初一周周练2
苏科版七年级数学下第二周练习题
七年级数学周周练第二周一、填空: 1.如图1,与∠1是同位角的角是 ,与∠1是内错角的角是 ,与∠1是同旁内角的角是 .图1 图2 图3 图4 2.如图2,∠ _ 与∠C 是直线 _ 与 _ 被直线 _ 所截得的同位角,∠ __ 与∠3是直线 _ 与 被直线 _ 所截得的内错角,∠ _ 与∠A 是直线AB 与BC 被直线 _ 所截得的同旁内角.3.如图3,①如果∠B =∠1,那么根据___________________________,可得AD ∥BC ; ②如果∠D =∠1,那么根据___________________________,可得AB ∥CD .4.如图4,①如果AD ∥BC ,那么根据两直线平行,同旁内角互补,得∠___+∠ABC =180°;②如果AB ∥CD ,那么根据两直线平行,同旁内角互补,可得∠_____+∠ABC =180°5.如图5,平行直线a 、b 被直线l 所截,如果∠1=75°,那么∠2=______°,∠3=___°, ∠4=_______°,∠5=_______°,∠6=_______°,∠7=_______°,∠8=_______°. _图5 图6 图7 6.如图6,用平移三角尺的方法可以检验出图中共有平行线_________对. 7.如图7,直线1l ∥2l ,AB ⊥1l ,垂足为D,BC 与2l 相交于点E,若∠1=43°,则∠2= .二、填空:1. 下列条件中能得到互相平行的直线的是( )A 、互为邻补角的角平分线所在的直线B 、对顶角的平分线所在的直线C 、两条平行线的一对内错角的平分线所在的直线D 、两条平行线的一对同旁内角的平分线所在的直线2.如图8,等腰△DEF 是由等腰△ABC 平移得到的,则下列说法中正确的是 ( ) A .AB 与EF 是对应线段; B .AB 与DF 是对应线段; C .∠B 与∠E 是对应角; D .点A 与点图 8 图 9D E F A B C BC 1l 2l A 1 23.如图9,在宽为20m ,长为30m 的矩形地面上修建两条同样宽的道路,余下部分作为耕地.根据图中数据,计算耕地的面积为( )A .600m 2 B .551m 2C .550m 2D .500m 2 4.图10是一块电脑主板的示意图,每一转角处都是直角,数据如图所示,则该主板的周长是 ( ).80mm D .84mm图115.如图11,OP∥QR∥ST,则下列各式中正确的是 ( )A .∠1+∠2+∠3=180°B .∠1+∠2-∠3=90°C .∠1-∠2+∠3=90°D .∠2+∠3-∠1=180°6、如图,阴影部分的面积为 ( ) A .a 2; B .2πa 2; C .πa 2; D .4πa 2.三、解答题:1. 如图,请你根据图中的信息,把小船ABCD 通过平移 后到A B C D ''''的位置,画出平移后的小船位置.3.如图,如果∠3+∠4=180°,那么∠1与∠2是否相等?为什么?4.如图,如果AB//CD ,∠B=37°,∠D=37°,那么BC 与DE 平行吗? 为什么?4321 a a a aa a第/6题图H FED C B A 5.如图,AD//BC ,∠A=∠C.AB 与DC 平行吗?为什么?6、两个直角三角形重叠在一起,将其中一个三角形沿着点B 到点C 的方向平移到△DEF 的位置,AB=10,DH=4,平移距离为6,求阴影部分的面积.7、如图,D E ⊥AC 于E ,BC ⊥AC ,FG ⊥AB ,∠1=∠2。
人教版英语七年级上册周周练—第二周
第二周人教版英语七年级上册周周练考查范围:Starter Unit 2一、单项选择1.英文字母中, 有两个可以单独作单词, 它们分别是_____。
A.I; UB.I; AC.I; OD.A; E2.在四线格中, 占三格的小写字母是_____。
A.f; jB.i; j; fC.f; j; pD.q; p3.—Mary, who's the man over there?—He's my uncle(叔叔), _____ English teacher.A.theB.aC.anD./4.—Jill, who ________ that in the white coat?—It's my brother, Joe.A. didB. doesC. areD. is5.—What's this in English?—_____ a jacket.A.This'sB.It'sC.This is6.—What's that in English?—_____.A.It's whiteB.It's an penC.It's a greenD.It's a monkey7.—How do you _____ your name?—J-I-M, Jim.A.lookB.spellC.beD.say8.What's this _____ English?A.inB.atC.toD.for9.—_____ this in English?—_____ a CD player.A.What's; This isB.What's; It isC.What; It's10.—Spell it, please.—_____.A.It's a jacketB.Yes, J-A-C-K-E-TC.J-A-C-K-E-TD.Thank you二、阅读理解AAre you planning a birthday party for your son or daughter and can't decide what to do? People in different countries celebrate their birthday in different ways.Philip Evans, from Paris, smiles at us, "I'm going to be thirty years old next week, so I'm going to invite three very good friends out for dinner. In France, when it is your birthday, you often invite people out. In some countries, I know it's the opposite (相反) —the people take you out."Mr. and Mrs. Sato are from Tokyo. Mr. Sato is going to be sixty tomorrow. "In Japan, the sixtieth birthday called KanreKi-the beginning of a new life. The red color is for a new life, so we always give something red for a sixtieth birthday."Mrs. SatoLi Xiaomei from Beijing feels very excited and tells us, "Tomorrow is my sixteenth birthday. It's a special birthday, so we're going to have a family party. I'm probably going to get some money in lucky envelopes from my relatives (亲戚) . My mother is going to cook noodles. Noodles are for a long life. "11.In Paris, someone often ______ on his or her birthday.A.has a birthday partyB.has a picnic with friendsC.invites friends out for dinnerD.eats noodles12.In ______, people call the sixtieth birthday "KanreKi".A.ParisB.JapanC.ChinaD.Australia13.What does the underlined word "secret" mean in Chinese?A.阴谋B.闹剧C.猜想D.秘密14.Which of the following is not true?A.Philip is going to take his friends out for dinner on his birthdayB.Mrs.Sato will give her husband nothing.C.In China, the noodles stand for "a long life".D.Someone can receive some money on his or her birthday.15.What's the main idea of the passage?A.On their birthdays, people are very happy.B.The birthday presents are different for different ages.C.How to celebrate birthdays in different countries.D.People celebrate their birthdays in the same way.BIt’s nice to be invited to birthday parties, but sometimes you have to say no. How do you politely(礼貌地) refuse an invitation?Send it in.If you get a written(书面的) or an e-mail invitation to a party, refusing politely is easy. All you have to do is to give a polite answer.Ask for time to think.Refusing a face-to-face invitation can be difficult. The polite way is to ask for time to check your calendar. Then, you have time to find a polite answer. Just make sure that if you’ve been invited in person, you’d better refuse it in person. It’s polite.Be thankful.Even if you have to refuse the invitation, thank him or her for the invitation all the same. If your only reason is a conflicting(冲突的) event, tell the host that you will come if the dates are different.Be honest(诚实的).This may be the most important thing in politely refusing an invitation. You wouldn’t want people to lie(说谎) to you, so it’s correct etiquette(礼节) to give an honest reason. Just say it in a polite way.根据短文内容,判断下列句子正误。
