EEC初二上错题(带答案)
苏科版八年级上册数学期末易错试题汇总(含答案)
苏科版八年级上册数学期末易错试题汇总（含答案）一、选择题1．摩托车开始行驶时，油箱中有油4升，如果每小时耗油0.5升，那么油箱中余油量y （升）与它工作时间t （时）之间函数关系的图象是（ ）A ．B ．C ．D ．2．下列四个实数：223,0.1010017π，3,，其中无理数的个数是（ ） A ．1个B ．2个C ．3个D ．4个3．若b ＞0，则一次函数y =﹣x +b 的图象大致是（ ）A ．B ．C ．D ．4．如图,将边长为1的正方形OABC 沿x 轴正方向连续翻转2020次,点A 依次落在点1A 、2A 、3A 、4A …2020A 的位置上,则点2020A 的坐标为（ ）A ．2019,0（）B ．2019,1（）C ．2020,0（）D ．2020,1（）5．若2149x kx ++是完全平方式，则实数k 的值为（ ） A ．43B ．13C ．43±D ．13±6．20.3•、227-38（ ）A ．1个B ．2个C ．3个D ．4个7．已知点M (1，a )和点N (2，b )是一次函数y =－2x ＋1图象上的两点，则a 与b 的大小关系是( ) A ．a ＞bB ．a =bC ．a ＜bD ．以上都不对8．在平面直角坐标系中，把直线34y x =-+沿x 轴向左平移2个单位长度后，得到的直线函数表达式为（ ） A ．31y x =-+B ．32y x =-+C ．31y x =--D ．32y x =--9．下列交通标志图案是轴对称图形的是（ ）A ．B ．C ．D ．10．在平面直角坐标系xOy 中，线段AB 的两个点坐标分别为A （﹣1，﹣1），B （1，2）．平移线段AB ，得到线段A ′B ′．已知点A ′的坐标为（3，1），则点B ′的坐标为（ ） A ．（4，4）B ．（5，4）C ．（6，4）D ．（5，3）二、填空题11．已知实数x 、y 满足|3|20x y ++-=，则代数式()2019x y +的值为______.12．在平面直角坐标系中，点A （2，1）向左平移3个单位长度，再向下平移4个单位后的坐标为______． 13．4的平方根是 ．14．如图，在ABC ∆中，90C =∠，AD 平分CAB ∠，交BC 于点D ，若ADC 60∠=，2CD =，则ABC ∆周长等于__________．15．等边三角形有_____条对称轴．16．如图，在Rt ABC △中，90B ∠=︒，30A ∠=︒，DE 垂直平分斜边AC ，交AB 于D ，E 是垂足，连接CD ，若1BD =，则AC 的长是__________．17．在平面直角坐标系中，把直线y=-2x+3沿y 轴向上平移两个单位后，得到的直线的函数关系式为_____．18．等腰三角形的两边长分别为5cm 和2cm ，则它的周长为_____． 19．一次函数y ＝2x －4的图像与x 轴的交点坐标为_______．20．如图，在△ABC 中，∠ABC 和∠ACB 的平分线相交于点F ，点点F 作DE ∥BC ，交AB 于点D ，交AC 于点E 。
EEC八年级上期中测试卷
EEC八年级上期中测试卷总分：120分时间：100分钟命题人：祝佳欢一、听力测试（本题共 30 分）听录音, 每题读两遍。
（一）、听句子，选出与所听句子相匹配的图画。
(本题共 5分。
每小题1分)二、听对话及问题，选择最佳答案。
(本题共10分，每小题2分)6. A. Alice. B. Lucy. C. Jane.7. A. A house. B. A letter. C. A postcard.8. A. The girl's friend. B. The girl's neighbor. C. A and B.9. A. Never keep in touch with John. B. Write e-mails to John. C. Call John.10. A. Saw a movie. B. Read a book. C. listened to music.三、听对话，根据问题选择最佳答案。
(本题共5分。
每小题1分)11. The boy was ________ at that time last night.A. surfing the InternetB. practicing the pianoC. helping his mother12. Lisa's mother wanted to find some information about a person________ on the Internet.A. with handicapsB. who helped people with handicapsC. who overcame a handicap13. The boy has been learning the piano for ________ years. A. four B. five C. six14. The boy's father is a ________.A. pianistB. teacherC. doctor 15. The piano contest is on ________. A. Friday B. Saturday C. Sunday四、根据所听短文内容，选出短文中出现的词的同义词或同义词组。
初二英语上册错题精选及分析（可编辑）
初二英语上册错题精选及分析英语错题精选Part A1.Meimei helps Lanlan ______ her homework onSaturday 。
A.doB.doseC.doingD.is doing这里的主语是Meimei 还是Meimei和 Lanlan2.What _____ your sister doing thereA.are B.dose C.do D.is3.Mary is going to help her mother _____the cooking this afternoonA.toB.inC.forD.with4.My kite is______than yours in the skyA.very high B.much high C.very higher D.much higher1.A.do固定搭配:help sb to do 其中to 可以省略,do是用原形还有一个结构是:help sb. with sth主语是Meimei ,Lanlan是help宾语2.D.is由句子意思知道用进行时你姐姐在那里干什么?由于是单数所以用is不用are不可以用B.dose或C.do 进行时结构就是: be+现在分词3.D.with前面讲到了 help sb. with sth. 这里的 cooking 不是动词的现在分词而是名词,解释为: 烹饪4.D.much higher看到than 就知道要用比较级very 不能和比较级连用可以和原形连用和much一样可以和比较级连用的词语还有: a lot, a little, a bit, far,rather,still even等Part B一、根据句意及首字母写出单词1、Are you b______ todayNO ,I have nothing to do。
2、M_______is the second day of a week。
牛津译林英语八年级上册易错单选100道(含答案)
牛津译林英语八年级上册期末易错单选100道（含答案）1．The toy animals are as lovely as________.（）A．the real those B．the true onesC．the real ones D．those real2．﹣﹣﹣Who teaches ________ English？﹣﹣﹣Nobody. I teach ________.（）A．your；me B．you；myselfC．your；mine D．yours；my3．She is ready to help people ________.（）A．any time B．every time C．some time D．sometime4．There isn't ________ with your bike. You can ride it to school.（）A．wrong anything B．something wrongC．anything wrong D．wrong something5．I often feel _____ at home because I don't have anything to do．（）A．boring B．bored C．happy D．unhappy 6．﹣Would you please not smoke here？Look at the sign．﹣________．（）A．No，I will B．Yes，I willC．Sorry，I will D．Sorry，I won't 7．Glad to see you here! Today you look ________ better.（）A．little B．a little C．less D．very 8．The weather is becoming_______．（）A．hotter and hotter B．more hot and hotC．hoter and hoter D．more and more hot 9．What ________ honest boy!And he is _______best student in our class．（）A．a，a B．a，the C．an，the D．the，the 10．Her English is very good，and her French ________ her English.（）A．is as good as B．is as well asC．isn't as good as D．is as better as 11．The weather in Harbin in winter is colder than ________ in Gangdong.（）A．that B．it C．this D．one 12．Tom is stronger than ___ in his class．（）A．any other teenager B．any teenagersC．any teenager D．other teenagers13．I'm sure you __________drive a car next month．（）A．will can B．will be able toC．are able to D．could14．﹣What makes you so today，Jack？It is your first day of school．﹣Because my teacher says I am honest boy．（）A．happily；an B．happily；aC．happy；a D．happy；an15．We can ________ books from home，but we have to tell our teacher ________．（）A．bring in；what are we readingB．bring in；what we are readingC．bring；what we readingD．take；what to read16．Boys and girls，listen carefully．I have ________ to tell you．This term，we will have ________ new students．We will have more fun studying together．（）A．else something；another twoB．else something；two moreC．something else；two anotherD．something else；two more17．What's wrong with her？She feels _______．I don't know ___________．（）A．comfortably；how to doB．uncomfortably；to do whatC．uncomfortable；what to doD．uncomfortable；what can I do18．﹣﹣﹣Hey，guys．Do you often have a good time ________ after﹣school activities？﹣﹣﹣Of course，we do．And we always have a lot of time ________ soccer．（）A．to do；to practice B．doing；practicingC．to do；practicing D．doing；to practice 19．There is a park on one side of the road and a shopping mall on ________．（）A．other B．another C．the other D．others 20．﹣﹣﹣What ______ your Chinese teacher ______？﹣﹣﹣He is tall and thin．（）A．does；like B．is；like C．do；like D．will；like21．Thank you very much for ____ me．You are so kind．（）A．come to see B．coming to seeC．coming seeing D．come to seeing22．If you live near the shopping mall，you _______ go far to buy things．（）A．have to B．don't have toC．haven't to D．needn't to23．﹣I'm sorry，Mrs．Black．I my physics homework at home．﹣Don't forget it to school tomorrow．（）A．left；to bring B．forgot；to takeC．lost；to bring D．left；to take 24．Lily is flying to France．Soon she will arrive ____ Paris ____ the morning of July 9th．（）A．at；in B．in；on C．in；in D．on；on 25．It only ______ him 20minutes ______to his office every day．（）A．takes，to drive B．took，driveC．takes，drive D．took，to drive26．﹣﹣Why are you so tired these days？﹣﹣Well，I have ________ work to do．（）A．too much B．too many C．much too D．many too27．Lily isn't as as Peter．She often makesmistakes in her composition．（）A．careless B．careful C．carelesslyD．carefully28．﹣____ is the bridge？﹣It's 60 feet wide．（）A．How soon B．How wide C．How far D．How long29．There were ____ friends of his in the room．So he left．（）A．few B．a few C．little D．a little 30．______ exciting news it is!（）A．What B．What an C．How D．How an 31．Class is beginning．Please stop ____．（）A．talking B．to talk C．talk D．talks 32．The doctor warned him，"If you _______________ like this，you'll make yourself seriously ill．（）A．will go on to smoke B．go on to smokeC．go on smoking D．will go on smoking 33．You should make a good plan ___________ you do anything important．（）A．though B．until C．after D．before 34．You must be very excited about going to CambridgeUniversity．___________，but I am worried about my spoken English．（）A．I'm sorry B．Certainly notC．I don't know yet D．Well，I should be 35．I have many hobbies，____ swimming，rowing and hiking．（）A．for example B．such asC．after all D．first of all36．﹣She didn't make great progress，did she？﹣，although she did her best．（）A．so；No B．so；Yes C．such；No D．such；Yes37．﹣﹣﹣Don't give the birds anything to eat when you are in the zoo．﹣﹣﹣_______．（）A．No，I don't B．Yes，I do．C．Yes，I will D．No，I won't 38．Don't make any noise，________？（）A．do you B．don't you C．will you D．won'tyou39．Let's go and play badminton，_______？（）A．will you B．shall we C．do you D．won'twe40．Of the three foreign guests，one is from London，_______ two are from New York．（）A．other B．the other C．another D．some other41．You'd better here the heavy rain．（）A．not to leave；becauseB．not leave；becauseC．not leave；because of42．