错题练习
一年级语文错题集
一年级语文错题集1.“十”有笔,加两笔变成。
2.“木”有笔,加一笔变成。
错误原因学生初次碰到这种新题型,有点不知所措。
尤其是学生还缺乏对知识的灵活运用能力。
改进措施对学生多进行这类加一笔、加两笔的练习,已达到熟能生巧的地步。
在此基础上,还可进行减一笔或减两笔的相关练习。
错例16:连一连拍跳跑骑拔高球车河步错误原因学生刚入学,对一节课要认识12个生字存在较大难度,好多字不认识,也就不能正确连线组词。
改进措施多采用形象生动的方法让孩子容易记住更多的生字,并督促家长积极做好每天的复习巩固工作。
错例17:连一连纸竹足真左身三沙送视zzhssh错误原因有一部分学生出现或多或少的错误,原因在于本班,外地生较多,口齿不清,发音不准,尤其是平翘舌音区分有难度。
改进措施在课堂上多进行平舌音及翘舌音的强化练习,加强个别指导。
错例18:选一选春天夏天秋天冬天1.草芽对小鸟说:“我是。
2.雪人对小朋友说:“我是。
3.谷穗对大地说:“我是。
4.荷叶对青蛙说:“我是。
错误原因一年级学生年龄小,知识面狭窄,对四季的景物概念模糊,从而有一部分学生会选错。
改进措施指导学生多读课外书,让家长利用双休日多带孩子去观察秋天的景物。
错题例第34例我会圈出正确的字。
(东冬)天朋(友有)(再在)见菜(园圆)(道到)路工(作做)经(常长)公(鸡鸡)错误原因对于这些音同而义不同的的生字大部分学生完全区分清楚存在较大难度。
尤其是道路的道、工作的作及经常的常。
改进措施在日常教学中多进行此类练习,多进行比较区分,多进行放入具体语境中加以运用的有效练习。
错题例第35例我会从句子中找出意思相反的词写在里。
1.远看山有色,近听水无声。
------- ------2.早上起来,面向太阳。
前面是东,后面是西。
左面是北,右面是南。
错误原因大部分小朋友虽然会找出反义词,但在填入的时候或出现书写错误,或出现拼读错误。
改进措施多对孩子进行作业认真完成及细心检查的习惯教育,并对此类型多进行练习,以期望达到举一反三灵活运用的程度。
数学初二练习题错题集
数学初二练习题错题集第一题:已知两条直线的斜率分别为 2 和 -2,且它们相交于点 (3, 4)。
求两条直线的方程。
解答:设两条直线的方程分别为 y = k1x + b1 和 y = k2x + b2,其中 k1 和k2 分别为斜率,b1 和 b2 分别为截距。
根据已知条件,我们可以列出方程组如下:4 = k1(3) + b1 --------(1)4 = k2(3) + b2 --------(2)k1 = 2 ----------(3)k2 = -2 ----------(4)根据方程 (3) 和 (4) 可知,b1 = 4 - 2(3) = -2b2 = 4 - (-2)(3) = 10因此,两条直线的方程分别为 y = 2x - 2 和 y = -2x + 10。
第二题:甲、乙两地相距 180 公里,甲地有一列火车,以每小时 80 公里的速度开往乙地,而乙地有一列火车,以每小时 100 公里的速度开往甲地。
两列火车同时出发后,多长时间后会相遇?解答:设两列火车相遇的时间为 t 小时。
根据已知条件,我们可以列出方程如下:80t + 100t = 180180t = 180t = 1因此,两列火车会在 1 小时后相遇。
第三题:若 a+b=5,a-b=3,求 a 和 b 的值。
解答:设 a 和 b 的值分别为 x 和 y。
根据已知条件,我们可以列出方程如下:x + y = 5 --------(1)x - y = 3 --------(2)将方程 (1) 和 (2) 相加得到:2x = 8x = 4将 x = 4 代入方程 (1) 可得:4 + y = 5y = 1因此,a 的值为 4,b 的值为 1。
第四题:某数的十分之一等于它的四分之三,求这个数。
解答:设这个数为 x。
根据已知条件,我们可以列出方程如下:x/10 = 3x/4化简得到:4x = 30x30x - 4x = 026x = 0x = 0因此,这个数为 0。
人教版四年级上册专项练习:错题集及分析
錯題:第一周:1、30000406讀作:三千萬零四零六三千萬四百零六分析原因:學生剛接觸億以內的讀數,對數位順表還不是很熟,顧上了萬級,卻顧不了個級。
特別是零出現很多個的情況下,學生就容易寫錯。
糾錯措施:讓學生記住數位表,並分級讀數。
改正:300000406讀作:三千萬零四百零六2、一百萬有10個(1千萬)。
分析:學生沒有仔細讀題,想當然以為是10個一百萬是多少。
改正:一百萬有10個(十萬)。
第二周1、服裝廠去年出口創匯一千萬零一百美元。
寫作:(1000100)分析原因:學生對寫數的方法還不夠熟練,沒有分級再讀,不夠仔細。
糾錯措施:讓學生對文字也進行分級,找到萬字,再寫數。
改正:服裝廠去年出口創匯一千萬零一百美元。
寫作:(10000100)2、三個“8”分別表示8個千萬、8個十萬、8個千的數是(C)。
A. 83688000B.80848400C.800808000分析:學生沒有分級就從高位開始看起,導致錯誤。
改正:B第三周1、5個千億和5個千組成的數寫作(50000005000 )。
分析原因:學生沒有分級寫數,導致漏了一個0。
糾錯措施:讓學生熟記數位表,左起右起都能記住。
再按數位寫數。
改正:5個千億和5個千組成的數寫作(500000005000 )。
2、89□0039079≈90億□裏可以填的數是(9 )。
分析原因:學生沒有理解題意,可以填的數不是唯一的。
糾錯措施:讓學生明白省略的尾數是那一部分,最高位是什麼,再判斷填什麼數。
改正:89□0039079≈90億□裏可以填的數是(5~9 )。
第四周1、一個蛋糕長5釐米,20個蛋糕排成一排長(100)釐米,就是(1)米。
那麼,(10000)個蛋糕排起來是1千米。
分析原因:學生對20個蛋糕排成一排長100釐米,就是1米的意思不理解。
糾錯措施:幫助學生理解第二條資訊的意思,知道排成一排1米需要20個蛋糕,那麼排1千米需要1000個20。
改正:那麼,(20000)個蛋糕排起來是1千米。
考试错题练习
第一单元达标卷一、口算 1.5×0.6=二、填空1、计算小数乘法是,一般先将其转化为整数乘法来计算,那么4.06×5.8可以转化为( )×( )。
3、3.64×1.7的积是( )位小数,得数保留整数约为( ),保留两位小数约是( )。
4、根据右边的竖式,直接写出( )内的数 293×8=( ) 2 9 3× 9 8 2 3 4 4+2 63 72 8 7 1 47、依依不行从家到学校需要0.45小时,她每天往还两次需要( )小时,一周5天共需要( )小时。
三、选择。
(将正确答案的序号填在括号里)每题1分,共6分。
3、天天超市一种苹果的价格是每千克7.98元,妈妈买了2.7千克,应付( )元。
A.21.546B.21.55C.21.6 五、解决问题6、为鼓励居民节约用电,某市采取分档收费,收费标准如下表:(2) 张老师家上月用电210千瓦时,电费是多少元?第三单元达标卷二、填空5、在小数2.4343,2.43,2.4343…,2.43中,有限小数有( )无限小数有( ),把这些小数用“>”链接起来是( )。
五、解决问题2、2018年11月19日,中国银行外汇牌价如下图,在这一天里:(2)一个书包标价3.9美元,100元人民币可以买几个书包?2016--2017学年上期新村.同创国际小学五年级数学1--4单元练习试题一、计算3.1×100=二、填空4、一只青蛙一张嘴,2只眼睛,4条腿,n只青蛙有()张嘴,()只眼睛,()条腿。
6、8.995精确到被分为是(),保留整数是()。
10、在>、<、=”。
2.78×0.9813、一个数的小数点向左移动一位后,所得的数比原数小6.75,原数是()。
七、解决问题1、王大娘家榨了65.6升采油,她准备分装在2.5升的瓶内去售卖,她最多能装满多少瓶?附加题2、五年级给优秀学生发奖品书,如果每个学生发5册还剩32册,如果其中10个学生每个人啊4册,其余每人发8册,就恰好发完,那么优秀学生有多少人?奖品书有多少册?2018--2019学年上期新村.同创国际小学五年级数学1--4单元练习试题二、填空14、小华在计算3.69除以一个数时,由于商的小数点向右对点了一位,结果得24.6.这道题的除数是()。
错题练习 - 副本
错题练习一、单选题(共20题;共40分)1.We'll _________ move to new apartments very soon!A. canB. couldC. be ableD. be able to2.In five years, Sally ______ a basketball player.A. wasB. isC. will beD. will3.How _______ milk and how _________ hamburgers do you need?A. much; muchB. much; manyC. many; manyD. many; much4.Please give me two ________.A. pieces of paperB. pieces of papersC. pieces paperD. piece papers5.There ________ a football game between Italy and Germany tomorrow morning.A. hadB. is going to beC. will haveD. has been6.There a football match on TV this evening.A. will haveB. is going to beC. hasD. is going to have7.My brother is going _________ to be a doctor.A. study medicineB. to study medicinesC. to study medicineD. studying medicine8.We are sure ________ the football match.A. winB. to winC. winningD. wins9.—How many birds can you see in the trees?—I can see __________ birds in them.A. hundreds ofB. five hundredsC. hundred ofD. five hundreds of10.I hope we'll study ________ home ________ computers in the future.A. in; withB. at; onC. at; withD. in; on11.— Would you like some milk?— Yes, just _______.A. a fewB. fewC. a littleD. little12.If it rains tomorrow, we ________ stay at home.A. is going toB. are going toC. willD. will be13.I don't like this pen. Please show me ________ one.A. otherB. the otherC. anotherD. the another14.— I think math is more useful than P. E.— I don't _________ you. They are both useful.A. get on withB. catch up withC. talk withD. agree with15.—How soon will he come back?