越小，对不同行星，r越小，F不一定越大，还要由行星质量决定，故A错误，B正确；公式中G为比例系数，是一常量，与F、r、M、m均无关，C错误；通常的研究中，行星绕太阳运动的椭圆轨道可近似看做圆轨道，向心力由太阳对行星的引力提供，D正确．24.【答案】CD【解析】胡克认为只有在一定的条件下，弹簧的弹力才与弹簧的形变量成正比，故A错误；牛顿用“月－地检验”证实了万有引力定律的正确性，故B错误；卡文迪许利用实验较为准确地测出了引力常量G的数值，故C正确；牛顿认为在足够高的高山上以足够大的水平速度抛出一物体，物体就不会再落在地球上，故D正确；故选C、D.25.【答案】BCD【解析】计算卫星与地球间的引力，r应为卫星到地球球心间的距离也就是卫星运行轨道半径r，而r－R为同步卫星距地面的高度，故A错误，B正确；根据几何关系可知，两同步卫星间的距离d＝r，故两卫星间的引力大小为，故C正确；卫星对地球的引力均沿卫星地球间的连线向外，由于三颗卫星质量大小相等，对地球的引力大小相等，又因为三颗卫星等间隔分布，根据几何关系可知，地球受到三个卫星的引力大小相等且方向成120°角，所以合力为0，故D正确．26.【答案】ABC【解析】根据F＝G可知，当两物体质量不变，距离增至原来的2倍时，两物体间的万有引力F′＝＝·＝F，A正确；当两物体的距离保持不变，质量各减少一半时，万有引力F′＝＝·＝F，B正确；当只有一个物体的质量减为原来的时，万有引力F′＝＝·＝F，C正确；当两物体的质量及它们之间的距离都减为原来的时，万有引力F′＝＝＝F，D错误．。
小升初英语单选题专题训练150题含参考答案(精选5篇)
小升初英语单选题专项训练150题含答案一、单选题1．I like basketball ______________ I like football.A．and B．are2．woodA．moon B．good C．classroom 3．Bob has two big books on his desk.句子中四个斜体单词画线部分读音与众不同的是___________________.A．Bob B．big C．books D．desk 4．找出划线部分发音不同的选项（）A．today B．wait C．cat D．cake 5．找出划线部分发音不相同的单词（）A．girl B．hair C．first 6．wood和wolf划线部分的字母发音相同吗？（）A．相同B．不同7．选出划线部分发音不同的单词（）A．car B．park C．bag8．/u:/A．fruit B．could C．buy9．选出画线部分发音不同的单词（）A．study B．cute C．duck 10．选出画线部分发音不同的单词（）A．lost B．hope C．nose 11．找出画线部分读音不同的单词（）A．study B．future C．united D．built 12．选出划线部分发音不同的单词（）A．owl B．now C．cowD．tomorrow13．The bedroom is so messy.You have _________the floor.A．sweeping B．sweeps C．to sweep 14．选出划线部分发音不同的一项（）A．cake B．dad C．name 15．选出画线部分发音不同的单词（）A．cap B．make C．map D．black 16．选出划线部分发音不同的单词（）A．nice B．big C．six D．Miss 17．Tom is going to a photo in the park.A．take B．takes C．taking 18．—What's Jill doing?—He's ____ his pictures ____ his friends.A．show, to B．showing, to C．showing, for 19．— They are big and strong. What ______________ they?— ______________ elephants.A．are, an B．is, It's C．are, They're 20．_______a Chinatown in New York.A．There are B．There be C．There is 21．This is ________ old shirt.A．an B．a C．/22．It as the medical team made its way to the front.A．snowed B．snows C．is snowing D．was snowing23．This time yesterday Tina _______.A．was dancing B．was danced C．were dancing D．were danced24．He said that he _______ TV at that time.A．was watching B．watches C．watching D．has watched E．None of the above25．We _______ supper when the phone rang.A．were having B．was having C．are having D．ishaving26．He told me he soon.A．will going B．goes C．is going D．was going27．选出划线部分读音与众不同的单词（）A．leg B．he C．pen 28．—How does your mother usually come?—_______________________.A．She usually walks.B．I often come by bus.C．The bus is coming.29．Johnny, you ____ play with the knife, you ____ hurt yourself.A．won't; can't B．mustn't; mayC．shouldn't; must D．can't; shouldn't30．What ____ she do?A．does B．do C．is答案解析部分1．【答案】A2．【答案】B3．【答案】D4．【答案】C5．【答案】B6．【答案】A7．【答案】C8．【答案】A9．【答案】B10．【答案】A11．【答案】A12．【答案】D13．【答案】C14．【答案】B15．【答案】B16．【答案】A17．【答案】A18．【答案】B19．【答案】C20．【答案】C21．【答案】A22．【答案】D23．【答案】A24．【答案】A25．【答案】A26．【答案】D27．【答案】B28．【答案】A29．【答案】B30．【答案】A小升初英语单选题专项训练150题含答案一、单选题1．I don't know any new songs __________ dances.A．or B．and C．with2．My cousin saw a mouse in the house. 哪一个线部分发音和其它两个不同?A．cousin B．mouse C．house3．找出下列单词中与其它不同的单词（）A．near B．bear C．pear4．选出划线部分发音不同的选项（）A．health B．sweater C．easy5．选出画线部分读音不同的—项（）A．send B．every C．shoe6．tallA．/tɔ:/B．/tɒl/C．/tɔ:l/7．选出与所给单词划线部分读音相同的选项：longA．wrong B．run C．young8．找出画线部分发音不同的单词（）A．peach B．seat C．bread D．tea 9．找出划线部分读音与众不同的词A．earth B．early C．learn D．heart 10．选出画线部分发音不同的单词（）A．spring B．picnic C．winter D．holiday 11．lineA．pilot B．milk C．big12．选出画线部分发音不同的—项（）A．three B．thin C．mother13．He is a teacher.He English.A．teach B．teaches C．teaching 14．找出划线部分发音不同的一项（）A．tomorrow B．show C．window D．now 15．选出与单词画线部分发音相同的一项：thankA．that B．thinner C．these16．选出画线部分发音不同的单词（）A．lamp B．apple C．age17．Did you _______ the fire alarm last night?A．hearing B．heard C．hear D．listen to 18．I see ____ animals on the farm.A．a lot B．lot of C．a lot of 19．Look at the monkeys. They _____ thin.A．are B．