﹣Jim，can you _______ this word in Chinese？﹣Yes，I can_______ a little Chinese．（）A．speak；say B．say；speakC．tell；speak D．talk；say43．The girl，the writer of The Diary of a Young Girl，_______________ Annie Frank．（）A．was named B．namedC．was named after D．names44．We all know that Changjiang River is ___________ longer than ___________ in China．（）A．much；any other riverB．much；any riverC．no；any other riverD．more；any river45．﹣Jim，look at your bedroom．It's in such a mess．﹣Sorry，Mum．I'll ___________ at once．（）A．tidy up B．get up C．take up D．pick up 46．﹣What did the policeman say to you，Liu Ying？﹣He told me ______ my purse in the bicycle basket．It's too dangerous．（）A．not put B．to put C．don't put D．not toput47．﹣What shall we do now？﹣__________ it's raining hard，let's stay at home．（）A．So B．Since C．HoweverD．Otherwise48．﹣Vivian，isn't the film boring？﹣__________．I nearly fell asleep during the first 30 minutes．（）A．Yes，it isn't B．Yes，it isC．No，it isn't D．No，it is49．﹣Did you buy anything on Double Eleventh Festival？Things were much cheaper than usual．﹣at all．I have no interest in online shopping．（）A．None B．Nothing C．Not D．No 50．﹣I don't think keeping pet dogs is a good idea．They cause us a lot of trouble．﹣______．Sometimes keeping pets can help us become more caring．（）A．You are right B．Not reallyC．That's a good idea D．No problem51．It is important ____ people ____ learn team spirit．（）A．of，of B．of，to C．for，to D．to，to 52．We'll find it difficult to learn English ____．（）A．at the begin B．the beginningC．to the beginning D．in the beginning 53．The poor man really wanted to have somewhere _______ and luckily a person gave him a room _______．（）A．to live；to liveB．to live；to live inC．to live in；to live inD．to live in；to live54．﹣_______ did you weigh when you were born？（）﹣My mother says I weighed only 2 kilograms at birth．A．What B．How much C．How many D．How heavy55．After we came into the house，we found him lyjng on the ground with his mouth_______ and eyes _______．（）A．open；close B．opened；closedC．opened；close D．open；closed 56．﹣May I _______ the magazine for a week？（）﹣Of course you can．A．borrow B．leave C．get D．keep 57．﹣Are there any tomatoes in the fridge？﹣_________．（）﹣What's in the fridge then？﹣_____________．A．Nothing，None B．None，NothingC．None，None D．Noting，Nothing 58．Do you write a report ______an animal______ danger for the club？（）A．about；on B．on；in C．to；from D．in；with59．The number of wild lions in Africa （非洲）_________ much smaller than before．（）A．is B．are C．has D．have 60．This is a _______zebra．It looks lovely．（）A．ten﹣months﹣old B．ten months oldC．ten﹣month﹣old D．ten﹣month old 61．﹣My mobile phone dropped into the water when I was walking along the river bank．（）﹣_________！A．Great B．What a pityC．Sounds good D．Lucky you62．﹣Is David coming to Rugao by train？﹣He should，but he ______ not．He likes driving his car．（）A．can B．need C．must D．may 63．Some teenagers don't like to talk with their parents，but I am ______ them．I love to talk with my parents．（）A．the same as B．different fromC．pleased with D．interested in 64．Could you please speak a little more ________？I can't follow you．（）A．slowly B．slow C．quick D．quickly 65．﹣I missed the beginning of The V oice of China yesterday evening．﹣!But you can watch the re﹣play tonight．（）A．Hurry up B．What a pityC．Try your best D．I don't think so 66．﹣﹣﹣It snowed heavily last night．Is everyone in our class here today？﹣﹣﹣Yes，and _______ of us was late for school this morning．（）A．none B．neither C．all D．either 67．Hong Kong is ____ the south of China，and Macau is ____ the west of Hong Kong．（）A．in，to B．to，to C．to，in D．in，in 68．You can take a notebook to ____ what you see．（）A．write up B．write down C．write toD．write69．People should be kept from ____ the rubbish ____ the river．（）A．throw；away B．throw；intoC．throwing；away D．throwing；into70．I visited many places of interest during my ____ in Suzhou．（）A．stayed B．stay C．to stay D．staying 71．﹣____ should we take？﹣You'd better take some water．（）A．Which else B．How else C．Who else D．What else72．You will be late for school________ you don't get up early．（）A．but B．if C．and D．or 73．The Yangzhi River is one of __________ in the world．（）A．the longest rivers B．the longest riverC．longer rivers D．longer river74．﹣﹣﹣What are you going to do when you grow up？﹣﹣﹣A singer，but my parents wish me _________ a teacher．（）A．am B．to be C．will be D．be 75．A lot of famous doctors gathered in Harbin _________ save"China's most beautiful teacher"﹣Ms Zhang Lili．（）A．so that B．in order toC．in order that D．as a result76．I don't know _______ say_______ the poor young man up．（）A．how to；to cheer B．what to；cheeringC．how to；cheering D．what to；to cheer 77．This kind of watermelons looks______ and sells______in the market（）A．well；good B．good；goodC．good；well D．well；well78．They are busy ____ the football game between China and the US now．（）A．watched B．watch C．to watchD．watching79．I don't know if he______．If he _____ tomorrow，I'll call you．（）A．will come；comes B．comes；will comeC．will come；will come D．comes；comes 80．Lucifer sings_______ than I，but he doesn't sing_______ my sister．（）A．worse，as better as B．worse，as good asC．better，as good as D．better，as well as81．﹣What happened to Mark？﹣He fell ____ the bike ____ a snowy morning．（）A．off；in B．down；at C．off；on D．down；in82．﹣﹣Please give Alice the story book_____you see her．﹣All right．（）A．unless B．or C．but D．if83．﹣﹣Are you ________ of the dark？﹣﹣﹣Yes，so I always go to sleep with my bedroom lights________．（）A．worry；on B．worried；onC．afraid；on D．fear；off84．I don't have white shoes for tomorrow's speech contest．My brother has pair．Would you like to try on？（）A．a；it B．one；it C．one；themD．two；them85．﹣Do you know if she ____ to visit us？﹣I think she will come if she ____ free tomorrow．（）A．comes，is B．will come，isC．comes，will be D．will come，will be 86．To protect the endangered animals，____，we should build more nature reserves．（）A．first of all B．as a resultC．so far D．in the end87．It heavily when I left school yesterday．（）A．was snowing B．is snowingC．snowed D．is snowy88．I saw some boy students basketball when I passed the playground．（）A．played B．plays C．playing D．to play 89．The government of Linyi is building ______ cheap and good houses for the people．（）A．thousand B．thousandsC．thousand of D．thousands of 90．The man tried several times to start the car，and he succeeded ．（）A．in the past B．in the endC．at first D．at once91．﹣What should I do when the earthquake happens，Dad？﹣First of all，it's important to_____and hide yourself in the corners of the room．（）A．calm down B．put down C．getdown D．fall down92．After the earthquake，I didn't know _______ next．（）A．what to do B．how to do C．do what D．to do what93．﹣How many comic books are there in your bookshop？﹣__________．Our bookshop only sells computer books．（）A．No one B．Nothing C．Nobody D．None 94．The underlined part of the sentence "The news made us all surprised．" is __________．（）A．P B．IO C．DO D．OC 95．﹣Could you help us ______ some Christmas lights，Jimmy？﹣No problem．It's a good idea to set an exciting feeling with colored lights．（）A．put in B．put up C．put out D．put on 96．On seeing the squirrel，Nancy felt a little afraid．Soon，she______because it lookedlovely．（）A．came down B．calmed downC．fell down D．put down97．The sentence structure of "The leaves all turn yellow in autumn．" Is______．（）A．S+V+O B．S+V+IO+DO C．S+V+PD．S+V+DO+OC98．﹣What a nice building! What is it for？﹣It _______ a hotel．But I'm not sure．（）A．must be B．may be C．can't be D．should be99.Please email me_________hxy050610@sina．com orcall me_________158XXXX5286．（）A．for；on B．at；on C．with；at D．by；on100．5G makes it possible for us to the websites easily and quickly．（）A．look around B．look outC．look after D．look through1-5 C；B；A；C；B；6-10 D；B；A；9C；A；11-15 A；A；B；D；B；16-20 D；C；D；9C；B；17-25 B；B；A；B；A；26—30 -A；B；B；9A；A；31-35 A；C；D；D；B；36-40 C；D；C；9B；B；41--45 C；B；A；A；A；46—50 D；B；B；9B；B；51-55 C；D；B；B；D；56-60 D；B；B；A；C；61-65 B；D；B；A；B；66-70 A；A；B；D；B；71-75 D；B；A；B；B；76-80 D；C；D；A；D；81-85 C；D；C；C；B；86-90 A；A；C；D；B；91-95 A；A；D；D；A；95-100 B；C；B；B；D；。
初二年级错题本考试 (数学)(含答案)203526