—__________.A. After three daysB. In a weekC. On FridayD. Next month16.The farmer likes ______ vegetables in his garden, and they all ______ well.A. growing; grow upB. to grow; grow upC. growing; growD. to grow; grows17.Why did the child ________ crying last night?A. came onB. come onC. keep onD. kept on18.There is going ________ a science show this weekend.A. to beB. to haveC. to holdD. to see19.We should play a part in ________ the party.A. organizeB. organizingC. organizationD. organized20.This coat doesn't fit him well, as he has __________ a huge body and the coat is __________ small.A. so; suchB. so; soC. such; suchD. such; so二、填空题(共4题;共33分)用所给动词的适当的形式填空21. (1)—Is your home far from here? —Yes, it’s a little________ than yours. (2)—Do you know Zhao Wei?—Sure. She is the most popular ________ .(3)Last week’s talents show was a great ________(4)The movie ________ for three hours yesterday.(5)He lives in the ________ part of America.22.(1)You’d better ________(grow) some flowers behind the house.(2) Mike ________ (clean) the classroom now.(3) Isabelle always ________ (do) her homework in the evening.(4) I ________ (be) very busy yesterday.(5) Today ________ (be) Sunday.(6) Hi, Tara. Where ________ you ________ (go)?(7) The students________ (be) busy now. They ________ (have) an exam next week.(8)Pedro’s parents ________(not be) at home last night.(9) Loretta ________ (be) ill last week. She________ (be) much better now.(10)Let me ________ (carry) the box for you.three minutes.________ put in the ham cubes and lettuce and ________ them all up.24.①We are going to do more exercise________(keep) fit.②I am going to ________(be) a doctor when I grow up.③I’m going to practice________ (play) the guitar every day.④When did you learn ________(play) the violin?⑤—Shall we go to the movies tonight?—That________ (sound) interesting.三、语法填空(共20题;共21分)25.The old man keeps ________ (health) by eating well and exercising often.26.Mr. Green began to talk very ________ (serious) to his son.27.The Greens ________(visit) the museum next Monday.28.The result is very ________(surprise).29.We're making ________(prepare) for the physics exam.30.I want to know how ________(cook) meat.31.Could you cut the pear into two ________(half) ?32.How many ________(tomato) are there on the plate?33.Dale and Dave both like math and they dream of being________(science).34.Thanks for ________(tell) me the way to the post office.35.Put ________(they) on the sandwich, please.36.He's a ________(care) boy. He often leaves his school things at home.37.The newspaper comes out________(week). I buy it every week.38.________(one) peel some pears, then cut them up.39.There will be hundreds of________(factory) in the big city.40.The hotel was noisy. He ________(advise) us to change (换) it for another one.41.It's________(possible) for a little child to answer this difficult question.42.Don't throw (扔) dirty things into the river. They will________(pollute) the river.43.His name is James but he calls ________(he) Jim.44.We can do the work with________(little) money and ________(few) people than they can.四、选词填空(词汇运用)(共3题;共30分)(1)The dog ________ the box and I didn't find it.(2)She ________ her exam next week.(3)________, the boy told me about the thing.(4)Please cut the apple ________.(5)— Can you ________ it ________? — Certainly, I can.设计直升机world? Who knew more about the human body than most ________? There is an answer to all these questions——Leonardo da Vinci. You might ________what I said, but it is true.Leonardo was a great genius (天才). He didn't study at a(n)________. About 1,500 years ago, he lived in Italy. He had lots of ________. One of them was inventing (发明) things. One of his notebooks had drawings of a helicopter. Of course, he wasn't ________to build a helicopter with the things he had. But________said his idea worked.Leonardo wasn't just an inventor. He enjoyed painting. He was one of the greatest ________of his day. Whenhe was young, he was an excellent painter. As he ________he became more famous. Many of Leonardo's wonderful________are still with us today, for example, the smiling woman the Mona Lisa.We are going to have a party in our house this evening. It is my________birthday, and she has________my uncles and aunts and some of her________. Mother and I are________to cook most of the food for the party, and Father is getting the drinks ready. The living room looks very pretty. Balloons of all colors are hanging from the lights________we have taken the carpets away________we are going to dance there after dinner.In the dining room we have________out the best plates, glasses and tablecloths, and it looks________. We are going to have soup, fish, chicken, fruits and cheese. We are going to dance________midnight, and after that, we will have________food, because we will be hungry after all that dancing.Last year my mother________her birthday party in a restaurant,________it is more pleasant and________at home.When it is my birthday, I am going to invite my friends and have a party in the garden. I will hang colorful lights________the trees, and we will grill (烧烤)our food in the garden and dance________the grass.