第二周(考查范围:Unit 2)——2023-2024学年牛津译林版英语七年级上册周周练
第二周考查范围:Unit 2一、单项选择1.—What _____ do you like to do?—I also like swimming.A.otherB.elseC.othersD.another2.—How does he look?—_____.A.He is 12 years oldB.He is a workerC.He looks strongD.He is my brother3.—Do you have _____ volleyball?—Yes, of course. I play _____ volleyball every day.A./; /B.the; /C.a; theD.a; /4.—_____ does Li Mei live?—She with her parents _____ in Yangzhou.A.When; livesB.Where; liveC.Where; livesD.How; live5.—Good news! We will have a party this Friday afternoon.—Oh, _____?A.OKB.all rightC.noD.really6.—_____Amy happy today?—I think so. She _____ happy today.A.Does; looksB.Does; lookC.Is; lookD.Is; looks7.They hope _____ the basketball match.A. winB. wonC. to winD. winning8.—Allen, shall we go to the bookstore this afternoon?—I'm sorry, David, but I ________ meet my cousin at the train station.A. have toB. canC. mayD. could9.I've just watched a TV programme about space. I hope _____ on the moon one day.A.walkB.walkedC.walkingD.to walk10.—My mother said you went on a Silk Road trip last year.—Yes, it _____ a wonderful trip.A.isB.wasC.will beD.were11.Xiao Dong and his father often _____ football and watch football games on TV.A.look afterB.talk aboute fromD.wake up12.Mr. Wang together with his wife and children _____ in the countryside.A.enjoys livingB.enjoy livingC.enjoys to liveD.enjoy to live13.As long as all the Chinese people pull together, our Chinese Dream will _____.A. come truee outC. come upe down14.—_____ your brother a member of the Reading Club?—No, he _____ like reading.A. Does; isB. Do; doesn'tC. Is; doesn'tD. Is; isn’t15.—Do you think it's going to rain this afternoon?—_______. We're just planning to have a picnic later this afternoon.A.I hope notB.I expect to.C.Yes, it was.D.No, I won't二、完形填空My name is Jessica. This is a photo 1 my family. My family is not very big. There are 2 people in my family. My grandparents and I are in the front. My grandparents 3 go to work. They do sports every morning. My parents and uncle are behind 4 . My father is a doctor and my mother is a nurse. They are at the same 5 . After work, my father likes 6 . It is 7 favourite sport. My mother doesn't go to work at 8 and she likes shopping on Saturdays or Sundays. My 9 is an actor at a theatre. He likes acting. Basketball and swimming are his favourite sports. I am a middle school student now. I like drawing 10 and trees after school. All the flowers and trees are very nice.1.A. of B. for C. on D. in2.A. four B. five C. six D. seven3.A. doesn't B. isn't C. aren't D. don't4.A. us B. we C. they D. them5.A. museum B. hospital C. school D. hotel6.A. sleeping B. swimming C. drawing D. writing7.A. he B. she C. her D. his8.A. weekends B. weekend C. weekdays D. the weekends9.A. sister B. brother C. uncle D. aunt10.A. dogs B. flowers C. buses D. birds三、阅读理解AMike is a boy. His father often takes him to do sports in the morning. He likes doing sportsvery much and his wish is to be a sportsman(运动员).It's Sunday today and Mike's grandpa is going to take him to watch a football game. It takes them three hours to get to the football field. The game starts at 11:00 a.m. And they get there at 10:30 a.m. The game is very wonderful(精彩的)And Mike sees his favourite football player there.After the game, his grandpa takes him to have supper. They have hamburgers together. Hamburgers are Mike's favourite food.Mike has a good day today.1.Who often takes Mike to do sports in the morning?A.His mother.B.His father.C.His grandpa.D.His parents.2.Mike wants to be a ______.A.singerB.dancerC.sportsmanD.student3.What day is it today?A.It's Sunday.B.It's Saturday.C.It's Friday.D.It's Monday.4.What are Mike and his grandpa going to do today?A.They are going to watch a baseball game.B.They are going to the zoo together.C.They are going to watch TV.D.They are going to watch a football game.5.What do they have for supper?A.Some rice.B.Hamburgers.C.Bread.D.Cakes.BSonia and Beijing OperaSonia is 14. She was born(出生) in the US, but now she is in Beijing with her parents this year because they get jobs in Beijing. She likes many things in Beijing, such as the food, the interesting places and the friendly people. But do you know what she likes most about Beijing? It's Beijing Opera(京剧). Most people think Beijing Opera is boring but Sonia doesn't think so. She loves the special (特别的)but beautiful tunes (腔调) of Beijing Opera. Now Sonia studies in No. 5 Middle School in Beijing. In the school, she can learn Beijing