am C．is20．—Is there a park here?—No, _______ isn't.A．it B．there C．this 21．Today we're going to learn the lesson．A．twenty B．20 C．twentieth D．twentth 22．Mary _____ a dress when she cut her finger.A．made B．is making C．was making D．makes 23．What ____ he_____ when his mother opened the door?A．did, do B．had, done C．will, do D．was, doing24．While he _______ for the bus, he was reading a newspaper.A．waiting B．was waiting C．was waited D．to wait 25．She asked him whether he back to lunch.A．come B．was came C．is coming D．was coming26．Tom up at six o'clock every day that week.A．getting B．was getting C．get D．to get 27．选出画线部分发音不同的单词（）A．price B．visit C．film28．I have apple. apple is on the table.A．a; An B．the; The C．an; An D．an; The 29．________ the baby's mother talking?A．Am B．Is C．Does 30．What's this?A．It's a cat.B．It's a cap.答案解析部分1．【答案】A2．【答案】A3．【答案】A4．【答案】C5．【答案】C6．【答案】C7．【答案】A8．【答案】C9．【答案】D10．【答案】D11．【答案】A12．【答案】C13．【答案】B14．【答案】D15．【答案】B16．【答案】C17．【答案】C18．【答案】C19．【答案】A20．【答案】B21．【答案】C22．【答案】C23．【答案】D24．【答案】B25．【答案】D26．【答案】B27．【答案】A28．【答案】D29．【答案】B30．【答案】A小升初英语单选题专项训练150题含答案一、单选题1．These ____my shoes.A．is B．are C．am2．以下哪个划线字母是发[e]的音A．let B．she C．we3．以下划线字母哪个不是发/f/的音A．fox B．fun C．vet4．以下划线字母哪个不是发/m/的音A．mouse B．nose C．monkey5．以下哪个划线字母是发[i] 的音A．big B．rice C．like6．以下哪个划线字母是发[ai]的音A．pig B．bike C．fish7．选出划线部分读音相同的一组A．koala，climb，cake B．cute，car，goat C．grin，kick，grab 8．选出划线部分读音相同的一项A．mad，monkey B．leopard，mix C．milk，lazy 9．以下哪组划线字母发音相同A．three，sheep B．bus，hello C．hi，his 10．以下哪个划线字母不是发[ei]的音A．at B．grape C．plate11．以下哪组划线字母发音相同A．white，milk B．time，ice C．is，nice 12．以下哪个划线字母是发[ʌ]的音A．cute B．tube C．run13．My brother_____while he_______ his bike and hurt himself.A．fell; was riding B．fell; were ridingC．had fallen; rode D．had fallen; was riding14．以下划线字母哪个不是发/l/的音A．lazy B．mom C．lion15．以下哪组划线字母发音相同A．just，use B．sunny，lunch C．cup，cute 16．以下哪个划线字母是发[əu]的音A．on B．socks C．so17．—______ are they going to____ tomorrow?—They are going to have a party.A．When; do B．What; go C．What; do 18．I like ________ and ________.A．danceing; swimming B．dancing; swiming C．dancing; swimming19．You __________ the football team.A．is B．am C．are 20．There __________ a meeting tomorrow afternoon.A．will be going to B．will going to be C．is going to be 21．This is eraser. eraser is mine.A．a; The B．an; The C．the; The D．an; An 22．He _______ his car while I was cooking.A．clean B．was cleaning C．to clean D．was cleaned23．We along the river when it rained.A．walk B．walking C．was walking D．were walking24．This time yesterday Jack _______ TV.A．was watching B．were watching C．is watching D．are watching25．While we _______, the teacher came in.A．to talk B．were talking C．talk D．are talking26．Alan _______ cards with his friends when his mother came home.A．was playing B．were playing C．to play D．play 27．以下哪组划线字母发音不同A．know，rose B．lock，hole C．box，job 28．There are days in a year．A．three hundreds and sixty five B．three hundred and sixty-five C．three hundred s and sixty five D．three hundreds and sixty—five 29．Wu Binbin ________ black glasses and his shoes ________ blue.A．has; is B．has; are C．have; are 30．I __________ like bananas.A．am B．don't C．do答案解析部分1．【答案】B2．【答案】A3．【答案】C4．【答案】B5．【答案】A6．【答案】B7．【答案】A8．【答案】A9．【答案】A10．【答案】A11．【答案】B12．【答案】C13．【答案】A14．【答案】B15．【答案】B16．【答案】C17．【答案】C18．【答案】C19．【答案】C20．【答案】C21．【答案】B22．【答案】B23．【答案】D24．【答案】A25．【答案】B26．【答案】A27．【答案】B28．【答案】B29．【答案】B30．【答案】B小升初英语单选题专项训练150题含答案一、单选题1．It's so dark in the basement(地下室). Why not a candle?A．make B．light C．hide2．选出画线部分发音不同的单词（）A．other B．thank C．with3．从下列单词中选择一个划线部分发音与另外两个不同的一项() A．read B．bread C．head4．根据发音规则，选择相同发音的选项。
名词1
第二部分语法专题训练(单选＋词汇)(一)名词Ⅰ.单项选择。