答案解析部分一、单选题1.【答案】D2.【答案】C3.【答案】B4.【答案】A5.【答案】B6.【答案】B7.【答案】C8.【答案】B9.【答案】A10.【答案】B11.【答案】C12.【答案】C13.【答案】C14.【答案】D15.【答案】B16.【答案】C17.【答案】C18.【答案】A19.【答案】B20.【答案】D二、填空题21.【答案】farther ;actor ;success ;lasted ;southern22.【答案】grow;is cleaning;does ;was;is;are;going ;are;are going to have ;were not;was;is ;carry23.【答案】learn;Let;First;pour;into;add;Next;for;Finally;mix24.【答案】to keep ;be;playing ;to play ;sounds三、语法填空25.【答案】healthy26.【答案】seriously27.【答案】will visit28.【答案】surprising29.【答案】preparations30.【答案】to cook31.【答案】halves32.【答案】tomatoes33.【答案】scientists34.【答案】telling35.【答案】them36.【答案】careless37.【答案】weekly38.【答案】First39.【答案】factories40.【答案】advised41.【答案】impossible42.【答案】pollute43.【答案】himself44.【答案】less;fewer四、选词填空(词汇运用)45.【答案】(1)ran away from(2)is worried about(3)In the end(4)in half(5)keep;to yourself46.【答案】painted;doctors;question;university;hobbies;able;scientists;artists;grew up;paintings47.【答案】mother's;invited;friends;asked;and;because;put;beautiful;until;more;had;but;cheaper;in;on答案解析部分一、书面表达1.【答案】Dear Tony,I'm very happy to receive your litter. Now let me tell you something about my life in ten years. I will be an artist when I grow up. I love the nature and I will draw all the beautiful things around us. I will live in Beijing in the future because the environment is better in this city. Also, my parents will live in an apartment with me. So we can enjoy all the great things together, I hope I will go somewhere else on vacation if I am free. I will show people what I see in the world with pictures.Yours,Li Hua 2.【答案】One possible versionOur lives will be different in 30 years. Scientific products will be used in daily life and they will bring us a lot of convenience. There will be a lot of robots to do the work, so people will have less work to do. And computers are much more important than they are now. We will use them to make important plans and other things. At thattime,we will use water and sunlight as the main energies. There won't be pollution any more., and then we can see the clear water, the blue sky all year round as many years ago.3.【答案】One possible version:Dear Liu MinI know your problem, i think you made two mistakes. First, you used your friend's pen without letting her know. Second, when you broke the pen, you didn't tell her about it.I think you should say sorry to her and tell her about the Whole thing. If you do, maybe she' l! be angry with you, but at least she' 11 know you' re kind and serious. Also. I think you should buy her a new pen. If you do, she'11 know that you're truly sorry.I hope my advice can help you.Yours,Linda。
小学三年级数学错题练习
46
+75
列竖式计算
进位加法
低
46
+715
11 1
个位相加正确,十位相加时,忘了加上个位进了1
6
电饭煲:168元;
电话机:259元;
微波炉:505元;
电磁炉:320元。
如果你有500元,可以买哪两样电器?请说明理由。
解决问题
进位加法
中
买电饭煲和电话机需要多少元?
168+259=427元
答:买电饭煲和电话机。
这些学生看题不仔细,看到“平均分给4位学生”,就认为平均分成了4份,根本没注意还有“一位老师ຫໍສະໝຸດ ,所以一共要平均分成5份37
小明家、小红家和学校在同一条笔直的路上,小明家离学校300米,小红家离学校120米,小明家到小红家有()米。
A、420 B、180
C、120 D、420或180
选择
总复习
难
小明家到小红家有(A)米。
三年级小朋友生活经验少,他们认为读课文《富饶的西沙群岛》
所需时间较少,从一楼走到三楼花费时间较多。
39
周长相等的两个长方形,它们的长和宽也一定相等。( )
判断
总复习
中
周长相等的两个长方形,它们的长和宽也一定相等。(√)
两个长方形周长相等,有的学生就想当然的认为它们的长和宽也相等。此题可结合操作题画两个周长为12厘米的不同的长方形,学生就会理解周长相等的两个长方形,它们的长和宽不一定相等。。
大部分学生想当然的认为小明家和小红家在学校的两旁,300+120=420米,没想到还有另一种情况,即小明家和小红家在学校的同一边,这时小明家到小红家有300-120=180米。
38
在一分钟的时间里,你能()
英语错题集(练习)
英语错题集选择题1.What your old school like?A. was B . did C. were2.I helped my mun a big meal yesterday evening?A. cookB. cooked C .cooking3.What judy’s old school like?A . was B. does ….C .did4.tokyo is bigger than Rome.A .more ……B. many …..C. much5.He likes very much ,he often on summer holiday.A. swim, go swimB. swimming,goes swim …C. swimming, goes swimming6.That is the national flag.Thecapital of is Rome.A. France,FranchB. French FranceC. France,France7.The lady lives 89 Qingyun Road.A. inB.to C .at8.There so much food today.A .is B. are C. have9.It was evening O’clock ,but I go to bed. I a lot of homework to do.A.could , haveB. could’d hadC. can’t had11. the population of china .A. What’s B How C how many12. you ill yesterday ? I didn’t see you at school.A WasB WereC Did二.用所给单词形式填空1.Are they going to go (swim) this Saturday?2.The children (paint)some pictures of animsls last Tuesday.3,Sally (study) in a new school next month.4Tomorrow the teacher ( tell) us a story.三、根据中文完成句子。
错题强化练习
1、每支笔7角,5元前最多能买()笔。
2、两个乘数都是8,积是()。
被除数和除数都是9,商是()。
两个加数都是8,和是()。
3、王老师带着6位小朋友去儿童公园玩,公园门票每张6元,一共要花多少元钱买门票?4、淘气买来一本书共56页,每天看5页,一个星期能看多少页?还剩多少页?5、工人叔叔修一条长81米的路,已经修了18米,还差多少米没有修?1、每支笔7角,5元前最多能买()笔。
2、两个乘数都是8,积是()。
被除数和除数都是9,商是()。
两个加数都是8,和是()。
3、王老师带着6位小朋友去儿童公园玩,公园门票每张6元,一共要花多少元钱买门票?4、淘气买来一本书共56页,每天看5页,一个星期能看多少页?还剩多少页?5、工人叔叔修一条长81米的路,已经修了18米,还差多少米没有修?7、一枝钢笔6元,一枝铅笔1元5角,买6枝铅笔和3枝钢笔,一共多少元?8、青青看一本70页的书,第一天看了25页,第二天看了30页,青青第三天看完,第三天看多少页?9、一个铅笔盒6元5角,小明用一张10元的钱买一个铅笔盒,应找回多少钱?10、有1元硬币5个,5角硬币5个,1角硬币5个。
拿6元,可以怎么拿?7、一枝钢笔6元,一枝铅笔1元5角,买6枝铅笔和3枝钢笔,一共多少元?8、青青看一本70页的书,第一天看了25页,第二天看了30页,青青第三天看完,第三天看多少页?9、一个铅笔盒6元5角,小明用一张10元的钱买一个铅笔盒,应找回多少钱?10、有1元硬币5个,5角硬币5个,1角硬币5个。
拿6元,可以怎么拿?11、4个5连加写成乘法算式是();4×3读作(),4和3都是(),表示()相加。