Opera in the music class every Friday morning. She learns a lot about Chinese history from Beijing Opera. Now, she likes singing Beijing Opera and watching Beijing Opera on TV. And she is also in the school Beijing Opera Club(俱乐部).She says, "Beijing Opera is a kind of old Chinese art. I like Beijing Opera and I like China.If I go on learning Beijing Opera, I can know more about China and I will love China more."1.Where is Sonia now?A. In the US.B. In China.C. In England2.How many things mentioned(提及) in the passage does Sonia like about Beijing?A. Two.B. Three.C. Four.3.What does Sonia think of(认为)Beijing Opera?A. Boring and special.B. Beautiful but boring.C. Special but beautiful.4.When does Sonia learn Beijing Opera every week?A. On Monday.B. On Wednesday.C. On Friday.5.What's the main idea of the passage?A. Sonia studies Chinese history in Beijing.B. Sonia likes Beijing Opera.C. Sonia's middle school life is interesting.四、任务型阅读Hello, everyone! My name is Sandy. I'm a student from Sunshine Secondary School. This is a great school. It's big and beautiful. It has three grades and each grade has six classes.I am in Class 3, Grade 7.There are forty-five students in my class, and twenty of them are girls. We are like a big family. We have a good time studying and playing together. Our teachers are all like our friends. They are nice to us and they are always ready to help us. The school day starts at 7:30 a.m. We have seven lessons every day. We do morning exercises between the first and the second lessons. The last lesson finishes at 4:30 p.m. After school we often go to clubs. We have fun in the clubs for half an hour and then go home. I usually go to the V olleyball Club. And sometimes I go to the Singing Club with Millie. Tom likes English, so he goes to the English Club and talks with some children from America or England. He is great.School life is great. I enjoy it very much.1.How many classes does Sunshine Secondary School have?________________________________.2.How many boys are there in Sandy's class?________________________________.3.When does Sandy often go home?________________________________.4.What club are Millie and Sandy in?________________________________.5.What does Sandy think of the teachers?________________________________.五、根据汉语提示写出单词1.It's ______(有趣的事)to play volleyball with friends.2.There are two basketball ______(俱乐部)in Nanjing.3.Do you eat three ______(次数)a day?4.I'm ______(空闲)today. What about going to the park?5.Visiting Beijing is one of his ______(梦想).六、看图,完成下面的对话。
高图英语周周练七年级第二册答案
高图英语周周练七年级第二册答案1、You can buy some pieces of bread from "_______". [单选题] *A. Bakery(正确答案)B. Travel AgencyC. LaundryD. Ticket Office2、( ) _____ New York _____ London have traffic problems. [单选题] *A. All…andB. Neither….norC. Both…and(正确答案)D. Either…or3、My sister _______ listen to music when she was doing her homework.[单选题] *A. used to(正确答案)B. use toC. is used toD. uses to4、?I am good at schoolwork. I often help my classmates _______ English. [单选题] *A. atB. toC. inD. with(正确答案)5、He kept walking up and down, which was a sure()that he was very worried. [单选题] *A. sign(正确答案)B. characterC. natureD. end6、Fresh _______ is good for our health. [单选题] *A. climateB. skyC. weatherD. air(正确答案)7、Researchers have spent five years collecting data()the study is based. [单选题] *A. on thatB. in whichC. in thatD. on which(正确答案)8、A lot of students in our school were born _______ March, 1 [单选题] *A. in(正确答案)B. atC. onD. since9、25.A watch is important in our life. It is used for ______ the time. [单选题] * A.telling (正确答案)B.sayingC.speakingD.holding10、If you know the answer, _______ your hand, please. [单选题] *A. put up(正确答案)B. put downC. put onD. put in11、Alice hopes to _______ more friends at her new school. [单选题] *A. visitB. make(正确答案)C. missD. take12、Ordinary books, _________ correctly, can give you much knowledge. [单选题] *A. used(正确答案)B. to useC. usingD. use13、He _______ getting up early. [单选题] *A. used toB. is used to(正确答案)C. is usedD. is used for14、—How do you find()birthday party of the Blairs? —I should say it was __________ complete failure.[单选题] *A.a; aB. the ; a(正确答案)C.a; /D.the; /15、—Can you play tennis? —______, but I’m good at football.()[单选题] *A. Yes, I can(正确答案)B. Yes, I doC. No, I can’tD. No, I don’t16、It’s usually windy in spring, ______ you can see lots of people flying kites.()[单选题] *A. so(正确答案)B. orC. butD. for17、Tom is very _______. He never cleans his room. [单选题] *A. lazy(正确答案)B. activeC. shyD. healthy18、I?have to?_______ my younger brother on Sunday. [单选题] *A. look after(正确答案)B. look upC. take careD. look out19、_______ after dinner is good for our health. [单选题] *A. WalksB. Walking(正确答案)C. WalkedD. Walk20、--Which is Tom?