( )1.The ________ often eat the grass on the hill.A．cow B．horse C．sheep D．rabbit( )2.Today it's easy for us to get much________ about traveling on the Internet.A．picture B．map C．ticket D．information( )3.—Danny，you look so happy!—Because I got a good________ just now.A．news B．job C．advice D．paper( )4.There are a lot of ________ in the factory.They work very hard.A．man workers B．women workersC．men worker D．women worker( )5.—Lucy，how much do you think is the pair of shoes?—Twenty dollars________ enough.A．is B．were C．am D．be( )6.—Uncle，how far is your company from here?—It's about________ walk.A．ten minute B．ten minutesC．ten minutes' D．ten minute's( )7.Yesterday afternoon ________ fathers didn't attend the class meeting because they went to Beijing.A．Danny and Lily's B．Danny's and Lily'sC．Danny and Lily D．Danny's and Lily( )8.There is a new clothes store near my house，but it only sells ________ clothes.A．child B．children C．child's D．children's( )9.I found some beautiful flowers in________ bedroom.A．Sara and Kate B．Sara's and Kate'sC．Sara's and Kate D．Sara and Kate's( )10.Bill Smith，an old friend of ________，has decided to give up smoking.A．fathers B．my fathersC．my father's D．my fathers'( )11.If you want to play the violin well，you need to do some ________.A．practice B．pleasure C．challenge D．attention ( )12.Jim had no ________ why Lisa left the party without a word.A．need B．idea C．mind D．chance( )13.The restaurant is very popular here.Look！There are so many ________ eating here.A．cooks B．dishes C．waiters D．customers( )14.For many people，it's common________that music can change how we feel.A．direction B．informationC．knowledge D．instruction( )15.—What's your plan for the next weekend?—Oh，I haven't made a________ yet.Maybe I will visit my grandmother.A．journey B．difference C．decision D．promise ( )16.The two model planes on the table are ________.A．the twins' B．the twin's C．twins D．twin's ( )17.—I think dragons are the ________ of China.Do you think so?—I agree with you.A．symbol B．situation C．promise D．shape ( )18.Premier Li said we should speed up the Internet and lower the ________.A．money B．price C．value D．service( )19.I want to write to my grandmother.Please pass me ________.A．two piece of paper B．two piece of papersC．two pieces of paper D．two pieces of papers( )20.—Can you tell me who the old woman over there under the big tree is?—Oh，she's ________ grandmother.A．Tom and Mike's B．Tom's and Mike'sC．Tom's and Mike D．Tom and Mike( )21.All the ________ teachers enjoyed themselves on March 8th，because it was their own holiday.A．man B．men C．woman D．women( )22.—I want to buy the book The Transparent Carrot by Mo Yan.Do you know its ________？—Not really.Maybe 25 yuan.A．cover B．size C．color D．price( )23.—Can you get a piano for me，dear?—But there isn't enough ________ for it in our house.A．place B．floor C．room D．ground( )24.We have no ________ in the fridge.Let's go and buy some cucumbers，carrots and cabbages.A．vegetables B．eggs C．meat D．fruit( )25.—A study shows that good habits play a very important ________ in children's education.—I think so.A．sense B．part C．reason D．meaning( )26.A new shop is opening.Look，there are so many ________ here.A．food B．dish C．people D．waiter( )27.Dashan was born in Canada，but Beijing has become his second ________.A．home B．family C．house D．country( )28.—May I know your ________，Mr.Yang?—Of course.I'm 1.85 metres tall.A．width B．weight C．length D．height( )29.It's difficult to hear your ________ because the ________ of traffic is too high.A．voice；noise B．sound；voiceC．noise；sound D．noise；voice( )30.My father enjoys playing tennis.It's one of his ________.A．habit B．habits C．hobby D．hobbies( )31.—Where is David?—He's left a(n)________ saying that he has something important to do.A．advice B．news C．message D．sentence( )32.—Lily，let's make vegetable salad.How many ________ do we need?—One is enough.A．oranges B．potato C．tomatoes D．cheese ( )33.—Bill is ill.Do you know what's wrong with him?—Poor boy.His illness is the ________ of eating bad food.A．cause B．result C．reason D．end( )34.After a three－day heavy rain，the lake rose ________.A．two feet and a half B．two and a half footC．two and half feet D．two foot and a half( )35.I want sweet milk.Put some ________ in my cup，please.A．ice B．soup C．salt D．sugar( )36.—Can I help you?—I'd like ________ for my twin daughters.A．two pair of shoes B．two pairs of shoeC．two pair of shoe D．two pairs of shoesⅡ.词汇运用。