12、用两种方法表示3×5的意义。
13、一根绳子对折再对折,这时每折绳子长3米,这根绳子原来长多少米?14、4只兔子和5只鸭子共有几条腿?15、淘气看一本书,看了24页,剩下56页,这本书共有多少页?16、淘气看一本书,看了的页数是剩下的7倍,这本书共64页。
期中复习错题小练习
单选1.It’s terrible for him all day long.A.not to speakB. not speakC. without speakingD. not speaking1.her husband her son is so active as her. They don’t like to talk much.A.Not only, butB. Either, orC. Both, andD. Neither, nor2.---It is said that people in the Year of the Dog are loyal.---Yes, it true.A.born, may beB. were born, may beC. born, maybeD. were born, maybe4. Little Cai Qi impressed country her ability to dance.A. all the, byB. the all, withC. whole the, byD. the whole, with5. Qian Xuesen won high praise all the people because he devoted all his life science.A. from, toB. from, overC. by, toD. by, over6. after the traffic accident, some people are afraid of in front of the cars.A. sitting, /B. to sit, /C. sitting, theD. sit, the7. Do you know in a rainbow?A. how many colours are thereB. how many colours there areC. are there seven coloursD. if are there seven colours8. ---Do you mind if I smoke here?----A.No. The sign says: No smoking. C. Well, I’d rather you not.B.It’s kind of you to say so. D. Why not?9. In ancient China, people set off fireworks on New Year’s Eve that the loud noise could drive away bad spirits.A. in order toB. in hope forC. in the hopeD. hope10. Both red and black represent . But I prefer to wear red when I feel tired.A. powerfulB. powerC. peaceD. peaceful11. My father is very strict me, and he is strict his work.A. with, inB. with, withC. in, withD. in, in12. She has finished typing but she doesn’t know next.A. what to doB. how to doC. how she should doD. what should she do13. I know the name of the pretty girl, but I am not sure .A. how old is sheB. where does she come fromC. where she livesD. how tall is she14.We found useful English aloud every morning.A. it, to readB. it’s, readingC. that, readD. this, reading15. A smile costs , but it gives much.A. nothing, soB. something, suchC. anything, soD. everything, such16.---Finish your homework, you can’t play computer games.----OK, mum.A.butB. tillC. andD. or17. People dressed the baby boys blue in the hope that boys .A. will protectB. will be protectedC. would be protectedD. protected18.The price of the book is . It only costs five yuan.A. cheapB. lowC. highD. expensive19. This chair is made wood. The paper is also made wood.A. from, ofB. of, fromC. by , inD. from, from20. He is to explain it to me three times.A. patient enoughB. impatient enoughC. enough patientD. enough impatient21. Go downstairs, stand in line in the playground as soon as possible.A. andB. butC. soD. or22. When he was university student, he dreamed of becoming NBA player.A. an, aB. a, anC. an, anD. the, an23. My grandma didn’t go to sleep I got back home.A. whereB. untilC. as soon asD. while24. Sometimes people have great difficulty a place to park their cars.A. foundB. to findC. findingD. find25. ----Do you think Tom and Barry can be artists?------ Tom’s Barry’s personality is suitable for being an artist, I am afraid.A.Not only, but alsoB. Both, andC. Either, orD. Neither, nor26. ---When shall I hand in my report?----As soon as it tomorrow.A.will be finishedB. will finishC. is finishedD. finishes27.You can believe in Jack. We never doubt he is honest.A. weatherB. thatC. whetherD. if28. ----Let’s go fishing if it this weekend.---- But nobody knows if it .A.is fine, will rainB. will be fine, rainsC. is fine, rainsD. will be fine, will rain29.----Could you please tell me ?-------Yes, she came to teach here just last week.A.that she is a new teacherB. when did she come hereB.what is wrong with her D. whether she is a new teacher30. The expert reminds us the natural environment.A . of protecting B. to protect C. to be protected D. of being31. Work harder, you will get more grades in the coming exam.A. soB. butC. andD. or32. Blue looks good me while you look nice pink.A. on, inB. in, onC. in, inD. on, on33. Not only his parents but also his brother to the Great Wall. They haven’t been back.A. have beenB. have goneC. has goneD. has been34. Jerry devoted as much time as she could her classmates.A. to helpingB. helpC. to helpD. helping35.The computer requires . I think I need to ask Mr. Zhang for help.A. fixing, goingB. to fix, goingC. fixing, to goD. to fix, to go36. More and more couple would rather a second baby their first child can feel less lonely.A. have, in order toB. to have, in order toC. have, so thatD. to have, so that37. –Excuse me, sir. When can we have a swim in the pool?---Not until it next month.A.repairsB. will repairC. is repairedD. will be repaired38.---Mr.Ma has gone to Guangzhou on business.----Really? Do you know ?A.who did he go withB. when he came back D. how soon will he come backC.whether he went there by train39. ----Simon, what do I need to take for the hiking?----You’d better more water than usual. It's hot today.A.to takeB. takeC. takingD. took40. ---Which would you like, a cup of coffee or a bottle of orange, Jane?