学校：____________ 班级：____________ 姓名：____________ 考号：____________绝密★启用前初二年级错题本考试 (数学)试卷考试总分：125 分考试时间： 120 分钟注意事项：1．答题前填写好自己的姓名、班级、考号等信息;2．请将答案正确填写在答题卡上;卷I（选择题）一、选择题（本题共计 12 小题，每题 5 分，共计60分）1. 下面的图形是用数学家（科学家）名字命名的，不是轴对称图形的是( )A.B.C.D.2. 下列分式中是最简分式的是（ ）A.B.C.D.3. 下面是利用尺规作∠AOB 的角平分线OC 的作法：①以点O 为圆心，适当长为半径画弧，交OA ，OB 于点D ，E ；②分别以点D ，E 为圆心，以大于12DE 的长为半径作弧，两弧在∠AOB 内部交于点C ；③画射线OC ，射线OC 就是∠AOB 的平分线．如图，在用尺规作角平分线过程中，用到的三角形全等的判定方法是( )A.ASAB.SASC.SSSD.AAS4. 下列运算正确的是( )A.a m ⋅a 2=a 2mB.(a 3)2=a 5C.a 3⋅a 2⋅a =a 5D.a 3n ÷a n−1=a 2n+15. 若一个多边形的内角和是1080∘，则此多边形的边数是( )A.十一B.十C.八D.六6. 已知：(x −5)(x +★)=x 2−2x −15，其中☆代表一个常数，则★的值为( )A.1B.2C.3D.47. 如图，AD 平分∠BAC 交BC 于点D ，DE ⊥AB 于点E ，DF ⊥AC 于点F ，若S △ABC =12，DF =2，AC =3，则AB 的长是 ( )A.2∠AOB OC O OA OB D E D E DE 12∠AOBCOC OC ∠AOB ASASASSSSAAS⋅=a m a 2a 2m=()a 32a 5⋅⋅a =a 3a 2a 5÷=a 3n a n−1a 2n+11080∘B.4C.7D.98. 如图，在△ABC 中，∠BAC =105∘，DE ，FG 分别为AB ，AC 的垂直平分线，则∠EAG 的度数为( )A.30∘B.20∘C.10∘D.25∘9. 下列运算正确的是( )A.y−x −y =−yx −yB.x +2yx +3y =23C.x 2−y 2x −y =x −yD.x 2−1x 2−2x +1=x +1x −110. 长度分别为1，5，x 的三条线段首尾连接能组成一个三角形，则x 的值可以是( )A.4B.5C.6D.711. 甲乙两地之间的高速公路全长200千米，比原来国道的长度减少20千米，高速公路通车后，某长途汽车的行驶速度提高了45千米/小时，从甲地到乙地的行驶时间缩短了一半，设该长途汽车在国道上行驶的速度是x 千米/小时，依题意得方程是（ ）A.200x =180x −45⋅12B.200x =220x −45⋅12C.200x +45=180x ⋅12D.200x +45=220x ⋅1212. 小青在家写作业，不小心弄洒了墨水瓶，墨迹覆盖了如下解题过程中( )的内容．如图，在△ABC 和△ADE 中，AB =AD ，∠D =∠B ，∠1=∠2．试说明DE =BC ．解：因为∠1=∠2，所以∠1+∠BAE =∠2+∠BAE ，即∠DAE =∠BAC ，在△DAE 和△BAC 中，∠D =∠B ，AD =AB ，∠DAE =∠BAC ，所以△DAE ≅△BAC()，所以DE =BC.则墨迹覆盖的是( )A.SSSB.SASC.AASD.ASA卷II （非选择题）二、 填空题 （本题共计 6 小题 ，每题 5 分 ，共计30分 ）13. 一个红细胞的平均直径是0.0000071m ，则用科学记数法表示该红细胞直径的数据应该为________m ．14. 若分式x 2−1x +1的值为0，则x =________．15. 如图，AC =BC,AD =BD,AE =BE,AF =BF ，则图中共有________对全等三角形，把它们一一表示出来为________．16. 如果等腰三角形的两边长分别为3和5，则它的周长为________.17. 已知方程21+x −k1−x =6x 2−1无解，则k 值是________．18. 如图，在△ABC 中，依次取BC 的中点D 1，BA 的中点D 2，BD 1的中点D 3，BD 2的中点D 4，⋯⋯，并连接AD 1，D 1D 2，D 2D 3，D 3D 4，⋯．若△ABC 的面积是1，则△BD 2019D 2020的面积是________．三、 解答题 （本题共计 7 小题 ，每题 5 分 ，共计35分 ）19. 先阅读，再因式分解：x 4+4=(x 4+4x 2+4)−4x 2=(x 2+2)2−(2x)2=(x 2−2x +2)(x 2+2x +2)，按照这种方法把多项式x 4+324因式分解．20. 计算题：(1)解不等式组：{4x +2>x −7，3(x −2)<4+x ；(2)先化简，再求值 (1−3x +1)÷x 2−4x +4x 2−1，其中x =4.21.如图，方格纸中每个小正方形的边长都是1，△ABC 的三个顶点都在格点上，如果用(1,0)表示C 点的位置，用(4,1)表示B 点的位置，那么．（1）画出直角坐标系；（2）画出与△ABC 关于x 轴对称的图形△DEF ；（3）P 为x 轴上的一个动点，是否存在P 使PA +PB 的值最小？若不存在，请说明理由；若存在请求出点P 的坐标和PA +PB 的最小值．22. 如图，四边形ABCD 中， ∠ABC +∠D =180∘ ，AC 平分 ∠BAD ， CE ⊥AB ，CF ⊥AD.求证：(1)CB =CD ；(2) AB +DF =AF.23. 如图①，直线AB 与x 轴负半轴、y 轴正半轴分别交于A 、B 两点．OA 、OB 的长度分别为a 和b ，且满足a 2−2ab +b 2=0．（1）△AOB 是________三角形．（2）如图②，正比例函数y=kx(k<0)的图象与直线AB交于点Q，过A、B两点分别作AM⊥OQ于M，BN⊥OQ于N，若AM=10，OM=4，求MN的长．（3）如图③，E为AB上一动点，以AE为斜边作等腰直角△ADE，P为BE的中点，连结PD、PO，试问：线段PD、PO是否存在某种确定的数量关系和位置关系？写出你的结论并说明理由．24. 华联超市用50000元从外地采购回一批“T恤衫”，由于销路好，商场又紧急调拨18.6万元采购回件数是上一次3倍的“T恤衫”，但第二次比第一次进价每件贵12元，商场在出售时统一按每件80元的标价出售，为了缩短库存时间，最后的400件按6.5折处理并很快售完，求商场在这笔生意上盈利多少元？25. 如图， Rt△ABC中，∠C=90∘，∠B=30∘，BC=5√3．点E从点A出发沿AC方向以每秒1个单位长的速度向点C匀速运动，同时点卫F从点B出发沿BA方向以每秒2个单位长的速度向点B匀速运动，当其中一个点到达终点时，另一个点也随之停止运动．设点D，E运动的时间是t秒(t>0) ．过点F作FD⊥BC于点D，连接DE，EF，AD．(1)求证：四边形AEFD是平行四边形；(2)当t为何值时， AD⊥EF；(3)当t为何值时，△DEF为直角三角形？请说明理由．参考答案与试题解析初二年级错题本考试 (数学)试卷一、 选择题 （本题共计 12 小题 ，每题 5 分 ，共计60分 ）1.【答案】D【考点】轴对称图形【解析】如果一个图形沿着一条直线对折，直线两边的图形能够完全重合，这样的图形叫做轴对称图形，这条直线叫做对称轴．【解答】解：如果一个图形沿着一条直线对折，直线两边的图形能够完全重合，这样的图形叫做轴对称图形，这条直线叫做对称轴．根据轴对称图形的定义，只有选项D 不是轴对称图形，其它都是轴对称图形．故选D.2.【答案】A【考点】最简分式【解析】IPH 析】选项A ，2xx 2+1的分子、分母都不能再分解，且不能约分，是最简分式；选项B ，原式=2x ；选项C ，原式1x +1；选项D ，原式=−．故选A ．【解答】此题暂无解答3.【答案】C【考点】作图—基本作图全等三角形的判定【解析】利用基本作图得到OD ＝OE ，EC ＝DC ，加上公共边OC ，则可根据SSS 证明三角形全等．【解答】解：由作图可得OD =OE ，EC =DC ，OC =OC ，所以根据“SSS”可判定△OCD 和△OCE 全等．故选C.4.【答案】D【考点】幂的乘方与积的乘方同底数幂的乘法同底数幂的除法【解析】根据幂的乘方，同底数幂的乘法及同底数幂的除法分別计算各选项，比较后得出正确答案．【解答】解：A ，a m ⋅a 2=a m+2，故A 错误；B ，(a 3)2=a 3×2=a 6，故B 错误；C ， a 3⋅a 2⋅a =a 3+2+1=a 6，故C 错误；D ，a 3n ÷a n−1=a 3n−(n−1)=a 2n+1，故D 正确．故选D ．5.【答案】C【考点】多边形内角与外角【解析】此题暂无解析【解答】解：根据n 边形的内角和公式，得(n −2)⋅180∘=1080∘，解得n =8，∴这个多边形的边数是八.故选C.6.【答案】C【考点】完全平方公式【解析】根据x 2+(★−5)x −5★=x 2−2x −15，得到★−5=−2，即可求解【解答】解：∵(x −5)(x +★)=x 2+(★−5)x −5★,∴x 2+(★−5)x −5★=x 2−2x −15，∴★−5=−2，∴★=3.故选C.7.【答案】D【考点】角平分线的性质三角形的面积【解析】求出DE 的值，代入面积公式得出关于AB 的方程，求出即可．【解答】解：∵AD 平分∠BAC ，DE ⊥AB ，DF ⊥AC ，∴DE =DF =2，∵S △ABC =S △ABD +S △ACD ，∴12=12×AB ×DE +12×AC ×DF ，∴24=AB ×2+3×2，∴AB =9.故选D ．8.【答案】A【考点】三角形内角和定理线段垂直平分线的性质【解析】由条件可求得∠EAB =∠EBA ，∠GAC =∠GCA ，且可求得∠EBA +∠GCA =75∘，则可求得∠EAB +∠GAC =75∘，再利用角的和差可求得∠EAG ．【解答】解：∵DE ，FG 垂直平分AB ，AC ，∴EA =EB ，GA =GC ，∴∠EAB =∠EBA ，∠GAC =∠GCA ，∵∠BAC =105∘，∴∠EBA +∠GCA =75∘，∴∠EAB +∠GAC =75∘，∴∠EAG =∠BAC −(∠EAB +∠GAC)=105∘−75∘=30∘．故选A.9.【答案】D【考点】分式的基本性质【解析】根据分式的分子分母都乘或除以同一个不为零的整式，分式的值不变，可得答案．【解答】解：A，y−x−y=−yx+y，分母的所有项都变号，故A错误；B，x+2yx+3y≠23，故B错误；C，分子分母都除以(x−y)，得(x+y)，故C错误；D，分子分母都除以(x−1)，故D正确．故选D．10.【答案】B【考点】三角形三边关系【解析】根据三角形的三边关系：①两边之和大于第三边，②两边之差小于第三边即可得到答案．【解答】解：因为能组成一个三角形，所以5−1<x<5+1，所以4<x<6.故选B．11.【答案】D【考点】由实际问题抽象为分式方程【解析】设该长途汽车在原来国道上行驶的速度为x千米/时，根据“甲、乙两地之间的高速公路全长200千米，比原来国道的长度减少了20千米．高速公路通车后，某长途汽车的行驶速度提高了45千米/时，从甲地到乙地的行驶时间缩短了一半”，可列出方程．【解答】解：设该长途汽车在原来国道上行驶的速度为x千米/时，根据题意得200x+45=220x⋅12．故选D．12.【答案】D全等三角形的性质与判定【解析】∠1=∠2已知，根据ASA 得到△DAE ≅△BAC ，根据全等三角形的性质得到DE =BC ，理由是全等三角形的对应边相等．【解答】解：∵∠1=∠2，∴∠1+∠BAE =∠2+∠BAE ，即∠DAE =∠BAC ，在△DAE 和△BAC 中∠D =∠B ，AD =AB ，∠DAE =∠BAC ，∴△DAE ≅△BAC(ASA)，∴DE =BC ．故墨迹覆盖的是ASA ．故选D ．二、 填空题 （本题共计 6 小题 ，每题 5 分 ，共计30分 ）13.【答案】7.1×10−6【考点】科学记数法--表示较小的数【解析】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：0.0000071=7.1×10−6．故答案为：7.1×10−6．14.【答案】1【考点】分式值为零的条件【解析】分式的值为0的条件是：(1)分子为0；(2)分母不为0．两个条件需同时具备，缺一不可．据此可以解答本题．【解答】解：分式x 2−1x +1的值为0，得x 2−1=0且x +1≠0．解得x =1，故答案为：1．15.6,△ACD≅△BCD⋅△ADE≅△BDE,△AEF=△BEF，△ACE≅△BCE,△ADF≅△BDF,△ACF=△BCF【考点】全等三角形的判定【解析】此题暂无解析【解答】此题暂无解答16.【答案】11或13【考点】三角形三边关系等腰三角形的判定与性质【解析】由于未说明两边哪个是腰哪个是底，故需分情况讨论，从而得到其周长．【解答】解：(1)当等腰三角形的腰为3，底为5时，3，3，5能够组成三角形，此时周长为3+3+5=11．(2)当等腰三角形的腰为5，底为3时，3，5，5能够组成三角形，此时周长为5+5+3=13．则这个等腰三角形的周长是11或13．故答案为11或13．17.【答案】−2或3【考点】分式方程的解【解析】分式方程去分母转化为整式方程，由分式方程无解，得到最简公分母为0求出x的值，代入整式方程即可求出k的值．【解答】解：去分母得：2−2x−k−kx=−6，化简得(k+2)x=8−k，当k=−2时，原分式方程无解；由分式方程无解，得到1+x=0，1−x=0，即x=1或x=−1，把x=1代入整式方程，得：2−2−k−k=−6，即k=3；把x=−1代入整式方程，得：2+2−k+k=−6，即4=−6，矛盾，舍去，则k=3或−2．故答案为：−2或3．18.【答案】122020【考点】三角形的中线三角形的面积规律型：图形的变化类【解析】由三角形的中线性质得出△ABD 1的面积=12△ABC 的面积，△BD 1D 2的面积=12△ABD 1的面积，△BD 2D 3的面积=12△BD 1D 2的面积=123，……，得出规律，即可得出答案．【解答】解：因为D 1是BC 的中点，所以△ABD 1的面积=12△ABC 的面积=12，因为D 2是BA 的中点，所以△BD 1D 2的面积=12△ABD 1的面积=12×12=122，同理：△BD 2D 3的面积=12△BD 1D 2的面积=123，……则△BD n−1D n 的面积为12n ，所以△BD 2019D 2020=122020.故答案为：122020.三、 解答题 （本题共计 7 小题 ，每题 5 分 ，共计35分 ）19.【答案】解：x 4+324=x 4+36x 2+324−36x 2=(x 2+18)2−36x 2=(x 2+18)2−(6x)2=(x 2+18+6x)(x 2+18−6x)．【考点】因式分解-运用公式法完全平方公式【解析】原式变形后，利用平方差公式分解即可．【解答】解：x 4+324=x 4+36x 2+324−36x 2=(x 2+18)2−36x 2=(x 2+18)2−(6x)2=(x 2+18+6x)(x 2+18−6x)．20.【答案】解：(1){4x +2>x −7，①3(x −2)<4+x ，②解不等式①得，x ＞−3，解不等式②得，x ＜5，∴不等式组的解集为：−3＜x ＜5.(2)原式 =x −2x +1⋅(x +1)(x −1)(x −2)2=x −1x −2，当 x =4时，原式=4−14−2=32.【考点】解一元一次不等式组分式的化简求值【解析】暂无暂无【解答】解：(1){4x +2>x −7，①3(x −2)<4+x ，②解不等式①得，x ＞−3，解不等式②得，x ＜5，∴不等式组的解集为：−3＜x ＜5.(2)原式 =x −2x +1⋅(x +1)(x −1)(x −2)2=x −1x −2，当 x =4时，原式=4−14−2=32.21.【答案】解：（1）如图所示：（2）如图所示：（3）存在，连接BD 交x 轴于点P ，连接PA ，由对称可知D(0,−2)，设直线BD 的表达式为y =kx +b ，则有b =−2，4k +b =1，解得：k =34，b =−2，所以直线BD 的表达式为y =34x −2，当y =0时，有34x −2=0，解得x =83，所以P(83,0)，由对称可知PA =PD ，所以PA +PB =PD +PB =DB =√32+42=5．【考点】作图-轴对称变换轴对称——最短路线问题【解析】（1）根据C 点坐标可确定原点位置，然后可画出坐标系；（2）首先确定A 、B 、C 三点关于x 轴对称的对称点位置，然后连接即可；（3）连接BD 交x 轴于点P ，连接PA ，设直线BD 的表达式为y =kx +b ，利用待定系数法确定解析式，然后根据解析式确定P 点坐标，再利用勾股定理计算出BD 的长．【解答】解：（1）如图所示：（2）如图所示：（3）存在，连接BD交x轴于点P，连接PA，由对称可知D(0,−2)，设直线BD的表达式为y=kx+b，则有b=−2，4k+b=1，解得：k=34，b=−2，所以直线BD的表达式为y=34x−2，当y=0时，有34x−2=0，解得x=83，所以P(83,0)，√32+42=5．由对称可知PA=PD，所以PA+PB=PD+PB=DB=22.【答案】证明：(1)∵AC平分∠BAD,CE⊥AB，CF⊥AD，∴CE=CF.∵∠ABC+∠D=180∘，∠ABC+∠EBC=180∘，∴∠EBC=∠D，在△CBE和△CDF中，{∠EBC=∠D，∠CEB=∠CFD=90∘，CE=CF，∴△CBE≅△CDF．∴CB=CD .(2)在 Rt△ACE和 Rt△ACF中，{CE=CF，AC=AC，∴△ACE≅△ACF，∴AE=AF，∴AB+DF=AB+BE=AE=AF.【考点】全等三角形的性质与判定角平分线的性质直角三角形全等的判定【解析】此题暂无解析【解答】证明：(1)∵AC平分∠BAD,CE⊥AB，CF⊥AD，∴CE=CF.∵∠ABC+∠D=180∘，∠ABC+∠EBC=180∘，∴∠EBC=∠D，在△CBE和△CDF中，{∠EBC=∠D，∠CEB=∠CFD=90∘，CE=CF，∴△CBE≅△CDF．∴CB =CD .(2)在 Rt △ACE 和 Rt △ACF 中，{CE =CF ，AC =AC ，∴△ACE ≅△ACF ，∴AE =AF ，∴AB +DF =AB +BE =AE =AF.23.【答案】（1）等腰直角解：（2）∵AM ⊥OQ ，BN ⊥OQ∴∠AMO =∠BNO =90∘∴∠MAO +∠MOA =∠NOB +∠AOM =90∘∴∠MAO =∠NOB∵OA =OB∴△AMO ≌△ONB∴ON =AM =10∴MN =ON −OM =10−4=6（3）PO =PD 且PO ⊥PD ，如图，延长DP 到点C ，使DP =PC ，连结CP 、OD 、OC 、BC，在△DEP 和△CBP ，{DP =PC ∠DPE =∠CPBPE =PB ．∴△DEP ≌△CBP ，∴CB =DE =DA ，∠DEP =∠CBP =135∘，则∠CBO =∠CBP −∠ABO =135∘−45∘=90∘又∵∠BAO =45∘，∠DAE =45∘∴∠DAO =90∘，在△OAD 和△OBC ，{DA =CB ∠DAO =∠CBOOA =OB ，∴△OAD ≌△OBC ，∴OD =OC ，∠AOD =∠COB ，∴△DOC 为等腰直角三角形，∴PO =PD ，且PO ⊥PD ．【考点】全等三角形的判定等腰直角三角形全等三角形的性质【解析】本题主要考查等腰直角三角形的判定及性质，全等三角形的判定及性质.