--He is _______ of the two boys. [单选题] *A. tallB. tallerC. the taller(正确答案)D. the tallest21、Tom’s mother will let him _______ traveling if he comes back?in five days. [单选题] *A. to goB. goesC. wentD. go(正确答案)22、( ) What she is worried __ is ____ her daughter is always addicted to chatting online./; that [单选题] *A /; thatB of thatC about that(正确答案)D about what23、—Are these your sheep? [单选题] *A)on grass at the foot of the hill.(正确答案)B. feedC.is fedD. is feeding24、A small village cuts across the river. [单选题] *A. 切B. 穿过(正确答案)C. 划船D. 踢25、It’s very hot. Please _______ your coat. [单选题] *A. look afterB. take off(正确答案)C. take onD. put on26、My brother often does ______ homework first after school.()[单选题] *A. heB. his(正确答案)C. sheD. her27、The reason why I didn't attend the lecture was simply()I got a bad cold that day. [单选题] *A. becauseB. asC. that(正确答案)D. for28、Many people prefer the bowls made of steel to the _____ made of plastic. [单选题] *A. itB. ones(正确答案)C. oneD. them29、You wouldn't have seen her if it _____ not been for him . [单选题] *A. hasB. had(正确答案)C. haveD.is having30、The beautiful radio _______ me 30 dollars. [单选题] *A. spentB. paidC. cost(正确答案)D. took。
人教部编版语文七年级上册周周练——第二周
第二周——人教部编版语文七年级上册周周练考查范围:第一单元 41.下列各组词语中加粗字的读音和字形,完全正确的一项是()A.灿烂(làn)澹澹(zhān)子规啼(tí)B.箫瑟(xiāo)竦峙(sì)歌咏志(yǒng)C.枯藤(téng)苍海(cāng)一帆悬(xuán)D.碣石(jié)归雁(yàn)断肠人(cháng)2.下列诗句的朗读节奏划分有误的一项是()A.杨花/落尽/子规啼,闻道/龙标/过五溪B.我寄/愁心与/明月,随君/直到/夜/郎西C.客路/青山外,行舟/绿水前D.枯藤/老树/昏鸦,小桥/流水/人家3.下列加粗的字词解释有误的一项是( )A.海日生残夜(升起)杨花落尽(杨树开的花)B.老树昏鸦(黄昏)古道西风(秋风)C.歌以咏志(咏叹)风正一帆悬(挂)D.星汉灿烂(银河)次北固山下(停宿)4.下列文学常识搭配有误的一项是()A.《观沧海》——曹操—一三国魏B.《闻王昌龄左迁龙标遥有此寄》——李白——唐代C.《次北固山下》——王湾——唐代D.《天净沙·秋思》——马致远——元代5.下列对《天净沙·秋思》赏析有误的一项是()A.《天净沙·秋思》表现了一个羁旅漂泊的游子浓烈的思乡之情,被称为“秋思之祖”。
B.“小桥流水人家”创设了一种清新淡雅的境界,表现了游子对大自然的喜爱以及对美好生活的憧憬。
C.作者把平淡无奇的客观景物连接成一幅简洁苍凉的水墨画,将无限愁思自然寓于画面中,寓情于景,情景交融。
D.“断肠人在天涯”描绘出天涯游子凄楚、悲怆的内心世界,画龙点睛,直抒胸臆。
6.下列对《观沧海》赏析有误的一项是()A.这是一首写景抒情诗。
诗人勾画了大海吞吐日月、包蕴万千的壮丽景象,表现了自己开阔的胸襟,抒发了自己统一中国、建功立业的抱负。
B.这首诗借景抒情,将眼前的海上景色和自己的雄心壮志融合在一起,开阔的意境和雄浑的气势是诗人宽广胸怀和豪迈气魄的表现,诗里洋溢着作者饱满的激情,表达却很含蓄。
人教版初中语文七年级下册第二学期第2周周练试卷
人教版初中语文七年级下册第二学期第2周周练试卷班级姓名得分一、选择题(每题2分,共20分)1、以下词语中注音完全错误....的一项是()。
A、确凿.(zháo)桑葚.(shèn)相宜.( yí)B、肿.胀(zǒng)叮嘱.(zū)骊.歌(lì)C、丑陋.(lòu)菜畦.(qià)嫉.妒(jí)D、瞬.息(sùn)幽寂.(jì)延绵.(mián)2、以下成语中没有错别字.....的一项是()。
A、人迹罕至B、人声鼎佛C、荒草妻妻D、来势匈匈3、联系语境,解释词语有误......的一项是()。
A、我疑心这是极好的文章,因为读到这里,他总是微笑起来,而且将头仰起,摇着,向后拗.过去,拗过去。
(拗:这里是用力弯曲的意思。
)B、一个字的命令最可怕,但是我怎么啦?居然有勇气不挪窝儿...。
(挪窝儿:这里指起床。
)C、那只最后从蛋壳里爬出来的小鸭是那么丑陋,他处处挨啄,被排挤,被讪笑..,不仅在鸭群中是如此,连在鸡群中也是这样。
(讪笑:善意的笑。
)D、我不知道为什么家里的人要将我送进书塾..里去了,而且还是全城中称为最严厉的书塾。
(书塾:就是私塾,旧时家庭、宗教或教师自己设立的教学处所。
)4、把下列词语填入下列横线上,最恰当...的一项()。
黄色的树林里分出两条路,可惜我不能同时去__________,我在那路口久久_________,我向着一条路极目望去,直到它___________在丛林深处。
A、探索站立消失B、涉足站立不见C、涉足伫立消失D、探索伫立消失5、下列句子中没有语病....的一项是()。
A、通过这次春游,使众多同学开阔了视野。
B、能否合理安排时间,是决定考试胜败的关键。
C、春天的平潭,是美丽的季节。
D、我是一名合格的中学生。
6、下列诗句中停顿完全正确....的句子是()。
A、借旁/近与之,即书/诗四句…B、其诗/以养父母、收族为意……C、余/闻之/也久。
七年级数学下学期第二周周练试题(含解析) 北师大版
2015-2016学年福建省三明市宁化县城东中学七年级(下)第二周周练数学试卷一、选择题1.下面计算正确的是()A.a4•a2=a8B.b3+b3=b6C.x5+x2=x7D.x•x7=x82.(﹣2a3)2等于()A.4a5B.4a6C.4a9D.﹣4a63.(2×3﹣12÷2)0=()A.0 B.1 C.12 D.无意义4.下列各式中一定正确的是()A.(2x﹣3)0=1 B.π0=0 C.(a2﹣1)0=1 D.(m2+1)0=15.结果为a2的式子是()A.a6÷a3B.a4•a﹣2C.(a﹣1)2D.a4﹣a26.下列运算正确的是()A.x5•x=x5B.x5﹣x2=x3C.(﹣y)2(﹣y)7=y9D.﹣y3•(﹣y)7=y107.1纳米=0.000 000 001米,则2.5纳米应表示为()米.A.2.5×10﹣8B.2.5×10﹣9C.2.5×10﹣10D.2.5×1098.下列运算正确的是()A.a2•a3=a6B.(﹣y2)3=y6C.(m2n)3=m5n3D.﹣2x2+5x2=3x29.下列等式正确的是()①0.000126=1.26×10﹣4;②3.10×104=31000;③1.1×10﹣5=0.000011;④12600000=1.26×106.A.①② B.②④ C.①②③D.①③④10.计算25m÷5m的结果是()A.5 B.20 C.5m D.20m二、填空题11.用科学记数法表示0.000000125,结果为.12.计算:﹣b2•(﹣b)2(﹣b3)= .13.计算:(﹣a)6÷(﹣a)3= .14.(0.125)2008×82009= .15.若64×83=2x,则x= .16.变形化简到底数为(x﹣y),化简:(x﹣y)2(y﹣x)3= .三、计算与求解(第17~22题,每题5分,第23题6分,共36分)17.(﹣3a3)2÷a2.18.x5•x4﹣x6•x2•x.19.(π﹣3)0+(﹣)3﹣()﹣2.20.(﹣102)÷50÷(2×10)0﹣(0.5)﹣2.21.计算:(﹣3x3)2﹣[(2x)2]3.22.计算:(x4)2+(x2)4﹣x(x2)2•x3﹣(﹣x)3•(﹣x2)2•(﹣x)23.若52x+1=125,求(x﹣2)2014的值.2015-2016学年福建省三明市宁化县城东中学七年级(下)第二周周练数学试卷参考答案与试题解析一、选择题1.(2010春•常熟市校级期中)下面计算正确的是()A.a4•a2=a8B.b3+b3=b6C.x5+x2=x7D.x•x7=x8【考点】同底数幂的乘法;合并同类项.【分析】根据同底数幂的乘法的性质:底数不变,指数相加;合并同类项的法则:只把系数相加,字母部分完全不变,对各选项分析判断后利用排除法求解.【解答】解:A,a4•a2=a4+2=a6,故此选项错误.B,b3+b3=(1+1)b3=2b3,故此选项错误.C,x5+x2,不是同类项不能合并,故此选项错误.D,x•x7=x1+7=x8,故此选项正确.故选D.【点评】此题主要考查了合并同类项,同底数幂的乘法,理清指数的变化是解题的关键.2.(﹣2a3)2等于()A.4a5B.4a6C.4a9D.﹣4a6【考点】幂的乘方与积的乘方.【分析】根据幂的乘法和积的乘方法则求解.【解答】解:原式=4a6.故选B【点评】本题考查了幂的乘法和积的乘方,掌握运算法则是解答本题的关键.3.(2×3﹣12÷2)0=()A.0 B.1 C.12 D.无意义【考点】零指数幂.【分析】根据任何非零数的零次幂等于1解答.【解答】解:∵2×3﹣12÷2=6﹣6=0,∴(2×3﹣12÷2)0无意义.故选D.【点评】本题考查了零指数幂,熟记a0=1(a≠0)是解题的关键.4.下列各式中一定正确的是()A.(2x﹣3)0=1 B.π0=0 C.(a2﹣1)0=1 D.(m2+1)0=1【考点】零指数幂.【分析】根据零指数幂的运算法则进行计算即可.【解答】解:A、当(2x﹣3)0=1时,x≠,故本选项错误;B、π0=1,故本选项错误;C、当(a2﹣1)0=1时,a≠±1,故本选项错误;D、(m2+1)0=1,故本选项正确;故选D.【点评】本题考查的是零指数幂,熟知任何不等于0的数的0次幂都等于1是解答此题的关键.5.结果为a2的式子是()A.a6÷a3B.a4•a﹣2C.(a﹣1)2D.a4﹣a2【考点】负整数指数幂;同底数幂的乘法;幂的乘方与积的乘方;同底数幂的除法.【专题】计算题.【分析】根据同底数幂除法、同底数幂乘法和幂的乘方的性质,利用排除法求解.【解答】解:A、a6÷a3=a3,错误;B、a4•a﹣2=a2,正确;C、(a﹣1)2=,错误;D、a4﹣a2=a2(a2﹣1),错误.故选B.【点评】本题考查同底数幂的运算:乘法法则,底数不变,指数相加;除法法则,底数不变,指数相减;乘方,底数不变,指数相乘.6.