---- . I’d just like a cup of tea.A.EitherB. BothC. NoneD. Neither41. She wears red today. Maybe she feels weak and stressed.A. a little ofB. a little bit ofC. a bitD. a bit little42. Could you tell me a meeting in Guangzhou next week?A. whether is there going to beB. whether there is going to haveC. if there was going to beD. if there is going to be填词1.Let’s look at the(日历) to make a better plan.2.This book offers (practice) advice to people with health problem.3.Don't be so (patient) to the old. Talk with them as much as you can.4.Without the teachers’ help, I will (certain) fail the exam.5.He pushed away the large stone with all his .(strong)6.Nobody Tina is the best person to be the President of the Students’Union. (怀疑)7.It is very important to (pronunciation) all the new words in the right way.8.It is necessary for us to get enough sleep if we want to be (energy)9.The small towns are c with each other by road.10.Our class begins and ends at (not changing) times.11.He (分成) the cake into pieces and gave them to his children.12.Children are easily (影响) by their friends.13.Taking care of a pet dog (需要) a lot of care and attention.14.It’s impolite to ask (person) questions about others.15.He was a man of (wise) and changed the world a lot.16.Each student had to give a short (speak) to introduce himself to his newclassmates.17.You may become confident if you (succeed) complete a difficult taskthrough hard work.18.You must think twice before making (decide)19.What a terrible (decide) he made. He should not refuse the (invite).20.His mother got even (mad) after his father’s .(die)21.Mum allows me (play) computer games after I finish all my homework.22.Our maths teacher never smiles and he is (严厉的) of all the teachers.23.Thank you for your .(建议) It is very useful to me.24.She had lots of (choose), but she chose none at last.25.Some of my friends always dream of (win) the lottery.(彩票)26.He is so (care) and he often makes mistakes in his homework.27.Becoming a doctor requires (大量的) time and training.28.(通过) hard work, he became the leader of the team.29.China had many great a in exploring the sea.30.With the help of the teacher, the boy s in passing the exam.31.If the medicine (凑效), you can keep on taking it.32.I don't know w he is a good helper or not.33.The sign reminds me (not park) here.34.The news kept (影响) him a lot was from a little girl.35.I’ve grown up but my parents are (严格) with me than before.36.A year is d into 12 months.37.When I saw him, he (wait) for the bus at the bus stop.38.He has made little progress (simple) because he was crazy aboutcomputer games.39.They often meet and share their (think), feelings and experiences.40.I don’t know what I should pay attention to (reduce) the pollution.41.My mother preferred drawing to (dance) when she was in middle school.42.Jack used to be a bright and (live) boy, but now he is always silent.翻译句子43.妈妈告诉我,这周末除了在家练习弹钢琴别无选择。
五年级错题集
第一单元小数乘法【错题1】【错误做法】0.72×5=36【成因分析】部分学生对小数乘法计算不熟悉【解决对策】理解计算法则.多练习。
【正确做法】【错题2】一块正方形塑料板,边长是1.5米,它的面积各是多少?【错误做法】1.5×1.5=22.5【成因分析】面积计算小数位数错误【解决对策】复习正方形周长和面积,正确计算。
【正确做法】1.5×1.5=2.25【错题3】在地球上1千克的物体到月球上约重0.16千克。
在地球李老师的体重是65千克如果在月球上大约重多少千克?【错误做法】65×0.16=104【成因分析】部分学生题意不理解不能例式【解决对策】理解题意.正确列式。
【正确做法】65×0.16=10.4【错题4】4 1.5×105【错误做法】 1.5×105=1.5×(10+5)=1.5×10+5=15+5=20【成因分析】学生对乘法运算定律不理解不能灵活运用【解决对策】理解运算定律多练习。
【正确做法】 1.5×105=1.5×(10+5)=1.5×10+1.5×5=15+7.5=22.5【错题】【错误做法】【成因分析】不够理解计算运算顺序。
【解决对策】多练习。
【正确做法】56×1.3=72.8(千米/时)第二单元 小数除法【错题】5 0.98÷0.2 【错误做法】【成因分析】学生不能分析题目数据,不能灵活运用运算定律 【解决对策】理解题目和运算定律多练习。
【正确做法】【错题】6 84÷15 【错误做法】 84÷15=36【成因分析】整数除以整数商是小数不会【解决对策】根据小数的性质在整数后点上小数点加上0做 【正确做法】84÷15=3.6【错题7】 62.5÷25 0.81÷27【错误做法】62.5÷25=25 0.81÷27=0.3【成因分析】小数除以整数商是小数不够熟练,商的小数点漏掉 【解决对策】多练习养成良好的计算习惯【正确做法】 62.5÷25=2.5 0.81÷27=0.03【错题8】 3.9÷1.5 【错误做法】 3.9÷1.5=26【成因分析】小数除以小数计算法则学生不够熟练运用 【解决对策】理解法则正确计算 【正确做法】3.9÷1.5=2.6【错题9】 22.3÷99【错误做法】 22.3÷99=0.22525……【成因分析】用循环小数表示不够熟练循环节找不出【解决对策】多练习用循环小数表示数。
三年级期末错题2
三年级上学期期末错题练习(2)一、填空题1、甲、乙两桶油共重118千克,甲桶倒出2千克油后和乙桶油同样重。
原来甲桶油重()千克。
2、一道除法算式,除数是6,小强错把除数看成了4,得到的商是193余2,正确的结果是()。
3、用一个水杯向空瓶中倒水,倒进3杯水,连瓶重565克,倒进5杯水,连瓶重775克。
一杯水净重()克。
4、一块木料长40厘米,把它锯成8厘米的小段,要锯()次。
5、把得数大约是3000得算式圈出来(492×6 213×9 7×580 5×602)6、用一根20米长的绳子围成一个正方形,正方形的边长是()厘米。
7、升旗时国旗的运动();钟摆的运动();光盘在电脑里的运动()。
8、在算式□÷7=13......Ο中,Ο最大是(),这时□是()。
9、小丽4分钟做了92道题,小娟5分钟做了100道题,两人的速度()比较快些。
10、小文看一本书,第一天看了20页,以后每天都比前一天多看5页。
他第三天应该从()页开始看起。
11、把一个边长为6cm的正方形沿对角线对折后,得到两个完全一样的()。
12、557÷5的商的最高位是()位。
13、要使□42×3的积是三位数,□里可以填();要使□13×3的积是四位数,□了最小填()。
二、判断题1、四边相等的图形是正方形。
()2、6□5÷3,要使商的中间有一位是0,□里只能填1或2. ()3、对折后折痕两边面积完全相等的图形是轴对称图形。
()4、被除数末尾有0,商的末尾一定有0. ()三、选择题1、一个皮球从32米的高处落下,如果每次弹起的高度总是它下落高度的一半,那么它第三次弹起()米。
A.8 B . 4 C. 22、下面的英文字母,可以看成轴对称图形的有几个()个。
A C T M N S XA.4B.5C.63、小朋友手拉手围成一个圈做游戏,每相邻两个男生间有一个女生,如果男生有10个,那么女生有()个。
四年级错题整理
四年级错题整理
一、加减法
1. 一个书包45元,一个文具盒9元,书包比文具盒贵多少元?
答案:36元
2. 食堂运来80筐蔬菜,运来的萝卜是蔬菜的2倍,萝卜有多少筐?
答案:160筐
3. 一件衣服用布2米,20米布可以做几件衣服?
答案:10件
4. 一个菜园有8块菜地,平均每块菜地种85棵白菜,一共有多少棵白菜?
答案:680棵
5. 一盒巧克力有12块,把5盒巧克力平均分给6个同学,每人可以分到多少块?
答案:10块
二、乘除法
1. 一本书有25页,小明每天读8页,他几天能读完?
答案:3天
2. 一个足球78元,学校买了3个足球,一共花了多少钱?
答案:234元
3. 一辆汽车每小时行驶60千米,它从上午8点出发,行驶了3小时,一共行驶了多少千米?
答案:180千米
4. 一条裙子用布1.5米,15米布可以做多少条裙子?