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单选专题训练（一）1. China has ______ long history and she is the first country to invent printing in ______ history.A. a; theB. /; /C. a; /D. /; the2. In Martin Luther King’s time, the money spent on educating a black child was justone fourth of ____ on each white child.A. that spentB. what to be spentC. it had beenD. which was spent3. After 20 years in an African country, I returned home and found it changed ______recognition.A. overB. beyondC. more thanD. out of4. Do you know the of the saying I just referred to?A.resourceB.sourceC.courseD.cause5. ______criticize my son, I______ help him find a more effective way to learn English.A. Rather than; prefer toB. Other than; would ratherC. Rather than; would like toD. Better than; had better6．By the end of this year, 160 new students ___ in the English Department of this world famous university．A．have enroll B．will have enrolledC．have been enrolled D．will have been enrolled7. The handbook gives ________ details about the functions of this washing machine.A. steadyB. secureC. potentialD. precise8. Parents and their children often disagree about the amount of freedom and responsibility that young people ______.A. would haveB. are havingC. are to haveD. are about to have9. All flights ________ because of the snowstorm, many passengers could do nothingbut take the train .A. had been canceledB. was canceledC. having been canceledD. being canceled10.After the meeting, Premier Wen Jiabao walked onto the platform, _____ himselfin a chair and prepared for answering questions.A. seatingB. seatedC. being seatedD. had seated11.Not having finished his homework, _____ to watch TV.A. mother forbade himB. so he was forbiddenC. he forbadeD. he was forbidden12. The magician picked some persons from the audience _____ and asked them tohelp him with the performance．A．by accident B．in vain C．at random D．on average 13. That is the only way we can imagine ______ the overuse of water in students’bathroom.A. reducingB. to reduceC. reducedD. reduce14. Before I buy a car, I would like to have a mechanic, whom I truly trust, ______.A. look it overB. looking it overC. to look it overD. looked it over15. ______ on his father’s shoulders made it possible for Victor, a boy of five, towatch the show.A. Having carriedB. CarryingC. Being carriedD. Carried16. ------I’m afraid I can’t finish the book within this week.------______.A．Please go ahead B．That’s rightC．Not at all D．Take your time17. Though ______ of danger, he still went swimming in the river, which cost hislife.A. was warnedB. warnedC. warningD. to be warned18. ____ that witnessed the emergence of and the ongoing debate over GeneticallyModified Food.A.During the first 10 years in the 21st centuryB.That it was in the first ten years of the 21st centuryC.It was in the first ten years of the 21st centuryD. It was the first ten years of the 21st century19. In that newly-built computer centre, there are a great number of moderncomputers, with six experts _______ questions that users may ask.A. answeringB. answerC. answeredD. being answering20. The problem of carbon emissio ns ______ in society now has aroused the public’swide concern again.A. to be discussedB. being discussedC. having discussedD. having been discussed21. He ___ away before we arrived, since the house was deserted．A．shall have gone B．should have goneC．could have gone D．must have gone22. Many factors contribute to____, but the most destructive is the role that humanshave played.A. animals to dieB. dying animalsC. animals died outD. animals dying out23. —Jack, this is the third time that you have been late this week.