【解答】解：（1）等腰直角三角形∵a 2−2ab +b 2=(a −b)2=0∴a =b∵∠AOB =90∘∴△AOB 是等腰直角三角形故答案为：等腰直角.（2）∵AM ⊥OQ ，BN ⊥OQ∴∠AMO =∠BNO =90∘∴∠MAO +∠MOA =∠NOB +∠AOM =90∘∴∠MAO =∠NOB∵OA =OB∴△AMO ≌△ONB∴ON =AM =10∴MN =ON −OM =10−4=6（3）PO =PD 且PO ⊥PD ，如图，延长DP 到点C ，使DP =PC ，连结CP 、OD 、OC 、BC，在△DEP 和△CBP ，{DP =PC ∠DPE =∠CPBPE =PB ．∴△DEP ≌△CBP ，∴CB =DE =DA ，∠DEP =∠CBP =135∘，则∠CBO =∠CBP −∠ABO =135∘−45∘=90∘又∵∠BAO =45∘，∠DAE =45∘∴∠DAO =90∘，在△OAD 和△OBC ，{DA =CB ∠DAO =∠CBOOA =OB ，∴△OAD ≌△OBC ，∴OD =OC ，∠AOD =∠COB ，∴△DOC 为等腰直角三角形，∴PO =PD ，且PO ⊥PD ．24.【答案】解：设第一次采购了x 件，则第二次采购的件数为3x ，依题意得50000x +12=1860003x ，解方程，得：x =1000．经检验，x =1000是原方程的解．∴原方程的解为：x =1000．∴第二次采购的件数为：3x =3×1000=3000（件）．∴商场在这笔生意中共盈利为：1000×80−50000+(3000−400)×80+400×80×65%−186000=72800（元）．答：商场在这笔生意中共盈利72800元.【考点】分式方程的应用【解析】盈利=总售价-总进价，题中缺少总售价，实际是缺少数量．总价明显，应按单价来列等量关系．关键描述语是：第二次比第一次进价每件贵12元．等量关系为：第一次的单价+12=第二次的单价．【解答】解：设第一次采购了x 件，则第二次采购的件数为3x ，依题意得50000x +12=1860003x ，解方程，得：x =1000．经检验，x =1000是原方程的解．∴原方程的解为：x =1000．∴第二次采购的件数为：3x =3×1000=3000（件）．∴商场在这笔生意中共盈利为：1000×80−50000+(3000−400)×80+400×80×65%−186000=72800（元）．答：商场在这笔生意中共盈利72800元.25.【答案】(1)证明：∵∠ACB =90∘，∴AC ⊥BC ，∵FD ⊥BC ，∴AC//FD ，∠FDB =90∘，∵∠B =30∘，∴FD =12BF ，∵BF =2t ，∴FD =t ，∵AE =t ，∴FD =AE ，∵FD//AE 且FD =AE ，∴四边形AEDF 是平行四边形．(2)解：∵AD ⊥EF ，四边形AEDF 是平行四边形，∴四边形AEDF 是菱形，∴AF =FD ，∵∠ACB =90∘，∠B =30∘，∴AC ∶CB ∶AB =1∶√3∶2，∵BC =5√3，∴AC =5，AB =10，∴AF =AB −BF =10−2t ，∵FD =AE =t ，∴10−2t =t ，解得t =103，∴当t =103时，AD ⊥EF.(3)解：①当∠EFD =90∘时，DB =DC =12BC ，∵BC =5√3，∴DB =52√3，∵∠FDB =90∘，∴BF 2−FD 2=DB 2，即4t 2−t 2=25×34，解得t =52，②当∠FDC =90∘时，E 与C 点重合，∴AC =AE =t =5，∴BF =2t =10，∵AB =10，∴此假设不成立（舍），③当∠FED =90∘时，∵四边形AEDF 是平行四边形，∴AB//ED ，ED =AF ，∴∠EDC =∠B =30∘，∵FD ⊥BC ，∴∠FDC =90∘，∴∠EDF =90∘−∠EDC =60∘，∴∠EFD =180∘−∠FED −∠EDF =30∘，∴ED =12FD =12t ，∴AB=AF+FB=12t+2t=52t=10，∴t=4，∴t=52或t=4.【考点】矩形的性质一元一次方程的应用——其他问题含30度角的直角三角形动点问题平行四边形的判定等边三角形的性质直角三角形的性质三角形的面积菱形的判定勾股定理梯形的面积四边形综合题菱形的性质正方形的判定三角形综合题解直角三角形运动产生特殊四边形平行四边形的性质【解析】此题暂无解析【解答】(1)证明：∵∠ACB=90∘，∴AC⊥BC，∵FD⊥BC，∴AC//FD，∠FDB=90∘，∵∠B=30∘，∴FD=12BF，∵BF=2t，∴FD=t，∵AE=t，∴FD=AE，∵FD//AE且FD=AE，∴四边形AEDF是平行四边形．(2)解：∵AD⊥EF，四边形AEDF是平行四边形，∴四边形AEDF是菱形，∴AF=FD，∵∠ACB=90∘，∠B=30∘，∴AC∶CB∶AB=1∶√3∶2，∵BC=5√3，∴AC =5，AB =10，∴AF =AB −BF =10−2t ，∵FD =AE =t ，∴10−2t =t ，解得t =103，∴当t =103时，AD ⊥EF.(3)解：①当∠EFD =90∘时，DB =DC =12BC ，∵BC =5√3，∴DB =52√3，∵∠FDB =90∘，∴BF 2−FD 2=DB 2，即4t 2−t 2=25×34，解得t =52，②当∠FDC =90∘时，E 与C 点重合，∴AC =AE =t =5，∴BF =2t =10，∵AB =10，∴此假设不成立（舍），③当∠FED =90∘时，∵四边形AEDF 是平行四边形，∴AB//ED ，ED =AF ，∴∠EDC =∠B =30∘，∵FD ⊥BC ，∴∠FDC =90∘，∴∠EDF =90∘−∠EDC =60∘，∴∠EFD =180∘−∠FED −∠EDF =30∘，∴ED =12FD =12t ，∴AB =AF +FB =12t +2t =52t =10，∴t =4，∴t =52或t =4.。
八年级物理上册 全册全套试卷易错题(Word版 含答案)
八年级物理上册全册全套试卷易错题（Word版含答案）一、初二物理机械运动实验易错压轴题（难）1．2007年2月28日，从乌鲁木齐驶往阿克苏的5806次列车遭遇特大沙尘暴，列车从第1节车厢到第11节车厢相继被吹翻．看了这个报道后，某研究小组为探索沙尘暴的威力，进行了模拟研究．如图为测定沙尘暴风力的实验装置图，其中AB是一段水平放置的长为L 的光滑均匀电阻丝，电阻丝阻值较大，一质量和电阻都不计的细长金属丝一端固定于O 点，另一端悬挂球P，无风时细金属丝竖直，恰与电阻丝在B点接触，有风时细金属丝将偏离竖直方向，细金属丝与电阻丝始终保持良好的导电接触．研究小组的同学对此装置分析中，知道金属球单位面积上所受到的水平风力大小与电压表的读数成正比，空气密度为1.3kg/m3，沙的密度为2.5×103kg/m3．他们对决定金属球单位面积上所受到的风力大小的因素，进行了如下的实验研究：①在含沙量相同条件下，改变风速，记录不同风速下电压表的示数如下：风速（m/s）5101520电压表示数（V）0.6 2.4 5.49.6②在风速大小相同条件下，改变风中空气的含沙量，记录不同含沙量下电压表的示数如下：含沙量（kg/m3） 1.1 2.2 3.3 4.4电压表示数（V） 2.3 3.5 4.6 5.8（1）根据上述实验结果，试推导出单位面积上所受到的风力大小的关系式？（设比例系数为k）（2）若（1）中的比例系数k的大小为0.5，已知：车厢的高度为3m，车厢的长度为25m，车厢质量为50t，铁轨间距为1.5m，1m3沙尘暴中含沙尘2.7kg，请根据（1）中的关系式计算当时的风速至少为多大？【来源】2009年江西省上饶县二中九年级应用物理知识竞赛复赛模拟试题（三）【答案】（1）p=kρv2，ρ为含有沙尘的空气密度；（2）41m/s【解析】【分析】 【详解】 （1）．①分析数据可看出风速每增加5m/s ，电压表的示数增加量分别是1.8V 、3V 、4.2V ，也就是说，在这里，风速和压力并不是呈一次函数关系，可以假设一个方程，即：U ∝av 3+bv 2+cv +d ，把表中实验数据代入表达式，解得：a =0，b =0.024，c =0，d =0，即U ∝0.024v 2；②分析含沙量与电压表示数的数据，含沙量每增加1.1kg/m 3，电压增量即为1.2V ，也就是说，含沙量与压力成正比，U ∝ρ；风力越大，导线的偏移量与电压成正比，单位面积所受压力即压强，则p =kρv 2，ρ为含有沙尘的空气密度，k 为比例常数．（2）．车厢可以看做杠杆，由杠杆平衡条件得：F ×2h =G ×2d ，则风力F =d h G ， F =pS =kρv 2S =kρv 2hL ， v =323321.5m 5010kg 10N/kg 0.5(2.7kg/m +1.3kg/m )(3m)25mdG k h L ρ⨯⨯⨯=⨯⨯⨯≈41m/s ． 答：（1）．单位面积上所受到的风力大小的关系式为p =kρv 2，ρ为含有沙尘的空气密度； （2）．风速为41m/s ．2．如图所示，在测量小车运动的平均速度实验中，让小车从斜面的A 点由静止开始下滑并开始计时，分别测出小车到达B 点和C 点的时间，即可算出小车在各段的平均速度（1）图中AB 段的距离s AB =________cm ，测得时间t AB =1.6s ，则AB 段的平均速度v AB =________m/s 。
初中英语八年级上册易考易错选择题练习(附参考答案)
八年级英语上册易错题练习班级考号姓名总分1. ________ do you swim with your friends?I do that every day.A How soonB How farC How oftenD How much2.Here _______ the results _______ the student activity survey.A is; withB are; ofC is; ofD are; with3.You must _______ yourself.A look forB take afterC take careD look after4.We should try our best _______ hard.A workB worksC workingD to work5.--- _________ has Mr.Smith taught in our school?--- For three years.A How oftenB How longC How many timesD How often6._________ give up, then you can be successful.A NeverB SometimesC OftenD Usually7.----Is your lifestyle the same _______ Linda’s, Jerry ?----No, mine is quite different _______ hers.A as; fromB as; asC from; asD from; from8.Mike gave us _______ on how to improve English.A some advicesB many advicesC some adviceD an advice9.______ me carefully, boys and girls.Can you _____me?A Hear; listen toB listen to; hear fromC Hear; hearD Listen to; hear10.This sweater looks_______, so it sells ________.A well; goodB good; wellC good; goodD well; well11.InChina, people like eating some yin food ______ tofu.A asB likeC likesD and12.You have _______ yin, so you often feel______ weak and tired.A too much; too muchB much too; much tooC too much ; much tooD much too; too much13.---What’s _________ ?---I have got a sore throat.A matterB your wrongC your trouble with youD the matter14.---________ did it start ?--- About 3 days ago.A How oftenB How longC WhenD How soon15.Don’t forget _________ him the news.A tellB to tellC tellingD told16.I am planning _______ a very ________ vacation.A to have; relaxingB have; relaxingC to have; relaxedD have; relaxed17.Chinais famous ________ the Great Wall.A asB withC onD for18.---Can you see _______ in the tree?----No, I can see ________ .A something; nothingB anything; nothingC nothing; anythingD anything; something19.How about ________ tomorrow?A go hikingB go hikeC going hikeD going hiking20.You should keep your house ________ .A cleaningB to cleanC cleanD cleans21.It takes us 2 hours _______ to the zoo.A rideB to rideC rodeD riding22.--- How do you go to school?---_______ .A By footB On footC By feetD On feet23.If you have ________ questions, please ask me.A otherB elseC the otherD others24.________ like singing and dancing; _______ like playing chess.A One; the otherB Some; the otherC Some; othersD Some; the others25.I often _______ home.A walk toB on footC walkD walks26.Yang Liping is famous _______ a great dancer.A forB toC asD with27.Ann’s home is about 10 kilometers _______ school.A awayB toC away fromD far from28.My father’s office is at the top.I can see the whole city _______ the office.A fromB onC withD in29.The girl looks the _______ her father.A same likeB likeC same asD same30.The famous writer gave us _______ about how to write novels.A talkB a talkC talkingD to talk31.Danny said that he would be a doctor _______ two more years.A afterB beforeC inD for32.We _______ you a merry Christmas.A hopeB makeC wishD take33.Nobody helps Mary ______ Lily.A thatB butC withD for34.Which is _________, the sun or the moon?A bigB biggerC biggestD more big35.--- How do you feel today, Ted?--- I feel _______ better today, thank you.A moreB littleC a fewD a little36.---Of the two man , who is your father ?---________ of them is my father.A NeitherB BothC NoneD Either37.This book is ______ as that one.A sameB differentC the sameD difference38.You look tired.Why ________ a rest?A not to haveB don’t haveC not haveD no have39.The government plans _________ a square here.A to buildB buildingC buildD built40.There isn’t ______ on TV.A something importantB important somethingC anything importantD important something41.---- Is everyone here today?---- No, Tom isn’t here.He must ______ .A is illB be illC be illnessD healthy42.--_______ shall we make it?-- You must cut up the apples first.A WhereB WhoC HowD Which43._________ yogurt shall we need?A How manyB How littleC How muchD How few44.First you peel some bananas.Then you can _____ .A cut it upB cut up itC cut them upD cut up them45.It’s raining now.You have to take ______ umbrella with you.A aB anC someD /46.They gave up the plan ________ the end.A inB atC withD on47.Can you say it again? I ________ you clearly.A hearB heardC don’t hearD didn’t hear48.--- Did you see any seals?---________.I saw nothing.A Yes, I didB Yes, I didn’tC No, I didD No, I didn’t49.--______do you watch TV? --Three times a week.A How manyB How muchC How oftenD How far50.“______does she go to the movies?” “Sometimes”A WhenB How oftenC What time.D How long附：参考答案：1-10 CCDDB AACDB11-20 BCDCB ADBDC21-30 BBADC CCACB31-40 CCBBD ACCAC41-50 BCCCB ADDCB。