答案:10条
5. 一瓶牛奶2元,小华拿10元钱买了4瓶牛奶,应找回多少钱?答案:2元。
名卷精编错题练习
名卷精编错题练习满分84分,合格67分一、单项选择题2.甲公司2021年12月15日与乙公司签订商品销售合同。
合同约定,甲公司应于2022年5月20日前将合同标的商品运抵乙公司并经验收,在商品运抵乙公司前发生毁损、价值变动等风险由甲公司承担。
甲公司该项合同中所售商品为库存 W 商品, 2021年12月25日,甲公司根据合同向乙公司开具了增值税专用发票并于当日确定了商品销售收入。
W商品于2022年5月10日发出并于5月15日运抵乙公司验收合格。
对于甲公司2021年W商品销售收入确认的恰当性判断,除考虑收入确认条件的符合性以外,还应考虑可能违背的会计基本假设是 [单选题] *A.会计主体B.货币计量C.会计分期(正确答案)D.持续经营4.某企业期初资产总额为750万元,本期发生下列经济业务:(1)融资租人设备一台,以55万元人账;(2)申请并取得一张银行汇票,面值30万元;(3)企业发出材料一批,价值10万元,用于委托外单位加工本企业产品。
发生上述业务后,该企业的资产总额为 [单选题] *A.750万元B.805万元(正确答案)C.835万元D.845万元5.2022年10月20日,某企业出纳员填制一张金额为105870元的转账支票,用于支付企业货款,下列对该支票正面填写,不正确的是 [单选题] *A.正联“出票日期”:贰零贰贰年零壹拾月零贰拾日B.正联“签章”单位财务章和法人章C.正联“用途”填写:支付企业货款D.正联“金额大写”:壹拾万零伍仟捌佰柒拾元零角零分(正确答案)6.下列关于明细账登记的说法,不正确的是 [单选题] *A.明细账的登账依据有原始凭证,汇总原始凭证和记账凭证B.明细账簿一般采用活页式账簿C.库存商品、原材料等财产物资明细账需要登记数量和单价,所以只能根据审核无误的原始凭证逐日逐笔登记(正确答案)D.横线登记式明细分类账适用于需要进行逐笔对应反映的业务,如其他应收款、应收票据、应付票据等7.下列关于错账更正的方法,正确的是 [单选题] *A.账簿登记金额错误,可以用褪色药水消除或者重新抄写账页B.账簿登记中,对错误的文字或数字可以进行涂改、挖补、刮擦C.记账凭证中金额多记的,用红字填制记账凭证并登账,冲销原多记金额(正确答案)D.记账凭证中金额少记的,用红字填制记账凭证并登账,补充少记金额13.甲、乙公司均为增值税一般纳税人。
物理初三错题练习题
物理初三错题练习题1. 某物体以10 m/s的速度向前运动,经过3秒后速度变为15 m/s。
a) 物体的加速度是多少?b) 物体在3秒内移动的距离是多少?解析:a) 加速度的定义是速度变化量除以时间,即 a = (v - u) / t,其中 u 是初始速度,v 是终止速度,t 是时间。
根据题目给出的数据,速度变化量为 v - u = 15 m/s - 10 m/s = 5 m/s,时间为 3 秒。
代入公式计算可得:a = (5 m/s) / (3 s) ≈ 1.67 m/s²b) 物体在匀加速运动下的位移可以用公式 s = ut + (1/2)at²来计算,其中 s 是位移,u 是初始速度,t 是时间,a 是加速度。
根据题目给出的数据,初始速度为 10 m/s,时间为 3 秒,加速度已经计算出为 1.67 m/s²。
代入公式可得:s = (10 m/s)(3 s) + (1/2)(1.67 m/s²)(3 s)² = 30 m + 7.5 m = 37.5 m因此,答案为:a) 物体的加速度是 1.67 m/s²b) 物体在3秒内移动的距离是 37.5 m2. 某车以20 m/s的速度行驶,在3秒内加速度为4 m/s²,求此车在3秒内的位移。
解析:根据题目给出的数据,初始速度 u = 20 m/s,加速度 a = 4 m/s²,时间 t = 3 秒。
物体在匀加速运动下的位移可以用公式 s = ut + (1/2)at²来计算。
代入数据计算可得:s = (20 m/s)(3 s) + (1/2)(4 m/s²)(3 s)² = 60 m + 18 m = 78 m因此,此车在3秒内的位移为 78 m。
3. 一个物体以30 m/s的速度运动,经过5秒后速度变为10 m/s,求这个物体的加速度。
错题改正练习题
错题改正练习题1. 关于负责人的职责,以下说法错误的是:A. 负责人应将部门员工的工作调动、奖惩和考核工作进行合理的安排和组织。
B. 负责人应及时向上级领导反馈部门的工作情况和成果。
C. 负责人应对员工的工作进行有效的指导和培训,提高团队的整体素质。
D. 负责人应根据需要安排并组织有效的会议,以便部门成员之间的沟通、协作和合作。
答案: A2. 关于项目管理的概念,以下说法正确的是:A. 项目管理是指进行计划、组织、执行、控制和结束项目的过程。
B. 项目管理主要关注项目的技术和产品开发。
C. 项目管理只涉及工程类项目,不适用于其他类型的项目。
D. 项目管理的目标是实现项目的计划和目标,而不考虑时间和成本。
答案: A3. 下面哪个选项不是目标明确的特点:A. 目标具体明确B. 目标可量化衡量C. 目标与组织整体目标一致D. 目标缺乏时效性答案: D4. 战略管理是指:A. 组织根据其内部优势和外部机会进行长期决策和规划的过程。
B. 制定和实施组织长期发展方向和目标的过程。
C. 对组织内各个部门进行资源配置和协调的过程。
D. 针对组织内外环境的变化进行快速响应和调整的过程。
答案: B5. 公司内部信息的保护需要:A. 定期更新公司内部信息保护政策和制度。
B. 确定合适的信息存储和访问权限。
C. 加强员工的信息安全意识培训。
D. 所有选项都是正确的。
答案: D6. 以下哪项不属于有效的团队沟通方式:A. 通过电子邮件进行信息交流。
B. 召开定期的团队会议进行讨论和协调。
C. 进行线上群聊交流。
D. 采用口头沟通方式。
答案: A7. 以下不属于有效的研究方法的是:A. 阅读相关的书籍和资料。
B. 参加相关的培训课程和讲座。
C. 反复进行练和实践。
D. 依赖他人完成研究任务。
答案: D8. 成功的项目经理需要具备的能力包括:A. 领导能力和团队合作能力。
B. 技术专业知识和项目管理知识。
C. 沟通能力和问题解决能力。
错题重点练习
解决问题姓名:
1、小红说:我吃了6个苹果,还剩7个。
原来有多少
个苹果?
2、
原来多少个桃子?
3、
4、小明跟妈妈一共吃了7个包子,还剩6个。
原来有
多少个包子?
5、小红买了9个本子后,还剩5个,原来有多少本子?
6、
7、
8、
9、
10、
11、排成一队,李红排第12,李明排第18,他们之间
有几人?