—Sorry, sir, but I was _____ for 15 minutes on the way.A. held upB. put upC. taken upD. given up 24．______all by herself for many years, the old lady is sometimes very difficult______.A. Having lived; to be got along withB. Living; to get on well withC. Having lived; to get along withD. Living; to get along25. The new movie____________ to be one of the biggest money-makers of all time．A promises B．agrees C．pretends D．intends26. I have promised that my daughter _______ get a new electronic dictionary on hernext birthday.A. shouldB. mustC. shallD. would27. My car's performance is ___ since the engine's been tuned and the tires have beenchanged．A．better as twice B．twice as the conditionC．twice as good D．twice as better28．My uncle is quite worn out from years of hard work. He is no longer the man _____ he was fifteen years ago.A. whichB. whomC. whoD. that29. I advise you to stay away from Maria. Although she is usually easy-going, she______ be quite annoying sometimes.A. canB. needC. mustD. should30. _____ he did a great deal to help the poor was known to every voter.A. ThatB. WhatC. WhetherD. As31. In fact, many of our guests ask for accommodations here _________ they come.A. at timeB. first timeC. for the first timeD. each time 32．Nobody believed his reason for being absent from the class ______ he had to meet his uncle at the uncle.A. whyB. thatC. whereD. because33．______, but he still couldn't understand the logical connection of the two subjects．A．Having told many times B．Having been told many times C．He had been told many times D．Many times as he was told34. – Can you think of a case in which the ecology of an idea is in balance?-- Sure. You see, _________ an environment is undisturbed, the ecology of the area is in balance.A. unlessB. asC. thoughD. where35. The most important thing we must consider before carrying out the plan is ______it is possible for us to carry it on.A. whenB. whyC. whetherD. that36. The more things a man is interested in, ______.A. the more he will have opportunities of happinessB. the more opportunities of happiness he will haveC. the more opportunities of happiness will he haveD. much more opportunities of happiness he will have37．I want to use the same tools ____ used in your factory a few days ago.A. as wasB. which wasC. as wereD. which38. You don’t think she is more anxious to go there alone than you are, ______?A. do youB. are youC. isn’t sheD. don’t you39. _________ solve the medical care for the low-income earners and theunemployed.A. Only by joint efforts can weB. By only joint efforts we canC. Only by joint efforts we canD. Only we can joint effort40. Man must keep in mind that it will be years ______ the earth recovers from thedamage he makes to it.A. whenB. untilC. sinceD. before41. The pilot lost contact with the military base,________ the plane crashed in thedesert.A. by means of whichB. for whichC. in case of whichD. as a result of which42. As a new-comer of the class, Sarah hopes to become a friend of___ s hares herinterests and has common outlooks．A．whoever B．whomever C. no matter who D．anyone 43. If he had a real talent for painting, a painter he should be; if not, he must take tosome other craft, ____ he would have the chance of making himself a decent livelihood.A. whereB. whichC. asD. when44. ____ his father and stepfather were Muslim, American black president, BarackObama is Christian．A．When B．Even C．As D．While45. Madame Curie, for _________ life had once been very hard, discoveredradioactivity.A. whomB. whoseC. whoD. which46. If you want to do the experiment again, you’d better be more careful ______ youmake a mistake.A. only ifB. as ifC. so thatD. in case47. By no means ______to go hiking this weekend．She has too much homework todo．A．will Jane agree B．