八年级上册全册全套试卷易错题(Word版 含答案)
八年级上册全册全套试卷易错题（Word 版 含答案）一、初二物理 机械运动实验易错压轴题（难）1．小明在“测小车的平均速度”的实验中，设计了如图所示的实验装置：小车从带刻度的、分度值为1 cm 的斜面顶端由静止下滑，图中的时间是小车到达A 、B 、C 三处时电子表的显示时刻：（1）该实验是根据公式____进行测量的；所用的测量工具是___________和______________；（2）实验中为了方便计时，应使斜面坡度较___ （填“陡”或“缓”）些；（3）请根据图中所给信息回答：BC s =_______cm ，BC t =______s ，AC v =_____m/s ；（4）实验前必须学会熟练使用电子表，如果让小车过了A 点后才开始计时，则会导致所测AC 段的平均速度AC v 偏____（填“大”或“小”）；（5）甲、乙两组实验操作中，小车通过的路程之比是2∶3，所用的时间之比是4∶3，则甲乙两物体运动的平均速度之比是______。
【来源】河南省三门峡市陕州区2019-2020学年八年级（上）期中考试物理试题【答案】s v t =刻度尺 秒表 缓 5.0 1 0.033 大 1∶2 【解析】【分析】【详解】(1)[1][2][3]平均速度是指某段时间内的路程与这段时间的比值，计算公式为s v t=，实验中要用刻度尺测量路程，用秒表测量时间。
(2)[4]斜面坡度越大时，小车沿斜面向下加速运动越快，过某点的时间会越短，计时会越困难，所以为使计时方便，斜面坡度应该较缓一些。
(3)[5][6]由图知 5.0cm BC s =，15:35:2315:35:221s BC t =-=[7] 由图知10.0cm AC s =，15:35:2315:35:203s AC t =-=所以10.0cm 3.3cm/s=0.033m/s 3s AC AC AC sv t ==≈ A 、C 间的平均速度为0.033m/s 。
八年级上册英语易混易错测试题.doc
八年级上册英语易错易混测试一单项选择(每题2分,共40分)(1)There is to do today.A nothing muchB much nothingC many nothingD nothing many(2)Put the ingredients in a bowl and.A mix it upB mix up itC mix them upD mix up them(3)Are there any in the picture?A fishB parkC beefD bread(4)The car is dear .1 don't have money.A too much, much tooB much too, too muchC too many, too muchD too much, too many(5)Your teacher in the office.A maybeB may beC may isD is may(6)Eight students in our school.A hundredB hundredsC hundreds ofD hundred of(7)Our hospital needs two doctors, you can ask your son tohave a try.A womenB womanC menD man(8)Look, ___________A here comes the busB here the bus comesC here is coming the busD here the bus is coming(9)Why not-there for a change?A try walkingB trying to walkC to try and walkD to try walking(10)Can you imagine what time wills him like in time?A 50 years'B 50 yearsC 50-year's D50-years(11)Xian is one of capital in China.A older, cityB the older, cityC oldest, cityD the oldest, cities(12)Would you please tell me.A when will the bus leaveB when the bus will leaveC when does the bus leave(13)They swim across the river.A can bothB both canC are bothD both are(14)May I ask? —Yes it is. -Can I swimming?A questionsB a problemC somethingD anything(15)Shanghai is more crowded than in America.A any cityB any other cityC other citiesD the other cities(16)I don't know the new word. ----- You can it in dictionary.A look for itB look it forC look up itD look it up(17)We had better wait more minutes, I think he will come soon.A fewB a fewC a littleD little(18)Must I finish the work? ——No, you.A mustn'tB needn'tC can'tD have too(19)They waited and waited for something to happen.A exciteB excitedC excitingD to excite(20)There are many students playing in the playground, some are playingfootball, some are running,are playing tennisA othersB the othersC anotherD the other二判断对错(每句1分，共16分，用T,F)If it doesn't rain, we will go hiking. ( )If it doesn't rain, we will go hiking. ( )He maybe a teacher. ( )He may be a teacher. ( )Maybe he is a teacher.I think he didn't see me.I don't think he saw me.The baby needs to look after.The baby needs to be looked after.The baby needs looking after.Eating more vegetables is good for your health.Eating more vegetables are good for your health.They didn't get back home.They didn't get back to home.I don't believe he can work out at the math problem by himself.I believe he can't work out at the math problem by himself.三选词填空(每空2分,共22分)health little minute fun much good best play loud hevisitThey visit the Center and watch a movie about dog.Han Hong is one of my favorite.My mum has a lifestyle, she eats junk food but more fruits.The you practice, the your English will be.He doesn't write as as his brother.It's about five walk from my home to school.My English teacher is as as hers.Please speak, I can't hear you.The boy is old enough to dress.四句子应用(每题3分,共6分)Whafs the weather like today?(用be going to 句型改写)He didn't go to the park. I think.(合并为一句)五用括号里所给词的适当形式填空(每题2分，共16分)(1) A lot of(America ) will come.(2)He(put) on his coat and went out.(3)We must listen to our teacher(care).(4)Tom is, we all worried his(ill).(5)There are some(different) between cities.(6) 1 think, this clothes is a little(big).(7)Football is becoming(popular).(8)Our classroom is bigger than(they).参考答案1. c2. B3. C4. C5. B6. A7. D8. A9. B 10 A 11. B 12. A13. A 14. B 15. D 16. D17. C 18. A 19. B 20. DT F F T T F T T T F F T T F T Fplayers healthy less cousin's more better well funnyminutes5 louder himselfWhafs the weather going to be like.I don't think he went to the park.五1. Americans2. put3. carefully4. ill illness5. differences6. bigger7. more and more popular8. theirs。
八年级上学期期末易错题整理(含答案)
八年级易错题梳理期中考前部分单项选择：1. Who should ________ the lead poisoning (铅中毒) children in Fengyang, Shanxi Province?A. responsible forB. be responsible forC. responsible toD. be responsible to2. The taxi driver expected me ________ him more than I did.A. to giveB. giveC. gaveD. giving3. The little boy can do simple problems in arithmetic. The underlined word means ________.A. easyB. difficultC. complicatedD. basic4. Look, they are warmly discussing the holiday plan. The underlined word means ________.A. taking aboutB. talking aboutC. sayingD. speaking5. I saw my little brother ___________ in his room just now.A. playB. to playC. playingD. is playing6. IBM is a world-famous business in personal computers.The underlined word means ________.A. marketB. shopC. companyD. school7. Tomorrow I'll have to return the book to the library.The underlined word means ________.A. go backB. come backC. take backD. give back8. My elder brother Jimmy is not ___________ me. He really like sports, but I don't.A. the sameB. similar toC. different fromD. likes9. The Children's Restaurant is open every weekday ___________ Wednesday.A. onB. exceptC. expectD. beside10. I'm going to ___________ a meeting tonight.A. joinB. take part inC. join inD. attend11. She could hardly believe such a large ___________ of money was hers.A. numberB. sumC. dealD. amounts12. A Maglev train(磁悬浮列车) ran ____ the tunnel at an amazing speed.A) on B) across C) through D) for13. The teacher noticed the whiz-kid ____ the cost at the time.A) calculate B) calculates C) calculating D) calculated14.Would you like to have some tea or coffee?_________. Thank you. I’ve just had enough tea.A.EitherB. NeitherC. SomeD. Both15.This is a photograph of_______. Can you show me__________?A.me,yoursB.my,yourC.myself,yourD.mine,you16.Would you like___________one of my pen-friends?A.beingB.to doC.to beD.be17.We _______buy a DVD player because we can watch VCDs on the computer.A.needB.need toC.don’t needD.don’t need to18.The best way to learn English is to keep________.A.practiceB.practicingC.to practiceD.for practicest month,Jimmy’s father gave him______MP4 as______birthday present.A.a,aB.an,anC.a,anD.an,a词转1.Mr. Zhang has a large_____ of stamps from different countries.(collect)2.The lady was not satisfied with the food and wanted to see the_____ of therestaurant.(manage)3. The ___________（fail）of the experiment made him lose his courage.4. May will ___________ write an e-mail to her penfriend soon. (probable)5. We are all looking forward to ___________ Liu Qian's wonderful magic show. (watch)6. I don't think Bill's spoken English is ___________ than Jim's. (bad)7. How ________ you were to see Liu Xiang at the airport! (luck)8. Shop ________ (assist) are always kind to customers.9. Computer games are very popular in China. The ________ go up every year. (sell)10. If you don’t have ________ training every day, you will be too fat soon. (physics)11. ________ is not so far if you keep your dream and try. (successful)12. The teachers ________ the matter just now. (discussion)13. It’s ________ to have such a heavy snow in Australia. (usual)14. What' was your ___________ when you were born?