下列运算正确的是()A.x5•x=x5B.x5﹣x2=x3C.(﹣y)2(﹣y)7=y9D.﹣y3•(﹣y)7=y10【考点】幂的乘方与积的乘方;合并同类项;同底数幂的乘法.【分析】根据同底数幂相乘,底数不变指数相加;合并同类项法则:把同类项的系数相加,所得结果作为系数,字母和字母的指数不变;对各选项分析判断后利用排除法求解.【解答】解:A、x5•x=x6,故A错误;B、x5,x2不是同类项不能合并,故B错误;C、(﹣y)2(﹣y)7=﹣y9,故C错误;D、﹣y3•(﹣y)7=y10,故D正确.故选:D.【点评】本题考查合并同类项、同底数幂的乘法,熟练掌握运算性质和法则是解题的关键.7.1纳米=0.000 000 001米,则2.5纳米应表示为()米.A.2.5×10﹣8B.2.5×10﹣9C.2.5×10﹣10D.2.5×109【考点】科学记数法—表示较小的数.【分析】绝对值小于1的正数也可以利用科学记数法表示,一般形式为a×10﹣n,与较大数的科学记数法不同的是其所使用的是负指数幂,指数由原数左边起第一个不为零的数字前面的0的个数所决定.【解答】解:2.5纳米=2.5×10﹣9米,故选:B.【点评】本题考查用科学记数法表示较小的数,一般形式为a×10﹣n,其中1≤|a|<10,n为由原数左边起第一个不为零的数字前面的0的个数所决定.8.下列运算正确的是()A.a2•a3=a6B.(﹣y2)3=y6C.(m2n)3=m5n3D.﹣2x2+5x2=3x2【考点】同底数幂的乘法;合并同类项;幂的乘方与积的乘方.【分析】根据:同底数幂相乘,底数不变,指数相加;幂的乘方,底数不变指数相乘;积的乘方,等于把积中的每一个因式分别乘方,再把所得的幂相乘;合并同类项,只把系数相加减,字母与字母的次数不变,对各选项分析判断后利用排除法求解.【解答】解:A、应为a2•a3=a5,故本选项错误;B、应为(﹣y2)3=﹣y2×3=﹣y6,故本选项错误;C、应为(m2n)3=m6n3,故本选项错误;D、﹣2x2+5x2=3x2,正确.故选D.【点评】本题主要考查同底数幂的乘法的性质,幂的乘方的性质,积的乘方的性质,合并同类项的法则,熟练掌握性质和法则是解题的关键.9.下列等式正确的是()①0.000126=1.26×10﹣4;②3.10×104=31000;③1.1×10﹣5=0.000011;④12600000=1.26×106.A.①② B.②④ C.①②③D.①③④【考点】科学记数法—表示较大的数;科学记数法—表示较小的数;科学记数法—原数.【分析】直接利用科学计数法表示方法以及科学计数法与原数的关系得出答案.【解答】解:①0.000126=1.26×10﹣4,正确;②3.10×104=31000,正确;③1.1×10﹣5=0.000011,正确;④12600000=1.26×107,错误;故选:C.【点评】此题主要考查了科学计数法表示方法以及科学计数法与原数的关系,正确掌握科学计数法的表示方法是解题关键.10.计算25m÷5m的结果是()A.5 B.20 C.5m D.20m【考点】同底数幂的除法.【分析】25是5的平方,因而本题可以转化为同底数的幂的除法运算,再利用同底数幂相除,底数不变指数相减计算.【解答】解:25m÷5m,=52m÷5m,=5m.故选C.【点评】本题考查了同底数幂的除法,把25m转化为52m是本题解决的关键.二、填空题11.用科学记数法表示0.000000125,结果为 1.25×10﹣7.【考点】科学记数法—表示较小的数.【分析】绝对值小于1的正数也可以利用科学记数法表示,一般形式为a×10﹣n,与较大数的科学记数法不同的是其所使用的是负指数幂,指数由原数左边起第一个不为零的数字前面的0的个数所决定.【解答】解:0.000000125=1.25×10﹣7.故答案为:1.25×10﹣7.【点评】本题考查用科学记数法表示较小的数,一般形式为a×10﹣n,其中1≤|a|<10,n为由原数左边起第一个不为零的数字前面的0的个数所决定.12.计算:﹣b2•(﹣b)2(﹣b3)= b7.【考点】幂的乘方与积的乘方;同底数幂的乘法.【分析】根据幂的乘方底数不变指数相乘,可得单项式乘法,可得答案.【解答】解:原式=﹣b2•b2(﹣b3)=b2+2+3=b7,故答案为:b7.【点评】本题考查了幂的乘方与积的乘方,熟记法则并根据法则计算是解题关键.13.计算:(﹣a)6÷(﹣a)3= ﹣a3.【考点】同底数幂的除法;幂的乘方与积的乘方.【分析】直接利用同底数幂的除法的知识求解即可求得答案.【解答】解:(﹣a)6÷(﹣a)3=(﹣a)3=﹣a3.故答案为:﹣a3.【点评】此题考查了同底数幂的除法.注意掌握指数与符号的变化是解此题的关键.14.(2014春•工业园区校级月考)(0.125)2008×82009= 8 .【考点】幂的乘方与积的乘方;同底数幂的乘法.【分析】根据(a)x×b x=(ab)x,进行运算即可.【解答】解:原式=(0.125×8)2008×8=8.故答案为:8.【点评】本题考查了幂的乘方与积的乘方,解答本题的关键是运用公式:(a)x×b x=(ab)x.15.若64×83=2x,则x= 15 .【考点】幂的乘方与积的乘方;同底数幂的乘法.【专题】计算题.【分析】把64×83都写成以2为底数的幂相乘的形式,然后根据幂的乘方,底数不变指数相乘,同底数幂相乘,底数不变指数相加进行计算,再根据指数相等列式求解.【解答】解:64×83=26×(23)3=26×29=26+9=215∵64×83=2x,∴x=15.故答案为:15.【点评】本题考查了同底数幂的乘法,幂的乘方的性质,写成以2为底数的幂的运算是解题的关键.16.变形化简到底数为(x﹣y),化简:(x﹣y)2(y﹣x)3= ﹣(x﹣y)5.【考点】同底数幂的乘法.【专题】计算题.【分析】先把(y﹣x)3化为(x﹣y)3,然后利用同底数幂的乘法法则运算.【解答】解:原式=﹣(x﹣y)2•(x﹣y)3=﹣(x﹣y)5.故答案为﹣(x﹣y)5.【点评】本题考查了同底数幂的乘法:同底数幂的乘法法则:同底数幂相乘,底数不变,指数相加,即a m•a n=a m+n(m,n是正整数).三、计算与求解(第17~22题,每题5分,第23题6分,共36分)17.2÷a2.【考点】整式的除法;幂的乘方与积的乘方.【分析】根据单项式的除法计算即可.【解答】解:(﹣3a3)2÷a2=9a4.【点评】本题考查了整式的运算,用到的知识点有:单项式的除法.18.x5•x4﹣x6•x2•x.【考点】同底数幂的乘法.【分析】根据同底数幂的乘法底数不变指数相加,合并同类项系数相加字母及指数不变,可得答案.【解答】解:x5•x4﹣x6•x2•x=x9﹣x9=0.【点评】本题考查了同底数幂的乘法,熟记法则并根据法则计算是解题关键.19.(π﹣3)0+(﹣)3﹣()﹣2.【考点】负整数指数幂;零指数幂.【分析】根据非零的零次幂等于1,负数的奇数次幂是负数,负整数指数幂与正整数指数幂互为倒数,可得答案.【解答】解:原式=1﹣+9=.【点评】本题考查了负整数指数幂,利用非零的零次幂等于1,负数的奇数次幂是负数,负整数指数幂与正整数指数幂互为倒数是解题关键.20.(﹣102)÷50÷(2×10)0﹣(0.5)﹣2.【考点】负整数指数幂;零指数幂.【分析】此题涉及乘方、零次幂、负整数指数幂,首先针对各考点进行计算,然后再计算有理数的除法,再算加法即可.【解答】解:原式=﹣100÷1÷1﹣4,=﹣100﹣4,=﹣104.【点评】此题主要考查了乘方、零次幂、负整数指数幂,关键是掌握零指数幂:a0=1(a≠0),负整数指数幂:a﹣p=(a≠0,p为正整数).21.计算:(﹣3x3)2﹣[(2x)2]3.【考点】幂的乘方与积的乘方.【分析】直接利用积的乘方运算法则化简,进而合并同类项得出答案.【解答】解:(﹣3x3)2﹣[(2x)2]3=9x6﹣(4x2)3=﹣55x6.【点评】此题主要考查了幂的乘方与积的乘方运算,正确掌握运算法则是解题关键.22.计算:(x4)2+(x2)4﹣x(x2)2•x3﹣(﹣x)3•(﹣x2)2•(﹣x)【考点】幂的乘方与积的乘方;同底数幂的乘法.【分析】直接利用同底数幂的乘法、幂的乘方与积的乘方以及合并同类项的知识求解即可求得答案.【解答】解:(x4)2+(x2)4﹣x(x2)2•x3﹣(﹣x)3•(﹣x2)2•(﹣x)=x8+x8﹣x8﹣x8=0.【点评】此题考查了同底数幂的乘法、幂的乘方与积的乘方.此题比较简单,注意掌握指数与符号的变化是解此题的关键.23.若52x+1=125,求(x﹣2)2014的值.【考点】幂的乘方与积的乘方;同底数幂的乘法.【分析】利用有理数的乘方运算法则得出x的值,进而代入原式求出答案.【解答】解:∵52x+1=125=53,∴2x+1=3,解得:x=1,则(x﹣2)2014=(1﹣2)2014=1.【点评】此题主要考查了同底数幂的乘方运算,正确求出x的值是解题关键.。
7年级第二周周练
启明星教育个性化辅导教案二、课内文言文阅读:5.选出加点字解释不正确的一项( )A.权谓吕蒙日谓.:对…说 B.卿言多务,孰.若孤孰:谁C.但当涉猎,见.往事耳见:看见 D.及.鲁肃过寻阳及:到、等到6.下列加点的词语意义和用法相同的是 ( )A.自以.为大有所益蒙辞以.军中多务 B.肃遂.拜蒙母意与日去,遂.成枯落C.及.鲁肃过寻阳及.其家穿井 D.宋君令人问之.丁氏久之.,目似瞑7.对下列句子的翻译正确的一项()士别三日,即更刮目相待,大兄何见事之晚,A.和有抱负的人分开几天,就更应该另眼看待,长兄怎么知道这件事这么晚呢!B.和有抱负的人分开几天,就要用新的眼光来看待,长兄为何看见这件事这么晚呢!C.土别三日,就要重新另眼看待,长兄知道这件事怎么这么晚呢!D.土别三日,就要用新的眼光来看待,长兄怎么这么晚才看见这件事呢!8.选出对课文内容理解不正确的一项()A.本文节选自《资治通鉴》,这是北宋司马光主持编纂的一部编年体通史,本文仅119字,虽极简略但剪裁精当,不仅保留了原文的精华,保持了故事的完整性,而且以更精练的文笔突出了人物的风采。
B.文章写孙权劝学,着重以孙权的劝说之言,来表现他的善劝,而略去吕蒙的对话,仅以“蒙辞以军中多务”一句写日蒙的反应,并仅以“蒙乃始就学”一句写吕蒙接受了劝说。
C.鲁肃与吕蒙论议,惊叹昌蒙今昔的变化“卿今者才略,非复吴下阿蒙”。
吕蒙以当之无愧的坦然态度,表明自己确实学识进步很快、很大。
鲁肃为之折服,与其“结友”。
D.文中鲁肃、吕蒙的对话,一唱一和,互相打趣,显示了两人的真实性情和融治关系,表明在孙权劝说下昌蒙“就学”的结果,从正面表现了昌蒙的学有所成,笔墨生动,是全文最精彩之处。
三、古诗文积累。
(8分)9.按要求填空。
(8分,每空1分)①春回大地,万象更新。
请默写歌咏春天的连续两句诗句:____________________②_________________________________,山入潼关不解平。
周练二