我吃了8个桃子,还剩3个。
12、填空
(1)在12-9=3中,被减数是()减数是()差是()
( 2 ) 在15-9=6中,被减数是()减数是()差是()
( 3 )在19-9=10中,被减数是()减数是()差是()
( 4 )在9+8=17中,加数是()()和是()
(5)在4+7=11中,加数是()()和是()
( 6 ) 14前面一个数是()14后面一个数是()
( 7 ) 18前面一个数是()18后面一个数是()
( 8 ) 10前面一个数是()10后面一个数是()13、按顺序填数(1)
(2
)
(
3)
(
4)。
六年级数学常见错题专项练习
六年级数学常见错题专项练习一、填空。
(每空1分,共29分) 姓名: 1、“美术组人数的57和绘画小组的人数相等”,是把( )看作单位“1”。
“九月份实际用电节约了110”,这里的110表示( )是( )的110,数量关系式是( )×110=( ). 2、六(2)班的女生人数是男生的25,那么男生人数是女生的( )( ),女生人数占全班的( )( )。
3、六年级人数的23与五年级人数的25相等,六年级人数占五年级人数的( )( )。
4、甲仓库存粮比乙仓库多14,那么乙仓库存粮比甲仓库少( )( ),乙仓库存粮与两仓库总数的比是( )。
5、已知A ×78=B ×87=C ÷89,且A 不为0,把A 、B 、C 三个数按从大到小的顺序排列起来( )。
6、一个块长方形铁皮,长40厘米,宽30厘米,从四个角上各剪去一个边长为6厘米的正方形,然后做成一个无盖的长方体盒子,这个盒子的体积是( )。
7、一个长方体玻璃缸,从里面量长40厘米,宽25厘米,缸内水深12厘米。
把一块石头浸没水中,水面升到16厘米。
石块的体积是( )。
8、一堆煤12吨,用去23,用去( )吨,还剩总数的( )( );一堆煤12吨,用去23吨,还剩( )吨。
9、把一个长10厘米,宽8厘米,高3厘米的长方体平均分成两个长方体,表面积最少增加( )平方厘米,最多增加( )平方厘米。
10、把一个正方体木块的表面全涂成红色,然后切成27个小正方体(如图),那么两面是红色的小正方体有( )个,一面是红色的小正方体有( )个。
11、已知○+○+○+○+□+□=56,○+○=□+□+□。
那么○=( ), □=( )。
12、1只猪的重量相当于3只狗的重量,1只狗的重量相当于4只猫的重量,( )只猫的重量相当于1只猪的重量。
13、甲乙两数的和是120,甲数是乙数的15,甲数是( ),乙数是( )。
14、一台拖拉机13小时耕地16公顷,1小时耕地( )公顷,耕地1公顷需要( )小时。
初中错题集(选择题)
三、错题集(选择题)1、如果ab>0,那么a、b中的个数为();A:0;B:1;C:2;D:0或2;2、一个有理数和它的相反数的积();A:符号必为正;B:符号必为负;C:一定大于0;D:一定小于0;3、一个有理数的平方是正数,那么这个有理数的立方是();A:正数;B:正数或负数;C:负数;D:整数;4、一个两位数,将其个位数字与十位数字对调,则所得新数和原数的差一定()。
A:能被8整除;B:能被9整除;C:能被10整除;D:能被11整除;5、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±0.3)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:0.4Kg;6、一个有理数和它的相反数的积();A:符号化为正;B:符号化为负;C:一定不大于0;D:一定不小于0;7、在|a|,|a+100|,-a2+100,-a2-1中,一定不是0的有();A:1个;B:2个;C:3个;D:4个;8、下列结论错误的饿是();A:若-x>0,则x<0;B:-x<0,则x>0;C:|x|≥x,则x为全体有理数;D:若a=-a,则a无值可取;9、如图1,在长为a的正方形中挖掉一个边长为b的小正方形(a>b),把余下的部分剪拼成一个矩形(如图2),通过计算两个图形(阴影部分)的面积,验试了一个等式,则这个等式是();一课一练P43 A:a2-b2=(a+b)(a-b);B:(a+b)2=a2+2ab+b2;C:(a-b)2=a2-2ab+b2;D:(a+2b)(a-b)=a2+ab-ab2;10、某种细菌在培养过程中,每半小时分裂1次,每次一分为二,若这种细菌由1个分裂到16个,那么这个过程要经过();A:1.5小时;B:2小时;C:3小时;D:4小时;11、单项式5x2-3x-5加上-3x后等于();A:5x2-5;B:5x2-6x-5;C:5+5x2;D:5x2-6x+5;12、甲、乙两人分别从长为1600m得街道两头同时相向而行,甲骑自行车的速度是每小时20Km,乙步行4分钟后两人相遇,求乙步行的速度,若设乙步行的速度是每小时xKm,则下列方程正确的是();A:20×4+4=1600;B:20×4+4x=1.6;C:20×4/60+4/60x=1.6;D:20×4/60+4/60x=1600;13、某商品进价400元,标价为600元,折价销售时得利润率为5%,问此商品是按几折销售得?设此商品按x%销售,则下列方程正确得是();A:600×x%=400×5%;B:400(1+5%)=600×x%;C:400(1-5%)=600×x%;D:600-(1-5%)=400×x%;14、甲、乙两人练习短距离赛跑,测得甲每秒跑7m,乙每秒跑6.5m,如果甲让乙先跑2秒,那么几秒钟后甲可以追上乙?若设x秒后甲追上乙,列出得方程应为();A:7x=6.5;B:7x=6.5(x+2);C:7(x+2=6.5x);D:7(x-2)=6.5x;15、下列说法中,正确的有();①圆锥和圆柱的底面都是圆,侧面都是曲面;②棱锥的底面边数与侧面棱数相等;③棱柱的上、下底面是形状、大小都相等同的多边形;④棱锥的各面都是三角形。
英语错题汇总
第十二周错题Other/ others / the others / the other/ another 专项练习1..Some people like to rest in their free time.______ like to travel.A.OtherB.ther othersC.OthersD.Another2.This cake is delicious!Can I have_______ piece,please?A.otherB.anotherC.othersD.the other3.Where are ______ boys?A.the otherB.the othersC.othersD.another4.The supermarket is on _____ side of the street.A.otherB.anotherC.the otherD.others5.There were three books on my table.One is here.Where are ___?A.othersB.the othersC.the otherD.another6.Please give me ____ chance.A.otherB.the otherC.anotherD.the others7.He was a wonderful teacher.Everyone agreed it would be hard to find ____ like him.A.anotherB.other C the other D.the others7.Great changes have taken place in China.who can tell _____ it would be like in _____ five years?A.how; otherB.what; moreC.how; anotherD.what; another9..Mr.Turner bought two bikes.One was for his wife,and ____was for his son.A.anotherB.otherC.the otherD.one10.Tom,you should know how to get on well with _____.A.anotherB.othersC.the otherD.other11.--- Would you like _____ apples?---- ______,please.A.some more; Another twoB.any more; Two moreC.another; two moreD.some more; Other12.We have ten foreign students in our school.One is from America,____ is from Australia andall ______ students are from England.A.another; the othersB.one; anotherC.another; the otherD.one; other’s13.Students are usually interested in sports. Some like running,some like swimming,and _____ like ball games.A.the othersB.othersC.the otherD.other14..There are twenty-eight students in the class.Ten of them are girls and _____ are boys.A.the otherB.the othersC.othersD.other15.I don’t like this pen.Would you please show me ___ one?A.anotherB.the otherC.otherD.others16.These cups are ours.Those are ______.A.othersB.other’sC.others’D.others’s17.I have six coloured pencils; one is blue,another is red,and _____ are green.A.othersB.anotherC.othersD.the others18.---- Have you finished your report yet?---- No.I’ll finish it in ______ ten minutes.A.anotherB.otherC.moreD.less19..--- Did all the students in your class pass the test?---- Some of them did.______ didn’t.A.AnotherB.The othersC.Some otherD.Others错题1.________________ (...的数量) of the people who drive cars ________(be) getting larger and larger.2.________________ (...的数量) of sleep for some people __________ (be) getting smaller and smaller.3.We will have the final exams in two __________ (month)time.4.Besides physics, there are some other subjects __________ (teach)in English.5.服用此药前,请仔细阅读说明。
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1.用适当的方法解下列方程:(第1题与第15题)
(1)9(x -1)2=5;(2)6x 2+2x =0;(3)x 2-8x +11=0;(4)(x -3)2+x 2=9.