(high)15.Every morning Wendy _______ the business with her family over breakfast. (discussion)16. Our company is the biggest user of____________in this area. ( electric )17. Albert Einstein, the 20th century’s greatest ____________ died at the age of 76. ( science )18. You're too ____________ with her. She's only a child. ( patient )19. The young man is the _________ of the big house with a swimming pool in it. ( own )20. There was a _________ in his home last night. Early this morning he reported it to the police station. ( thief )21. As we all know, China is a _________ country with a long history, (development )22. Thomas Edison is one of the greatest _________ in history. ( invent )23. Let's make it at four o'clock at the _________ of our school. ( enter )24. Can you see the_____ calculator on the desk?(electricity)25. His car had a_______ engine.(power)26. With the______ of our country, our life is getting better and better.(develop)27. Humans brains are just like_____ computers.(live)28. Do you know the______ to the problem?(solve)29. Edison is one of the most famous_____ in the world.(invent)30. I happened to see a_____ on my way back home(rob)31. Just now heard a big______ (argue)at the cinema entrance.句转1.It’s impossible for human to live on the Mars in the near future.(反义疑问句)It’s impossible for human to live on the Mars in the near future, ________ ________？2.They held the APEC 2005 from Nov.12-15 in Busan,South Korea.(改被动语态)The APEC 2005______ _______from Nov.12-15 in Busan,South Korea.3.Could you tell me which flight I should take?(改为简单句)Could you tell me________ ________ ________take.4.The meeting room is so small that it can’t hold so many people.(保持句意不变)The meeting room is________big________to hold so many people.5.Jack has been to Hong Kong only once.（划线部分提问）________ ________ ________has Jack been to Hong Kong?6.The teacher asked me,’Have you finished your maths homework?（合并句子）The teacher asked me________I________ finished my maths homework.7.I won’t go to Kitty’s birthday party if she doesn’t invite me.(保持句意不变)I won’t go to Kitty’s birthday party________she________me。
第一学期牛津译林版八年级上册英语期末复习易错题整理(含答案)
八年级上册英语期末复习易错题整理一、单项选择1. ---How much do we need to pay for the cooking course?---Don't worry! It's free. and we will the tools for you.A.practiseB. protectC. provideD. prevent2. ---Did you hear the shouts from the little girl?---Yes. When I arrived there, I found her looking at a snake .A.in factB.in fearC. in dangerD. in order3. ---Did you buy anything on Double Eleventh Festival? Things were much cheaper than usual.---________ at all. I have no interest in online shopping.A.NoneB.NothingC.NotD.No4. This is the best way__________him__________too much TV.A.stopping; watchingB.to stop; to watchC.to stop; watchingD.stop; to watch5. Nanjing isn’t so large________Shanghai. But, it’s the second________city in East China.A.like; largestB.as; largestC. like; largeD. as; large6. ---It is too cold these days.---Why not an air conditioner (空调) in your bedroom?A.put awayB. put inC. put onD.put up7.You’d better take a________with you when you go birdwatching so that you can take photos ofsome rare birds.A.binocularB.mapC.cameraD.notebook8. They will protect their families if there's_____________.A.dangerousB.in dangerC. dangerD. in dangerous9. The engineers__________a new computer in our classroom the whole yesterday morning, so we had our classes in the school hall.A.were fixingB. fixedC. have fixedD. are fixing10. The temperature will be _______ tomorrow. It will _______ to -5ºC.A.colder; fallB.less; fallC. higher; coverD. lower; drop11. _______wonderful time to watch the birds in the wild on the coming holiday!A.HowB.How aC. What aD.WhatC. To stop; slow downD. Stopping; slow down12. The giant panda weighs just__________when it is____________.A.10 kilogram; 10 month oldB.10-kilograms; 10-month-oldC.10-kilogram; 10 months oldD.10 kilograms; 10 months old13.--- What shall we do now?---__________ it’s raining hard, let’s stay at home.A.SoB.SinceC.HoweverD.Otherwise14. It’s very dangerous for drivers to have a long drive at night. They may feel _____.A.sleepyB.excitedC.excitingD. nervous15. Finally, the two volunteers________a plan and helped the trapped deer out of danger.A. looked outB.worked outC. got outD. took out16. Planting more trees________it________ for people to protect more wildlife.A.make; possibleB. makes; possibleC. make; impossibleD. makes; impossibleputers entered the Chinese market___________and have been popular since then.A. in the 1990B. in the 1990sC. in the year 1990sD.in 1990s18.Our city is trying to provide homeless people special shelter(庇护所) stay.A.with; toB. with; inC. for; toD. for; with19. ---Oh, no! We are in the wrong place.---Sorry, I have no sense of__________, especially in a new place.A.applicationB. instructionC. directionpetition20. ---Could you find___________ways to work out this problem, Jim?---Yes, I_________.A.other; couldB. the other; canC.other; canD. the other; could21. ---How do you find the newspaper TEENS?---Good indeed. It many news stories around the world.A.showsB.coversC.writesD.says22. ---Rose, we will start at six tomorrow morning. Don't be late, will you?--- . I will be there on time.A.No, I willB.Yes, I willC.No, I won'tD.Yes, I won't23.---What should I do when the earthquake happens, Dad?---First of all, it’s important to_________and hide yourself in the corners of the room.A.calm downB.put downC.turn downD.fall down24. ________six years old, Millie took a train to Beijing________the first time.A.In; atB.Of; atC. At; forD. At; of25. ---Do you think Hey-tea is delicious?---Sorry, I’ve had too much and I’ve lost my_______of taste.A.timeB. senseC. powerD. interest二、动词填空1. Tom____________ (throw) a snowball at his brother and he looked so happy.2. I think you’d better___________ (discuss) the problem with your parents or your teachers.3. ---Why didn’t you watch the wonderful show last night?---Oh, I________ (chat) on QQ with my friends at that time and forgot all about that.4. Henry invited me___________ (stay) with him when his parents went for a holiday.5. The fish in the river___________(be) in danger because the water is polluted.6. ---Would you please____________(write) down your names on the paper? ---Sure.7. My family___________ (plan) to travel abroad during the Spring Festival these days.8. The girl___________ (shake) her head with tears in her eyes when she heard the bad news.9. Don’t break the traffic rules, or the cameras on roads__________ (record) everything.10. We want to know what action we can take__________ (stop) people hunting wildlife.11. Because of___________(get) lost in the forest, the little boy began to cry.12. I don’t want him to help me because he _________ (prepare) for his exams.13. ---The rainy season is coming, so bad! ---I agree, and there_______(be) much rain then.14. I saw her _________ (dance) on the square at eight yesterday evening.15. You’d better_________ (not cut) your names on the bamboo here.16. While I was cooking, he suddenly _________ (fall) onto the ground.17. He should go to see the film after he _________ (know) how wonderful it is.18. ---What a pity! You missed the firework show last night.---Yes. But I____________(write) an important report then.19. Which city is Mrs. Green flying to_________(see) her son?20. In autumn, everything________ (turn) brown and the leaves begin to fall off the trees.21. What a pity! The baby died because his mother_________(look) at her mobile phone when theaccident happened.22. The player decided________( not give) up the chance to play in the next World Cup.23. Simon is crazy about computer games and______(spend) most of his pocket money on them.24. ---What a day! It’s raining again. We can’t go hiking tomorrow.---Don’t worry. The rain________ (stop) soon.25. --- You look so nervous. What’s up?--- I took an exam yesterday and I___________ (wait) for the result.三、单词拼写：根据所给汉语注释或对话情景，写出空缺处各单词的正确形式。
英语EEC8上
第Ⅰ卷一、单项选择（本题共20分，每小题1分）选择最佳答案。