七年级数学周周练(二)一.精心选一选(每小题3分,共30分)1. -3的倒数是 ( )A 、-3B 、3C 、31D 、-31 2. 计算2-3的结果为( )A.-1B.1C.-5D.53. 数轴上原点以及原点右边的点所表示的数是 ( ) A 、负数 B 、非负数C 、正数D 、非正数4. 绝对值不大于4的所有负整数的和为( ) A 、0 B 、10 C 、-10 D 、-45. 下列说法正确的是 ( )⑴0是绝对值最小的有理数; ⑵相反数大于本身的数是负数; ⑶数轴上原点两侧的数互为相反数; ⑷两个数比较,绝对值大的反而小A 、⑴⑵ B、⑴⑶ C、⑴⑵⑶ D、⑴⑵⑶⑷ 6. 下列计算错误的是( )A. 0 -(-5)=5B. (-3)-(-5)=2C.234932-=⎪⎭⎫ ⎝⎛-⨯ D. (-36)÷(-9)=-4 7.已知下列各数:-8,2.1,19,3,0,-2.5,10,-1,其中负数有( )个. A 、2; B 、3; C 、4; D 、5.8. 实数a 、b 在数轴上的对应点如图所示,则下列关系式中错误..的是 ( ) A 、0ab > B 、0a b +< C 、1b< D 、0a b -< 9. 已知两个有理数a,b ,如果ab <0,且a+b <0,那么( )A 、a >0,b >0B 、a <0,b >0C 、a,b 异号D 、a,b 异a b 010. 下列图形都是由同样大小的棋子按一定的规律组成,其中第①个图形有1棵棋子,第②个图形一共有6棵棋子,第③个图形一共有16棵棋子,…,则第⑥个图形中棋子的颗数为( )二、耐心填一填(每小题3分,共30分)11.比较大小: 2 -3.(用“>”或“<”或“=”填空) 12. 计算:|-1-2|= .13.面粉厂运进200吨面粉记作+200,那么运出328吨面粉记作___ . 14.把下列各数填在相应的集合里: +5, -21, -20, 0, 0.74, -151, +3, -9.8, 241, 251整数集合: { ⋯}; 负分数集合:{ ⋯ }15.某种药品的说明书上标明保存温度是(20±2)℃,由此可知在 ℃至 ℃范围内保存才合适。
七年级语文上册周周练2
(2)这些素养在人际交往中起什么作用?(4分)
文明用语能使交往和谐,为人际关系增色。态度亲和能使我们增添 交往的魅力,拉近彼此之间的距离。举止端庄能反映我们高雅的气质, 反映我们的道德素养和文明程度。
遮bì( 蔽 )
3.补全下列短语。(3分)
翻来( 覆 )去 喜出( 望 )外 絮絮( 叨叨 ) 各得其( 所 ) 水波( 粼粼 ) 面面相( 觑 )Βιβλιοθήκη 4.文学常识填空。(12分)
(1)《秋天的怀念》选自《_史__铁__生__散__文__选__》,作者_史__铁__生__, 小 说代表作《我__的__遥__远__的__清__平__湾__》《_命__若__琴__弦__》,散文代表作 《_我__与__地__坛__》《__合__欢__树___》。
(2)《金色花》是__印__度__(国别)作家_泰__戈__尔_写的,他的主要诗集有 《____新__月__集____》《园丁集》《____飞__鸟__集____》《吉檀迦利》。
(3)冰心,原名___谢__婉__莹_,现当代作家,___诗__人___。著有诗集《繁 星》《___春__水___》。散文集《樱花赞》《寄___小__读__者_》。
我感动。我将把这一切视为最可贵的馈赠、最宝贵的 财富。
3.甲、乙两幅漫画都叫“朋友”,仔细欣赏,然后任选其中一幅, 说说画家想告诉我们什么。(4分)
我选择的是漫画_____,这幅漫画形象地告诉我们:___________。
我选择的是漫画甲。这幅漫画形象地告诉我们:朋友应当将心比心, 以诚相待。
我选择的是漫画乙。这幅漫画形象地告诉我们:朋友应当以礼相待, 互相支持,亲密无间。
(2)请写出与友情有关的古诗词。(至少两句)(2分) ①桃花潭水深千尺,不及汪伦送我情。 ②海内存知己,天涯若比邻。 ③劝君更尽一杯酒,西出阳关无故人。
四川省成都七中育才初一上数学《2024级第二周周练》试卷(Word版,无答案)
成都七中育才2024 级数学(七上)其次周周练卷(100 分)出题人:罗芳陈小利审题人:王山班级:姓名:学号:家长签字:A 卷(100 分)一.选择题。
(每小题3 分,共30 分)1. 下面几何体截面肯定是圆的是()A.圆柱B. 圆锥C. 球D. 圆台2.如图所示的图形绕虚线旋转一周,所形成的几何体是()3.某物体的三视图是如图所示的三个图形,那么该物体的形态是()(A)长方体( B)圆锥体(C)立方体(D)圆柱体4.如图,该物体的俯视图是()A B C D5.下列各个平面图形中,属于圆锥的表面绽开图的是()A B C D6.将右边的正方体绽开能得到的图形是()A B C D..7.下面形态的四张纸板,按图中线经过折叠可以围成一下直三棱柱的是()8.如图中是正方体的绽开图的个数是()A、2 个B、3 个C、4 个D、5 个19.某几何体的三种形态图如下所示,则该几何体可以是()从正面看从左面看从上面看10. 关于长方体有下列三个结论:①长方体中每一个面都是长方形;②长方体中每两个面都相互垂直;③长方体中相对的两个面是全等的长方形.其中结论正确的个数有()A.0 个B.1 个C.2 个D.3 个温馨提示:请将答案填在下表中。
二.填空题。
(每空4 分,共28 分)11.用一个平面去截长方体,截面是等边三角形。
(填"能"或"不能")12.假如一个六棱柱的一条侧棱长为5cm,那么全部侧棱之和为。
13.一个正方体的每个面都有一个汉字,绽开图如图所示,则在该正方体中和“值”字相对的字是。
14.如图,正方形ABCD 边长为2,以直线AB 为轴,将正方形旋转一周,所得圆柱的主视图(正视图)的周长是,俯视图的面积是。
(第13 题)(第14 题)15.桌面上放两件物体,它们的三视图如下图示,则这两个物体分别是。
16. 把立方体的八个角切去一个角后,余下几何体的棱共条(请写出全部可能的状况).17.现有棱长相等的十个小正方体堆成如图所示的几何体,要在编号为①、②、③、④四个小正方体中拿走其中两个小正方体,能使得该几何体的三视图仍不变更,则拿走的两个小正方体的编号是三.解答题。
七年级英语第二周周练
灌云县四队七中学年级第二周周练英语试卷(时间:45 分钟总分:120 分制卷人:朱艳)一、单项选择。
(每小题1分,满分20分)( ) 1. Mrs Smith lives next to us. She is really a good because she is always ready to help people around her.A. visitorB. waiterC. neighbourD. manager( )2. Would you like to help me _______ my Chinese?A. toB. onC. withD. for( )3. Wang Lei is a good student and he is always the first school in his class.A. to get toB. get toC. gets toD. to get( ) 4. . We plant trees in our hometown in spring every year.A. thousands ofB. thousand ofC. five thousand ofD.five thousands ( )5. --Simon, how old is your grandpa this year?-- . And we are planning a special birthday party for his birthday this Sunday.A. Ninetieth; ninetyB. Ninety; nientyC. Ninety; ninetiethD. Ninetieth; ninetieth ( )6. ________ Millie _______ me tomorrow? Yes, she is.A. Will; callB. Does; callC. Shall; callD. Is; going to call ( )7. “There is _________ in today's newspaper.”the father says to his son.A. anything interestingB. interesting anythingC. something interestingD. interesting something( )8. --When we go there tomorrow?--I meet you at 10 o'clock.A. do; willB. will; amC. shall; willD. shall; won't( )9. "Take this medicine and it will make you better soon," the nurse says to the sick boy.A. feelB. to feelC. feelingD. feels( )10. --Hello, may I speak to Millie, please? --________.A. Who are you?B. What's the matter?C. I'm Millie.D. This is Millie speaking.( )11. Would you like _______ some coffee?A. haveB. to haveC. havingD. had( )12. Here is a knife. You can ask your mother _______the apple.A. cutB. cutsC. to cutD. cutting( )13. _______ you ________ free next Sunday?A. Will; areB. Will; beC. Do; beD. Are; be( )14.There isn’t wrong with my computer.A . something B. anything C . some D. Any()15.His sister is a doctor.A oldB olderC olds D. elder( )16. Look! They _____________ an English lesson .A.having B.are going to have C.are having D.is going to have( )17. -- will the Greens stay in Xuzhou?--1 am not sure. Maybe in Jiali Hotel.A. WhereB. WhenC. WhichD. How long( )18. --Where do you sit, Peter?--I sit . .... Millie. She is just on my right.A. next toB. in front ofC. beforeD. behind( ) 19. The boy is ________ his father. He also _______ eating mangoes.A. likes; likeB. like ; likesC. like ; likeD. likes ; likes( ) 20. How do you say 15,858?A. Fifteen thousands, eight hundred and fifty-eightB. Fifteen thousand, eight hundreds and fifty eight.C. Fifteen thousand, eight hundred and fifty-eightD. Fifteen thousand and eight hundred and fifty-eight.二、完形填空。