Jane will agreeC．will agree Jane D．did Jane agree48. In our daily life, we often come across occasion ______ we have to tell white liesto avoid hurting others.A. thatB. whichC. whenD. where49. What would have happened _______, as far as the river bank?A. Bob had walked fartherB. If Bob should walk fartherC. Had Bob walked fartherD. If Bob walked farther50. ____ as the main reason for the recent world-wide economic problems is the factthat US government would hardly accept.A. RegardingB. To regardC. RegardedD. Being regarded1---5 CABBA 6----10 DDCCB 11----15 DCBAC 16---20 DBDAB21---25 DDACA 26---30 CCDAA 31-----35 DBCDC 36---40 BCAAD41---45 DAADA 46---50 DACCC单选专题训练（二）1. Tour guides need to be independent, outgoing and have _____desire to share ____ information.A. /; theB. a; /C. the; theD. a; the2. In Beijing ,although there is a good public transport system, ________ private car is still becoming ________ popular means of transportation.A．不填;the B．the ;a C．the ;the D．a;不填3. It is no ________ arguing with Bill because he will never change his mind.A. useB. helpC. timeD. way4. —How beautiful the dress looks on you ! Don’t you want, Madam?—Well ,please show me .A．one; other B．it; other C．it; another D．one; the other5. John didn’t choose of the ties and went away without looking at a third one.A．many B．either C．all D．any6. I will visit Austria ______ the invitation of my friend this summer vacation．A．by B．for C．to D．at7. —I thought you would join in my birthday party tomorrow．—I would if I ____ to attend an important meeting．A．don't have B．didn't have C．will not have D．would not have8. Tired, Jim was fast asleep with his back a big tree.A. inB. belowC. besideD. against9. —When did you last hear Jay?—He phoned me this morning, and we agreed a time and place to meet.A. of, toB. about, withC. from, withD. from, on10. What the scientist said sounded strange, ______ ,they made sense.A．therefore B．however C．since D．otherwise11. It is known to us all E-mail is______ efficient than sending a fax.A．much B．many C．more much D．much more12. While studying, fix your mind on what is really important or you will __remembering nothing.A. end upB. take upC. lead toD. stick to13. Nothing after the terrible fire caused by the careless doorkeeper.A．left B．continued C．kept D．remained14. —Guess what? I happened to meet Johnson in the street last Friday．—If my memory serves me correctly, you ____ each other for ages．A．haven't seen B．hadn't seen C．didn't see D．don't see15. If you are a migrant worker who have no Guangzhou hukou, you might still rent a house________ you find a contract job with a Guangzhou company.A. now thatB. on condition thatC. even thoughD. since16. Jane was elected chairman of the committee. This is the first time that a woman ___ to the post.A. has appointedB. had appointedC. has been appointedD. had been appointed17. ––Have you seen my e-mail about our TESL project?––Yes. Luckily I checked my e-mails yesterday. Normally I ______ my e-mail box for days.A. haven’t openedB. didn’t openC. hadn’t openedD. don’t open18. I ____ toward the door to go outside when suddenly Jim opened it unexpectedly．A．walked B．was walking C．had walked D．had been walking19. I have to see the doctor because I a lot lately.A. have been coughingB. had coughedC. coughedD. cough20. The train for Shanghai _____ at 9 tomorrow morning. So you are _______ to get everythingready at 7 o’clock.A. will leave, supposedB. are leaving, supposeC. leaves, supposedD. is going to leave, suppose21. The science fiction was not published until 35 years after it .A. has been completedB. has completedC. was completedD. completed22. Once ____ the forest, you ought to remain ____ you are waiting for help．A．losing; where B．losing; there C．lost; there D．lost; where 23. With the victory at the French Open, Li Na has reached NO．