( ) 1. Boys and girls, if you try your best in the ______ exam, you’ll have ______ pleasant result.A. 100 minutes’, anB. 100-minute, aC. 100-minutes, the( ) 2. －Are you traveling _____?－Yes , I prefer to go to places far away ____ .A. by yourselves, aloneB. lonely, aloneC. alone, by myself( ) 3. It was time for the birds to fly south. But one of them got hurt ______ the way.A. forB. onC. by( ) 4. －What makes you so happy?－Tony brought me the best _______ from his parents. I miss them so much because they cared for me a lot during my stay in America.A. regardsB. flowersC. rewards( ) 5. Would you like to ______ if we make a plan for this weekend to visit Maple Leaf Village?A. come alongB. come outC. come up( ) 6. The Rewards of Kindness teaches us a lesson ______ can help us have better relationships and feel good about ourselves.A. whoB. whatC. that( ) 7. －What do you think of the movie The Little Prince?－I watched it on Oct.16. I think it is as ______ as the story in the book.A. goodB. betterC. best( ) 8. Our teachers are always working hard. When they have classes, they always tell us the details _____ at the important words on the blackboard.A. pointB. pointingC. pointed( ) 9. — Could you tell me _______?—I’m not sure. Maybe he lives near the shopping center.A. when he bought the new houseB. where he livesC. why he moved here( ) 10. The Red Cross has helped people in peacetime ______ in wartime. It plays ______ an important role that everybody who meets disasters will think of its help.A. as long as, suchB. as soon as, soC. as well as, such( ) 11. — _____ do you usually practice your drama show?— Once a week.A. How soonB. How oftenC. How long( ) 12. Tourists’ bad behavior(行为) ______ by the government in our country from now on.A. will be recordedB. was recordedC. records( ) 13. — _____ clod weather it is today!—You’re right. Winter is coming.A. WhatB. What aC. How( ) 14.While we ______ last night, someone stole my dad’s car.A. sleptB. were sleepingC. sleep( ) 15. In western countries, people always give someone advice to their friends very gently and their friends can usually be happy to accept it. Therefore, which situation fits the western custom?A: a: You shouldn’t open the window.b: All right.B: a: If I were you, I’d take one more coat today.b: It’s a pity that you are not me!C. a: May I advise you to see a doctor and have a good rest?b: Thank you for your advice.( ) 16. It is a virtue (美德) of the Chinese to be kind to the old. So what should young people do to show honor to the old in the daily life?①Shout at the old when they walk slowly.②Help the old to cross the street when the traffic is heavy.③Give all of the money to the old.④Give delicious food to the old at home.⑤Always allow the old to go first when they are getting off a bus or a train.A. ①②④B. ②③⑤C.②④⑤(A. 45( ) 18. Which pair of the words with the underlined letters has the same sound?A. native ancientB. suffer cruelC. tiny fill( ) 19. Which of the following words has a different sound from the underlined letter of the word "race"?A. caveB. trackC. whale( ) 20. Which word of the following doesn't have the same stress as the others?A. UniqueB. ConnectC. Wisdom二、完形填空（本题共10分，每小题1分）It was getting dark. Paul looked out of the window and signed (叹气). Dad said he could come home by 5:30, but it was almost 7:00. Even if Dad came back, it wouldn’t be much fun playing 21 in the dark. Paul walked into his room and threw his baseball into the corner. He tried to do some homework, but couldn’t.The phone rang at about 8:00. It was Dad: “Paul, I’m22 , and I couldn’t play baseball with you tonight. I have to finish my work at the office. Maybe we can play this wee kend. Oh no. How about next weekend?”Paul couldn’t understand why Dad was so busy. He threw himself into the sofa and soon 23 . His book was still opened to the first page.The next day he woke up and hurried to school. At school, Paul didn’t hand i n his homework and 24 a test. Mrs. Green, his teacher, got him 25 after school. “Paul, you didn’t do your homework. You didn’t pass the test and only got a D. This isn’t like you. What’s wrong?”Paul just sat there 26 . “Paul, if you don’t want to talk, I will. I know that something’s worrying with you, but you have to get it out. You need to tell someone.”As Paul walked home, he thought of what Mrs. Green said. Maybe he didn’t do his homework because he wanted to get his dad’s 27 . He knew Mrs. Green was right. He decided to take her advice.When Paul got home, he 28 his dad. But there was no answer. Then it went to voicemail (语音信箱). Paul began talking: “Dad, I can’t play with you next weekend. I’ve got lots of problems with my homework. Also, I really don’t want to spend another day looking out of the window and waiting. Whenever you 29 our plans, Dad, it hurts me. It’s not too late to rebuild our relationship, but we have to start small. Maybe you can help me with my homewo rk sometime. Dad, I love you.”As Paul ended the call, he felt much relaxed. He didn’t know 30 his dad would be different, but it didn’t matter. He himself changed. He expressed his feelings to the right person. He had a clear head as he was doing his homework that evening.( ) 21. A. baseball B. cards C. chess( ) 22. A. lucky B. sorry C. surprised( ) 23. A. took a shower B. fell asleep C. had a test( ) 24. A. made B. missed C. failed( ) 25. A to stay B. stay C. staying( ) 26. A. cheerfully B. comfortably C. quietly( ) 27. A. attention B. message C. idea( ) 28. A. saw B. thanked C. called( ) 29. A. prepare B. break C. follow( ) 30. A. whether每小题1分）(A)Mrs. Forgetful has a lot offriends, but she knows none of them well. She has a big house with a garden. The gardener grows all kinds of beautiful flowers in it. She has her own driver and cook. Therefore, she doesn't do any housework. But she has felt lonely since her husband died. She wishes someone could talk with her.One day the woman heard a new film was playing at a cinema. She went there at once. When she got there, they told her the film was starting at a quarter past eight. She had a look at her watch and there were twenty minutes left. There were only some people there. She had nothing to do and felt very senseless. So she began to talk to a man next to her."I saw Mr. Hunt this morning. He's much fatter than before." said the woman. "We should tell him to do more exercises.""Mr. Hunt？Who's he?" the man asked in surprise."Oh, you've forgotten our friend!" said the woman."But I don't know him at all, madam!"The film began and she had to stop talking. When the film was over, she met the man at the exit."Oh, Mr. Hunt." said Mrs. Forgetful. "Can you guess what I did just now?""Yes, I can, madam." said the man. "____________________" With these words, the man hurried off.根据短文内容选择正确答案。
八年级上册期末试卷易错题(Word版 含答案)
八年级上册期末试卷易错题（Word版含答案）一、初二物理声现象实验易错压轴题（难）1．某兴趣小组计划探究“铝棒的发声”．同学们使用一根表面光滑的实心铝棒，一只手捏住铝棒的中间部位，另一只手的拇指和食指粘少许松香粉，在铝棒表面由手捏部位向外端摩擦，可以听见铝棒发出声音，而且发现在不同情况下铝棒发声的频率是不同的，为了探究铝棒发声频率的影响因素，该兴趣小组找到不同规格的铝棒、虚拟示波器等器材进行探究．实验前同学们提出了以下猜想：猜想A：铝棒发声的频率可能和铝棒的横截面积有关猜想B：铝棒发声的频率可能和铝棒的长度有关猜想C：铝棒发声的频率可能和手捏铝棒的部位有关为了验证猜想A，同学们选择4根铝棒，每次均捏住铝棒的中间部位，由手捏部位向外端摩擦，实验所得的数据记录于下面的表格中，在2%的误差允许范围内（频率相差在70Hz 以内）的测量值可以认为是相等的．（1）分析表格中数据，可知铝棒的发声频率与横截面积是______________的．（选填“有关”或“无关”）（2）为了验证猜想B，同学们选择横截面积均为2.9×10﹣5m2的铝棒，实验所得的数据记录于下面的表格中，同学们从表中前两列数据很难得出频率f与长度L之间的关系，他们利用图象法处理数据，画出了频率f与长度的倒数1/L的关系如图所示，分析可知发生频率f 与铝棒的长度L的关系是成______(正/反)比．（3）同学们又通过实验探究了铝棒发声的频率和手捏铝棒部位的关系，在实验过程中，有同学们将发声的铝棒一端插入水中，可以看到______________现象，有同学用手迅速握住正在发声的铝棒，可以听见声音很快衰减，原因是____________________________．【答案】无关反比例水花四溅振幅减小，响度减小【解析】（1)通过比较表格中的1和3（或者2和4）可知，,当铝棒长度都为0.71m时,横截面积不同,频率为3500hHz和3530Hz,由于这两个频率在2%的误差允许范围内(频率相差在70Hz以内)，故频率是相同的，故结论为：铝棒的发声频率与横截面积是无关的；(2)由图象可知,频率f与长度的倒数1L的关系是一条直线，即成正比，故发生频率f与铝棒的长度L的关系是成反比； (3)有同学们将发声的铝棒一端插入水中，铝棒振动，引起水的振动，故可以看到水花四溅；有同学用手迅速握住正在发声的铝棒，可以听见声音很快衰减，原因是铝棒的振幅减小，响度减小。
苏科版八年级物理上册 期中精选试卷易错题(Word版 含答案)
苏科版八年级物理上册期中精选试卷易错题（Word版含答案）一、初二物理声现象实验易错压轴题（难）1．小华和小刚用棉线连接了两个纸杯制成了一个“土电话”．以下是他们对“土电话”的探究．()1他们用“土电话”能实现10m间的通话，这表明________．()2两人位置不变，以相同的响度讲话，改用细金属丝连接，则听到的声音就大些．这一实验表明________．()3小华和小刚利用以上两个纸杯和一些长短、粗细不同的琴弦，又进行了探究“音调和哪些因素有关”的活动．他们选用的琴弦长度、材料在如图中标出（其中琴弦的直径关==<），并且每根琴弦固定在“音箱”上的松紧程度一致．系：a c d b()4①若他们想探究“音调的高低与琴弦材料”的关系应选择琴弦_____（从“a”、“b”、“c”或“d”中选两根）．②若选择琴弦a和b，则是为了研究音调的高低与________的关系．【答案】固体能够传声金属的传声效果好a、c材料粗细【解析】【分析】【详解】(1他们用“土电话”能实现10m间的通话，是因为固体能够传声，即这表明固体能够传声．()2两人位置不变，以相同的响度讲话，改用细金属丝连接，则听到的声音就大些．这一实验表明金属的传声效果好．()4①根据控制变量法的思路，若他们想探究“音调的高低与琴弦材料”的关系，应选择粗细相同，而材料不同的两根琴弦，即选择a和c；②若选择琴弦a和b，长度和材料相同，粗细不同，所以是为了研究音调的高低与材料粗细的关系．2．为了探究收音机接收电磁波的情况好坏与哪些因素有关，小明将一只袖珍收音机调好电台节目和音量后完成了以下实验：①将收音机放进一只铝锅内，发现声音明显变小，取出后又恢复了原来的音量。