七年级周周练 第二周
七年级周周练第二周“我们避免不了灾难,我们却能做好自己。
”共勉!一、填空:1.如果162=x ,那么_____=x ;2.144的平方根是______,64的立方根是_______;3._____2516=±,_____814=-,____104=,_____106=-;4._____8333=,_____643=--;5.近似数53.1510⨯精确到位,有个有效数字。
6.5-的相反数是__________,绝对值是_________,倒数是_________;7.化简:8125=,810--=;8.____________数和数轴上的点一一对应;9.=0144.0_________;=-327102__________;__________,=⎪⎪⎭⎫ ⎝⎛-2323____________,()()_______2525=+-;10.比较大小5-______6-,213-______21;二、选择题:11.81的平方根是()A.9 B.±9C.3D.±312.下列说法正确的是()A.无限小数都是无理数B.带根号的数都是无理数C.开方开不尽的数是无理数D.π是无理数,故无理数也可能是有限小数13.立方根等于本身的数是()A.–1B.0C.±1D.±1或014.ππ--14.3的值是()A. 3.14-π2B. 3.14C.–3.14D.无法确定15.a 为大于1的正数,则有()A.a a = B.a a > C.a a < D.无法确定16.16的正的平方根的平方根是()A 4±B 4C2±D 217.下列运算中,错误的是()①1251144251=,②4)4(2±=-,③22222-=-=-,④2095141251161=+=+A 1个B 2个C 3个D 4个18.2)5(-的平方根是()A 5±B 5C 5-D 5±19.下列运算正确的是()A 3311--=-B 3333=-C 3311-=-D 3311-=-20.若a 、b 为实数,且471122++-+-=a a a b ,则b a +的值为()A 1±B 4C 3或5D 5三、解答题:21.已知322+-+-=x x y ,求x y 的平方根;22.(1)22)32()32(-++(2)102121()52(21(1)2(2--+--++-23.观察下列分分母有理化的计算:12121-=+,23231-=+,34341-=+,45451-=+...从计算结果中找出规律,并利用这一规律计算:(121++231++341++...+200120021+)(12002+);。
江苏省无锡市宜兴市七年级数学上学期第2周周练试卷(含解析)新人教版
2016—2017学年江苏省无锡市宜兴市七年级(上)第2周周练数学试卷一、填空题(本大题共有10小题,每小题2分,共计20分.)1.数 3,﹣0.2,1,0,,中,负数有个,正数有个.2.如果向北走8km记作+8km,那么向南走5km记作;如果运进粮食3t记作+3t,那么﹣4t表示.3.下列各数:﹣7,10.1,3。
2121121112…,89,0,﹣0.67,1,π,其中,分数有,无理数有.4.离原点5个单位长度的点有个,它所表示的有理数是.5.在数轴上表示的两个数中,的数总比的数大.6.用“>”或“<”填空:|﹣3.5|3;﹣﹣.7.2的相反数是,﹣(﹣2)= .8.|+4|= , 的绝对值为3.9.两个同号的数中,较小的负数所表示的点离原点较,较小的正数所表示的点离原点较.(填“近”或“远")10.观察这一列数:﹣,,﹣,,﹣,,依此规律下一个数是.二、选择题(本大题共有12小题,每小题3分,共计36分.)11.下列各数中是正整数的是( )A.﹣1 B.2 C.0.5 D.12.下列结论中正确的是()A.0既是正数,又是负数B.O是最小的正数C.0是最大的负数 D.0既不是正数,也不是负数13.一架战斗机所在的高度为+200m,一艘潜艇的高度为﹣50m,则战斗机与潜艇的高度差为()A.250m B.350m C.﹣250m D.﹣350m14.下列各组数中,互为相反数的是()A.2和﹣2 B.﹣2和C.﹣2和D.和215.在数﹣7,+1。
2,,0。
16,+3,﹣1.6中,整数有( )A.1个B.2个C.3个D.4个16.如图,在数轴上点A表示的数可能是( )A.1。
5 B.﹣l.5 C.﹣2。
5 D.2。
517.如下列分数中,能化为有限小数的是()A.B.C.D.18.在、0、1、﹣2这四个数中,最小的数是( )A.B.0 C.1 D.﹣219.实数a、b在数轴上的位置如图所示,则a与﹣b的大小关系是( )A.a>﹣b B.a=﹣b C.a<﹣b D.不能判断20.农工商出售的某种品牌的面粉袋上,标有质量为(25±0.2)的字样,从中任意拿出两袋,它们的质量最多相差()A.0。
七年级英语第2周周练试题
宁化城东中学2021-2021学年七年级英语第2周周练试题一.制卷人:打自企; 成别使; 而都那。
审核人:众闪壹; 春壹阑; 各厅…… 日期:2022年二月八日。
二. A.字母书写(要有大小写,书写工整) (15分〕B. 大小写字母互改。
(5分)1. BEGIN2. LATER3. NAME4. nice5.teacherC.按字母顺序,填写上所缺字母(注意大小写要一致). 〔6分)1.S,T2.N,P3.Q S,4. l,m5. w,x6.h j二.词汇。
(14分〕1.中国____________2.欢送_____________3.好的,漂亮_____________4.也______________5.这个_____________6.教师___________________A-G A-G H-N O-T U-Z7.下午____________ 8.再见_____________ 9.后来___________________ 10.我的_____________ 11.相识,遇见_________12.黄昏__________________13.安康的,美妙的_______________ 14.看到,明白____________三.单项选择。
(15分〕( )1. 以下字母中一笔写成的是 ____。
A. pB. tC. m( )2.以下各组字母中含有一样读音的一组是 ____。
A. H, AB. H, IC. L, Y( ) 3.以下各组字母中含有一样读音的一组是 ____。
A. H, FB.F, LC. L, K( )4. 以下字母书写格式正确的选项是 ____。
A. B. C.( )5. 以下各组字母中全部是元音字母的是 ____。
A. a, e, o, rB. a, i, u, eC. o, u, e, n( )6.—Welcome to Beijing! —____A. Welcome to Beijing, too.B. Thank you.C. Fine, thank you. ( )7. Mom, this is my teacher, Miss Lin. Miss Lin, ____A. thank you.B. how are you?C. this is my mom.( )8. —____ —Fine, thank you.A. How do you do?B. How are you?C. Are you Mr. Wang? ( )9.——How do you do? ------__________________________?A. Nice to meet youB. How are youC. How do you do( )10. Hello!Are you Wei Hua?----------____________________________A. My name is AnnB. Yes, I am notC. No, I am not( )11. —____ you Mingming? —Yes, I ____.A. Are; areB. Am; amC. Are; am( )12. 当别人帮助了你, 你应该说 ____A. OK.B. Nice to meet you.C. Thank you.( )13. Goodbye, Mr. Cheng. ---________________A. Thank youB. ByeC. Fine, thanks( )14. Ms.Wang, see you later. ----___________________A. See youB. Thank youC. Fine( )15.Is Miss Zhang fine? _________A. Yes, she is.B. Yes, she isn’t.C. No, she is.四.情景交际。
苏科版七年级上册数学第2周周练试题(B02).docx
满分值 时 间 制 卷 审 核 得 分 100分45分钟陈建兵潘明1. 3-的绝对值是 ( ) A .-3 B .13- C .3 D .3± 2. 下列一组按规律排列的数:1、21、41、81、161……第2007个数应是 ( ) A.(21)2007 B.(21)2006 C.(21)2008D. 以上都不对3. 某粮店出售的三种品牌的面粉袋上,分别标有质量为(25±0.1)kg ,(25±0.2)kg ,(25±0.3)kg 的字样,从中任意拿出两袋,它们的质量最多相差 ( ) A. 0.8kg B. 0.6kg C. 0.5kg D. 0.4kg4. 如图数轴上的A 、B 两点分别表示有理数a 、b ,下列式子中不正确的是 ( )A. a + b < 0B. a –b < 0C. (-a )+b > 0D. b > a5. 已知4个矿泉水空瓶可以换矿泉水一瓶,现有18个矿泉水空瓶,若不交钱,最多可以喝矿泉水 ( )A. 4瓶B. 5瓶C. 6瓶D. 7瓶 6. 法国的“小九九”从“一一得一”到“五五二十五”和 我国的“小九九”是一样的, 后面的就改用手势了。
下面两 个图框是用法国“小九九”计 算7×8和8×9的两个示例。
若用法国“小九九”计算7×9,左、右手依次伸出手指的个数是: ( ) A. 2,3 B. 3,3 C. 2,4 D. 3,4二、填空题(本题包括5小题,每小题5分,共25分,把正确答案写在横线上) 7. 盈利—8%的实际意义是________________________. 8.已知a =3-,那么a = .9. 绝对值大于3且小于6的所有整数是 .10. 某数轴的单位长度是1cm ,若在这个数轴上画出一条长2014cm 的线段,则这条线段盖住的整数点的个数是 . 11. 已知数轴上有A 、B 两点,点A 与原点的距离为2, A 、B 两点的距离为1.5,则满足条件的点B所表示的数是 .三、计算题(本题包括4小题,共51分)12.(本题10分)请你把21-,2, |-1.5|, 0,3-这五个数按从小到大顺序,从左到右串个糖葫芦,把数填在“○”内,再把这五个数的绝对值...在数轴上表示出来。