3.关于x 的一元二次方程x 2
+3x +m -1=0的两个实数根分别为x 1,x 2.(第9题) (1)求m 的取值范围;
(2)若2(x 1+x 2)+x 1x 2+10=0,求m 的值. 2.(第3题)如图所示,点A 、B 、C 在圆O 上,∠A =64°,则∠BOC 的度数是( )
4.(第3题)(1)如图,将直角三角板60°角的顶点放在圆心O 上,斜边和一直角边分别与⊙O 相交于A 、B 两点,P 是优弧AB 上任意一点(与A 、B 不重合),则∠APB =________.
(2).如图,点A 、B 、C 是⊙O 上的点,OA =AB ,则∠C 的度数为________.
(3).如图,在⊙O 中,AB ︵=AC ︵,∠BAC =50°,则∠AEC 的度数为( )
(4).如图,△ABD 的三个顶点在⊙O 上,AB 是直径,点C 在⊙O 上,且∠ABD =52°,则∠BCD 等于( )
5.(第8题)(1)如图,⊙O 的直径CD 垂直弦AB 于点E ,且CE =2,DE =8,则AB 的长为( )
(2).如图,AB 是⊙O 的直径,弦CD ⊥AB 于点E ,OC =5 cm ,CD =6 cm ,则OE =________cm.
(3).如图,AB 是⊙O 的直径,CD 为⊙O 的一条弦,CD ⊥AB 于点E ,已知CD =4,AE =1,则⊙O 的半径为________.
6.(第4题)(1)如图,点B 在反比例函数y =2
x (x >0)的图象上,过B 分别向x 轴,y 轴作垂
线,垂足分别为A ,C ,则矩形OABC 的面积为( )
(2).如图,点A 是反比例函数y =k
x 图象上的一个动点,过点A 作AB ⊥x 轴,AC ⊥y 轴,垂
足分别为B 、C ,矩形ABOC 的面积为4,则k =________.
(3).如图,已知点A 在反比例函数图象上,AM ⊥x 轴于点M ,且△AOM 的面积为1,则反比例函数的解析式为________.
(4).如图,在平面直角坐标系xOy 中,正方形OABC 的边长为2,写出一个函数y =k
x (k ≠0),
使它的图象与正方形有公共点,这个函数的表达式为________.
7.(第5题)(1)已知扇形的圆心角为45°,半径长为12,则扇形的弧长为( ) (2)一个扇形的半径为8 cm ,弧长为16
3π cm ,则扇形的圆心角为( )
(3)若扇形的面积为3π,圆心角为60°,则该扇形的半径为( )
8.(第6题)写出下列抛物线的开口方向、对称轴和顶点坐标. y =-1
2
x 2+x -4; y =-x 2+2x +3; y =-2x 2-8x -6
9. (第11题)(1)在同一平面直角坐标系内,将函数y =2x 2+4x -3的图象向右平移2个单位,再向下平移1个单位,得到图象的顶点坐标是( )
(2).把抛物线y =x 2+bx +8的图象向右平移3个单位,再向下平移2个单位,所得图象的解析式为y =x 2-2x +3,则b 的值为________
10.(第12题)(1)在同一平面直角坐标系中,函数y =x -1与函数y =1
x
的图象可能是( )
(2)左下图是反比例函数y =k
x (k 为常数,k ≠0)的图象,则一次函数y =kx -k 的图象大致是
( )
(3)已知k 1<0<k 2,则函数y =k 1
x
和y =k 2x -1的图象大概是( )
11.(第16题)如图,一次函数y =kx +b(k ≠0)的图象过点P(-32,0),且与反比例函数y =
m
x (m ≠0)的图象相交于点A(-2,1)和点B.
(1)求一次函数和反比例函数的解析式;
(2)求点B 的坐标,
(3)求三角形APO的面积
(4)并根据图象回答:当x在什么范围内取值时,一次函数的函数值小于反比例函数的函数值?
12.(第18题)(1)为落实国务院房地产调控政策,使“居者有其屋”,某市加快了廉租房的建设力度.2013年市政府共投资3亿元人民币建设了廉租房12万平方米,2015年投资6.75亿元人民币建设廉租房,若在这两年内每年投资的增长率相同.
(1)求每年市政府投资的增长率;
(2)若这两年内的建设成本不变,问2015年建设了多少万平方米廉租房?
(2)电动自行车已成为市民日常出行的首选工具.据某市品牌电动自行车经销商1至3月份统计,该品牌电动自行车1月份销售150辆,3月销售216辆.
(1)求该品牌电动车销售量的月平均增长率;
(2)若该品牌电动自行车的进价为2 300元,售价2 800元,则该经销商1月至3月共盈利多少元?
13. (第19题)如图,在Rt△ABC中,∠C=90°,∠BAC的平分线AD交BC边于点D,以AB 上一点O为圆心作⊙O,使⊙O经过点A和点D.
(1)判断直线BC与⊙O的位置关系,并说明理由.
(2)若AC=3,∠B=30°.
①求⊙O的半径;
②设⊙O与AB边的另一个交点为E,求线段BD,BE与劣弧DE所围成的阴影部分的面积.(结果保留根号和π)
14.(第22题)如图,某中学准备在校园里利用围墙的一段,再砌三面墙,围成一个矩形花园ABCD(围墙MN最长可利用25 m),现在已备足可以砌50 m长的墙的材料,试设计一种砌法,设AB长为x米,使矩形花园的面积为y平方米.
(1)求y与x的函数关系式,写出自变量x 的取值范围
(2)怎样才能使长方形花圃的面积最大?最大值为多少?。