②将收音机放进一只木桶内，发现声音大小不变。
③将收音机放进一只铁桶内，现象与①相似。
④将收音机放进一只塑料桶内，现象与②相似。
(1)根据以上实验，小明得出这样的结论：电磁波在传播途中，若遇到________类物体，其强度就会大大减弱。
八年级英语上册 典型错题及解析 仁爱版
八年级英语上册典型错题及解析( )1. Good food and exercise ______ me to study better.A. helpB. helpsC. helpingD. to help( ) 2. Is her lifestyle the same ______ yours or different?A. asB. inC. atD. to( )3. My father likes football. But he ____ it. He only ____ football matches on TV!A. plays, watchesB. play, watchC. doesn’t play, watchesD. plays, doesn’t watch6. A: I ______ _________ ________ (feel) well now.B: You should go to the doctor.7. He believes that I should __________(have) a good habit..8. 我妈妈说我应该晚饭尽量少吃肉。
My mom said that I should __________ _________ eat less meat for dinner.9 What do you usually do _______ Saturdays?( )A. atB. onC. in10. I’m sorry I have to _______ for the English test.( )A. studyB. studiesC. studying. 11. Thanks for ___________.( )A. askingB. askC. asks12 A: Must I clean my room, mom?B: No, you ______.( )A. don'tB. needn'tC. aren't13. ( ) The girl isn’t short. She is __________ than before.A. shortB. tallC. tallerD. shorter14. ( ) Li Ming and Lin Tao _________ black eyes.A. hasB. have bothC. both haveD. both has15. ( ) John is ___________ than Peter. A. funnier B. fun C. funnyD. more funny16.( ) 4. My sister is __________ more outgoing than me.A. moreB. mostC. a littleD. little17 Who is ___________( heavy), Wang Lin or Lin Tao?18我姐姐和我一样。
EEC初二上册月考试题
英语试题二、单项选择(本题共15分，每小题1分)选择最佳答案。
( )21. Believe yourself. You ' re better than ________. You ' re the best. Wish you succeA. anyone elseB. some one elseC. else anyone( )22. Please read every sentence . The more ________ you are, the fewer mistakes you ' IImake.A. carefully ; carefullyB. careful ; careful.C. carefully ; careful ()23. —Do you know last ni ght?—Sorry, I don ' t know. But I think he should go to bed early because he will havean En glish exam this after noon.A. whe n he goes to bedB. whe n he went to bedC. whe n did he go to bed( )24. Over 400 million people have visited Disneyland parks around the world American Disn eyla nd ope ned in July 1955.A. afterB. beforeC. since( )25. —People say the subway (地铁) _________ buildi ng in Harbin in a few years.—Sounds _________ . I have n ever see n it before.A. will finish; interestingB. is finished; interestedC. will be finished; interesting( )26. —Shanghai has opened its ___________ TV channel (频道)that sends programs inforeig n Ian guages.—Great! I can improve my En glish over it.A. firstB. a firstC. the first( )27. — Tan Qianqiu, a politics teacher, died in order to save his four students in theearthquake(地震)in Wenchuan.—teacher he is!A. How excelle ntB. What an excelle ntC. What a excelle nt( )28. —There will be people in Beijing than usual because of all the visitors to theOlympics.—Right. We Chin ese should feel part of the Olympics and try our best to help!A. manyB. moreC. most( )29. While travelling to Canada, you should give yourself a day to ________ the time andknow the way n earby.A. used toB. be used toC. use to( )30. —The duty of Project Hope is to help poor children, isn ' t it?—Yes, it has built many schools _________ t hose childre n can study happily.A. whereB. whe nC. which( )31. —China ' s 24th scienee research team _________ at Changcheng Station on January 5,2008.—Won derful! Our scie ntists _______ a lot i n this field already.A. have arrived; improvedB. arrived; has improvedC. arrived; have improved( )32. Readi ng can in crease your words. When you read, you will find words repeat (重复) ________ and build up your vocabulary quickly.A. ourselvesB. itselfC. themselves( )33. If your friend tells a lie to you, you shouldA. tell a lie, tooB. talk with him and find out the reasonC. hit him on the headwith a sto ne( )34. The survey (调查)shows 200 students do different things before going to school inthe morni ng ______ of them practice En glish accord ing to the survey.A. 70B.120C. 140( )35. Which word of the following has a different stress from the others?A. Magic.B. Gesture.C. Attract.三、完形填空(本题共10分•每小题1分)根据短文内容选择最佳答案。
八年级上册全册全套试卷易错题(Word版 含答案)
八年级上册全册全套试卷易错题（Word版含答案）一、初二物理机械运动实验易错压轴题（难）1．某小组同学用小车、长木板、刻度尺、秒表、木块等器材探究小车沿斜面滑下时速度的变化；实验设计如图甲所示：让小车从斜面的A点由静止滑下并开始记时,分别测出小车到达B点和C点的时间t B、t C；（1）该实验的原理是________；（2）实验中应使斜面坡度保持较________(选填“大”或“小″)；（3）小车从A到B经过的路程为________ cm,若t A、t B、t C所对应的时间依次如图，则小车在AB、BC段的平均速度分别为v AB =__________m/s ；v BC= ________ m/s（保留两位有效数字）；（4）小车沿斜面滑下时速度的变化规律为：_____________________。
【来源】山东滨州阳信县2019-2020学年八年级（上）期末物理试题（教学质量监测）【答案】svt=小 40.0 0.13 0.20 在小车下滑过程中速度在变大【解析】【分析】【详解】(1)[1]测小车平均速度的实验原理是v=st。
(2)[2]斜面坡度越大，小车沿斜面向下加速运动越快，过某点的时间会越短，计时会越困难，所以为使计时方便，斜面坡度应较小。
(3)[3]由图知，小车通过AB的路程为：s AB=4.00dm=0.4m;s BC=4.00dm=0.4m；[4][5]小车通过AB、BC段的时间：t AB=t B-t A=10:35:03-10:35:00=3s;t BC=t C-t B=10:35:05-10:35:03=2s；所以小车通过AB、BC段路程的平均速度：v AB=ABABst=0.4m3s≈0.13m/s；vBC=BCBCst=0.4m2s=0.2m/s；(4)[6]由(3)知，小车在下滑过程中做加速运动，速度在变大。
2．小王在“测量小车的平均速度”的实验中，他已经从实验室借到的实验器材有：小车一辆、秒表一块、长木板一块、小木块一块。
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EEC初二上错题
一、单项选择
1. How will the weather ____ on Friday ? It will rain ____ .
A . be like , hardly
B . be , hard
C . be like , heavily
2.Now, most teenagers ____ up late surfing on the Internet .
You’re right. My son usually chat online _____ midnight.
A. stay , on
B. get , by
C. stay , at
3. Mike , dad is sleeping . The music is too ____ .
I see , I will _____ the CD player .
A. noise , turn off
B. noisy , turn on
C. noisy , turn down
4. What’s ____ over there ? _____ may be a cat .
A. that , That
B. this , That
C. that , It
5. Who’s singing in the next door ?
____ must be Dandan . She has a _____ voice.
A. She , sweet
B. She , sweetly
C. It , sweet
二、用所给词的适当形式填空
1.We’ve got a _______ ( heavy ) snow today than yesterday. (heavier)
2.It _______ (rain) cats and dogs at this time yesterday. (was raining )
3.The buy acted ________ (stange) last night . ( strangely)
4.It may start raining . Let’s go home _________ (quick) than before. ( more quickly)
5.Pandans ________ ( main ) live in China. (mainly)
6.We shouldn’t ______ (be) outside on stormy days . ( be)
7. We had better ________ (not go ) swimming in this river . ( not go )
三、句型转换
1.It’s going to rain all evening long in Harbin. (对划线部分提问)
_____ _______ is it going to rain in Harbin? ( how long )
2.I don’t play outside . Instead , I read at home. (同义句)
I read at home ______ _______ ________ outside. (instead of playing )
3. There was a heavy snow yesterday . ( 同义句)
It ______ ________ yesterday . ( snowed heavily )
４．I hope they are okay . ( 同义句)
I hope they are ______ _______ . (all right )
5. The storm is going to hit Seattle around 5 p.m. and will be over by midnight . (will stop ) The storm is going to hit Seattle around 5 p.m. and ______ _______ by midnight.
６.Today is Tuesday . (对划线部分提问)
___ ______ is today ? ( what day )
7. It’s 10 miles to the post office . (对划线部分提问)
____ _____ is ______ to the post office ? ( how, far , it )
8.They should avoid making the same mistake . (同义句)
They ______ _______ avoid making the same mistake . (ought , to )
9. You shouldn’t say those words . (同义句)
You _______ _______ _______ those words . (oughtn’t, to ,say)
10. Frank is always telling lies to others . (同义句)
Frank is always _______ ________ others . (lying to )
11. It’s going to be sunny tomorrow ? (对划线部分提问)
_____ the weather going to _____ tomorrow ? ( how’s , be )
四、根据汉语完成句子（每空一词）
１.午后可能会开始下雨。
It ______ start _____ in the afternoon.
２.我抬头看见浓密的乌云。
I _____ _____ and saw _____ black _____ .
３.我和弟弟推着自行车快速进到房间里。
My brother and I _______ the bike and _______ went ______ the house .
4. 主干道将被封闭。
The ______ road will ______ _______ .
5. 丹丹今晚可能拜访我们。
Dandan is ______ _____ visit us tonight .
五、改错（每题只有一处错误）
１.Mom has a headache , so we shouldn’t make much noisy . _________ (noise ) ２.The wind is very big . ___________ ( strong )
３.This is the week weather report in Beijing . ___________ (weekly)
４.I had bad cold and went see a doctor . __________ ( a bad )
５.Also , it is raining heavy now . _________ (heabily)
６.How high is the temperature ? It’s 5 degrees. _________ (how high --what)。