4 in the world, ______ theprevious Asian record．A．equaled B．equaling C．to have equaled D．having equaled24. Alexander tried to get his work in the medical circles.A. to recognizeB. recognizingC. recognizeD. recognized25. This advice is of some value, I think. It deserves _____________.A. being consideredB. to be consideredC. to considerD. considered26. --- Who are you waiting for?--- _____ us a lecture this afternoon.A. The professor wants to giveB. The professor will giveC. The professor about to giveD. The professor to give27. He told us whether _______ a picnic was still under discussion.A. to haveB. havingC. haveD. had28. ___ in 1995, the Metro system for China's commercial capital has doubled in reach to 420kmin just the past year;Shanghai did in 15 years ___ London did in 150.A. Beginning; whatB. Beginning; thatC. Begun; whatD. To begin; that29. We rushed to the football court, only to see a sign_____ into the ground reading PERIODICMAINTENANCE (定期维修).A．knocked B．knocking C．to be knocked D．being knocked30. My son has gone abroad. I’m looking forward to him_______.A. returnB. to returnC. returningD. returned31. Walking exercises___ be boring at times, but on a clear sunny morning nothing could bebetter．A．may B．will C．must D．should32. Thank you so much! But for your text message, I____ home without my ID card this morning.A. would have leftB. would leaveC. had leftD. left33. You buy a gift, but you can if you want to.A. mustB. mustn’tC. have toD. don’t have to34. ––Do you think it wise for parents to do everything for their children?––No. That’s ______ they’re mistaken.A. whetherB. whenC. whatD. where35. Mr. Frank asked me a question I could go with him to he called theTreasure House the next week.A．that; which B．whether; that C．whether; what D．that; where36. His family members gave some examples of _________ his drinking and smoking hadaffected the family.A．that B．what C．how D．whether37. Has it ever struck you ______ it would be like to have no one you could trust?A. thatB. whoC. whichD. what38. Eliza remembers everything exactly as if it ______ yesterday.A．was happening B．happens C．has happened D．happened39. you are aware of the trick used in advertisements ,I don’t think you are eager to buy.A. WhetherB. UntilC. ThoughD. Once40. Many of them turned a deaf ear to his advice, _____ they knew it to be valuable.A. as ifB. even ifC. now thatD. so that41. – I like your new shoes!– Thanks. I had to try on almost a dozen pairs ___________ I decided to get them.A. asB. whenC. afterD. before42. He is now paying __attention to what the article says than to the way___ the language is used.A. a lot more; thatB. much more; on whichC. very more; in whichD. even more; by which43. We hope the measures to control prices, are taken by the government, will succeed.A．as B．when C．since D．after44. There are many examples throughout the world ______ talented players are ignored by theirnational managers.A. whenB. whereC. whichD. whose45. —Have you seen the film The War Horsey—Of course, I have．It was in my hometown ______ it was made．A．where B．when C．that D．which46. —Did you know any French before you arrived in Paris?—Never it, actually.A. had I learnedB. have I learnedC. was I learningD. I learned47. Either you or one of your students to attend the meeting that is due tomorrow.A. areB. isC. haveD. be48. According to some studies, EQ is _____ important, if not more important than IQ.A. soB. veryC. evenD. as49. --- Angelia looks blue today.--- Yes, but she won’t say_____ bothers her.A . why is it thatB . that is whyC . it is whatD . what it is that50. ---Jack is really a brave guy.--- ___. And we can’t admire his courage ___.A. So is he; a lotB. So he is; very muchC. So he is; too muchD. So is he; a little单选专题训练（二）1-5 BBACB 6-10 DBDDB 11-15 DADBB 16-20 CDBAC 21-25 CDBDB 26-30DACAC 31-35 AADDC 36-40 CDDDB 41-45 DAABC 46-50 ABDDC。