七年级数学下册第二学期第2周周练试卷.docx
七年级数学下册第二学期第2周周练试卷分值一100 得分 ____________一.选择题(每小题3分,共24分)1.下列图形中,Z1与Z2是同位角的是()2.如图,下列说法正确的是(A、Z2和Z4是同位角C、Z1和ZA是内错角3.如图所示,直线曰、血被直线c所截,现给出下列四种条件:①Z2=Z6②Z2=Z8③Z1+Z4二180°④Z3二Z8,其屮能判断是a//b的条件的序号是()A.①②B.①③C.①④D.③④5.下列现彖:①电梯的升降运动,②飞机在地面上沿直线滑行,③风车的转动,④冷水加热过程中气泡的上升。
其中属于平移的是()A、①②B、①③C、②③D、③④6.小李冇2根木棒,长度分别为10cm和15cm,要组成一个三角形(木棒的首尾分别连接),B、Z2和Z4是内错角D、Z3和Z4是同旁内角5. 仍在原来的方向上平行行驶前进,那么这两次拐弯的()A.第一次向右拐40°B.笫一次向左拐40。
C.第一次向左拐40°D.第一次向右拐40°角度应该是,第二次向左拐140。
,笫二次向左拐40°,第二次向左拐140°,第二次向右拐40°4•如图,已知a//b,tLZ2是Z1的2倍,那么Z2的度数为(-辆汽卒在笔直的公路上行驶,两次拐弯后,第11题笫12題还需在下列4根木棒小选取(A、4cm长的木棒B> 5cm长的木棒C、20cm长的木棒D、25cm长的木棒7.要求MAABC的边AB上的高,下列画法中,正确的是( )(A)_ (B ) (C)(D)8.如图,在ZXABC匚P,ZABC=ZACB, ZA二40° , P 是ZXABC 内一点,且Z1=Z2,则ZBPC等于( )(A)110°(B) 120°(C)130°(D) 140°二填空题(每小题4分,共28分)9.如图:(1) Z1与Z2是直线被总线所截成的角;(2) Z2与ZC是直线、被直线所截成的角;(3) Z3与ZC是玄线、被肓线所截成的角.10.如图:(1)若ZA=Z3,贝I」// ,理由是(2)若Z2=ZE,贝ij //,理由是(3)若 Z A+ Z ABE= 180°,则_//_,理由是______________________________11.如图,如果AB//CD,根据____________________________________ 町得Z1=ZCDE,根据 _____________________________________________________ ,可得Z1=ZBDF;根据 ________________________________________________ ,可得Z1+ _____ =180° .12.如图,直线a//b, Zl=45°,则Z2二 ________ ° , Z3二 ____ ° .13.如图,Z1=Z2, Z3=100° ,则Z4二____________ ° .B D R g14.如图,EG//AB, FG//DC, ZB二100° , ZC=120°,则ZEGF二___________15.如图,AB//CD,请你添加一个条件____________ ,使ZABE=ZDCF三.解答题(,共48分)16.如图,AB//CD, ZA=ZD.判断AF与ED的位置关系,并说明理由.(12分)17.如图,AD//EF, Zl+Z2=180° . Z1 与ZBAD相等吗?为什么? (12 分)18.如图,AD 是ZEAC 的平分线,AD//BC, ZB二64°,求ZEAD、ZDAC、ZC 的度数。
七年级英语第二周周练试题试题
宁化城东中学2021-2021学年七年级英语下学期第二周周练试题〔无答案〕牛版本卷贰O贰贰年贰月捌日编写;出题人:令狐学复;欧阳化语;令狐理总。
Ⅰ.词汇局部。
〔一共35分〕A根据汉语意思写出单词。
〔20分〕_____ ___ ___________ 6.乏味的,无聊的_________7.(向别人)借用___ ______ _____10.过程,课程______ ___ 11.写,写作_____ __ _________ ___ 15.精彩的,美妙的______ _16.报纸______ _____ 18.贺片____ _________20.制造,做_____ _____(B)汉译英。
(10分)1. You must return the books to the library _______________(按时).2. He has ________________ knives . (一些,几个)3. Sally is cleaning the blackboard ________________________(在...的后面)the classroom.4. ---______________ does he watch TV ?(多久一次) ---Every day .5 Mr . White is playing basketball with classmates(在操场)(C)根据句意,从方框中选择适宜的单词或者词组并用其适当形式填空。
(5分)1.Many students ____________ Ren’ai Project English workbooks now. They’rehelpful(有帮助的) for them to study English well.2.Here is a ___________ of our town(城镇). It looks beautiful.3.There are many books on these ____________ .4.—How long can I ___________ the book? —Two weeks.5.—Where is Mom? —She ___________________the house.II.单项选择。
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初一数学周周练2(有理数单元)
班级________学号_______姓名_________得分_________
一、选择题(每小题2分,共16分) 1. -
2
1
的相反数是( ) A .21 B .2
1
- C .2 D .-2
2. 地球绕太阳每小时转动经过的路程约为110000米,将110000用科学记数法表示为( ) A .11×104 B .0.11×107 C .1.1×106 D .1.1×105 3.下列计算正确的是 ( )
A .一332⎛⎫ ⎪⎝⎭=-627
B .一223⎛⎫ ⎪⎝⎭=49
C .-323⎛⎫ ⎪⎝⎭=827
D .-3
35⎛⎫
⎪⎝⎭
=-27125
4.有四包洗衣粉,每包以标准克数(500克)为基准,超过的克数记作正数,不足的克数记作负数,以下数据是记录结果,其中表示实际克数最接近标准克数的是( )
A .-6
B .+7
C .-14
D .+18
5.一位“粗心”的同学在做加减运算时,将“-5”错写成“+5”进行运算,这样他得到的结果比正确答案( ) A .少5 B .少10 C .多5 D .多10 6. 与算式22+22+22+22的运算结果相等的是( ) A .24 B .82 C .28 D .216
7. 下列说法正确的有( )
(1)任何一个有理数的平方都是正数; (2)无理数是无限小数;
(3)- a 不一定是负数 (4)符号相反的两个数互为相反数. A .1个 B .2个 C .3个 D .4个 8. 如图,数轴上的点A ,B 分别对应有理数a ,b ,下列结论正确的是( )
A .a >b
B .|a |>|b |
C .-a <b
D .a +b <0 二、填空题(每空2分,共24分)
9. 绝对值小于π的非负整数是 .平方等于它本身的数是 . 10. 计算|3.14 -
π|- π的结果是
11. 比较大小:﹣0.3__________
.
12. 若a <0,b <0,c >0,则a +b
c 0. 13. -9
1519
×15= ; -11
108125.0⨯=
14. 若|a |=2,b =-3,c 是最大的负整数,则a +b -c = 15. 如果a =a ,则a 是 数.
16. 如果|x +8|=5,那么x = .
17. 已知a <b |,0ab <,且0a b +>,则a b (用不等号连接)
18. 下列判断中:(1) 两个数比较,绝对值大的反而小; (2)若b a >,则一定有b a >; (3) 若b a =,则一定有22)(b a -=;(4) 若b a =,则一定有b a =;
(5)互为倒数的两数符号相同;(6)几个有理数相乘,当负因数有奇数个时,积为负; 其中正确的是 (填序号) . 三.解答题
19. 计算(每小题4分,共32分) (1) ()⎪⎭
⎫
⎝⎛-++-+-1112548.51110 (2) 61321546514313÷⨯-÷-
(3) 1737
(1
)(1)78412
-⨯-+- (4) 6])2(3[134÷----
(5)521)21(212)75(75211÷-+⨯--⨯ (6) )3
17192143(631-+-÷-
(7) 2
24
1
(10.5[2]3
)(4)1
--⨯⨯--- (8)()()19
23212257253
---÷⎪⎭
⎫ ⎝⎛--+⨯-
20.(6分)把下列各数的序号填在相应的大括号里: ①﹣(﹣7);②-18% ; ③-
45
; ④0 ; ⑤
56
; ⑥-3.2 ;⑦28 ; ⑧-22 ; ⑨3
π
-
; ⑩0.3030030003…;
正整数集合:{ …}; 负分数集合:{ …};
无理数集合:{ …}.
21.(4分)结合数轴解答:若m >0,n <0,n >m ,用“<”号连接m ,n ,n ,-m .
22.(5分)阅读材料:对于任何有理数,我们规定符号⎪⎪
⎪⎪
⎪⎪
a c b
d 的意义是⎪⎪
⎪⎪
⎪⎪a
c b
d =ad -bc .
例如:⎪⎪⎪⎪⎪⎪
1 23
4=1×4-2×3=-2,⎪⎪⎪⎪
⎪⎪
-2
43 5=(-2)×5-4×3=-22. (1)按照这个规定请你计算⎪⎪
⎪⎪
⎪⎪
5 -4-3 -2的值;
(2)按照这个规定请你计算:当|x -2|=0时,⎪⎪⎪⎪
⎪⎪
3 7x 2 2x -6的值.
23.(5分)某摩托车厂本周内计划每日生产350辆摩托车,由于工人实行轮休,每日上班人数不一定相等,实际每日生产量与计划量相比情况如下表 (增加的车辆数为正数,减少的车辆数为负数):
(1) 本周产量最多的一天比产量最少的一天多生产了多少辆? (2) 本周实际平均每天生产了多少辆摩托车?
24. (4分)已知a =5,29b =, 若a b b a -=-, 求a b +的值.
25. (4分)已知A ,B 在数轴上分别表示数a ,b .
(1) 对照数轴填写下表:
(2) 试用含a ,b 的式子表示A ,B 两点间的距离为 ;
(3) 若点P 表示的数为x ,则当点P 在数轴上什么位置时, 3x ++4x -的值最小?
最小值是多少?。