1. Tom was _____ to spend his weekend in that small village.
a. suggested
b. hoped
c. demanded
d. advised
2. In our childhood, we were often _____ by Grandma to play attention to our table manners.
a. demand
b. reminded
c. allowed
d. hoped
3. ---- Can you do me a favor and take these books to my office. ---- _____
a. for pleasure
b. I can
c. my pleasure
d. with pleasure
4. If you can____ what the teacher teach ____, you’ll make rapid progress.
a. make, yours
b.let, yourself
c.let, yours
d.make, yourself
5. ----Julia said she sent you a birthday card yesterday, have you got it?
---- oh, really? I haven’t ______ my mail box yet.
a. examined
b. received
c. tested
d. checked
6. My luggage was _____ when I entered the country.
a. close examined
b.close checked
c. closely examined
d. closely checked
7. I’m ______ hungry. Give me_______ of orange.
a. a bit, a little
b. not a little, a bit
c. little, a bit
d. not a little, a little
8. He hasn’t slept at all for three days. ___he is tired
out.
a. There is no point
b. There is no need
c. It’s no wonder
d. It’s no way
9. As I will be away for at least a year, I’d appreciate hearing from you _____ telling me how everyone is going on.
a. by and by
b. more or less
c. now and then
d. at the same time
10. My suggestion is that, as we did last year, we ____ the new year with a dance party.
a. congratulated
b. celebrated
c. congratulate
d. celebrate
11. For almost eight years, the city___ dogs from being taken into it only to find that it’s of no use
a. has tried to prevent
b. has been trying to prevent
c. had been trying to prevent
d. had tried to prevent
?When the old man ____ to walk back to his house, the sun ____ itself behind the mountain.
a. started, had already hidden
b. was starting , hid
c. had started, was hiding
d. had started, had already hidden
?The policeman’s attention was suddenly caught by a small box which ___ place under the Minister’s car.
a. has been
b. was being
c. had been
d. would be
?----You have agreed to go, so why aren’t you getting ready?
----But I_____ that you ____ us to start at once.
a. don’t realize, want
b. haven’t realized, want
c. don’t realize, wanted
d. didn’t realized, wanted
?I was on the highway when this car went past followed by a police car. They___at least 150 kilometers an hour.
a. should have been doing
b. must have been doing
c. could have done
d. would have done
12. Only because he was very busy ____ there.
A. he did not go b. he not went
c. did not he go
d. did he not go
Only when school was over could he go there.
13.Never before____ in greater need of modern public transport than it is today.
a. has this city been
b. this city has been
c. was this city
d. this city was
14. In the dark forests ___, some large enough to hold several towns
a. stand many lakes
b. lie many lakes
c. many lakes lie
d. many lakes stand
15. ___, Mary couldn’t get the door open.
a. Try as she might
b. As she might try
c. She might as try
d. Might she as try
16. Mary, all that you have to do is _____ the floor after class.,
a. helped clean
b. help cleaning
c. help clean
d. to help cleaning
17. Nobody but Mary knew the truth. ( wait )
The old man could do nothing but ___there, crying.
The old man had no choice but _____there, crying.
18. ----- Tell the workers that they can rest for an hour.
----- Does that _____ me, too?
a. do with
b. go for
c. come with
d. fit for
19. How long have you____ John?
a. marry
b. got married to
c. been married to
d. married
20. You can’t be _____ when you drive a car.
a. very careful
b. so careful
c. too careful
d. enough careful
?Go for a picnic this weekend, OK?
a. I couldn’t agree more
b. I’m afraid not
c. I believe not
d. I don’t think so
21. The classroom is big enough ____, but we’ll have to move if we have more students.
A. for the moment
b. on the moment
c. in a moment
d. for a moment
22 It’s not necessary to stop to refer to your dictionary when you come to an unknown word
which of the following is not suitable?
a. the moment
b. every time when
c. each time
d. immediately
23. ---- I didn’t mean ____ her
---- But talking like that means ____ her.
a. to hurt, to hurt
b. hurting, hurting
c. to hurt, hurting
d. hurting, to hurt
24. ____ to come and meet my family to tonight, will you?
a. be sure
b. to be sure
c. being sure
d. make sure
25. I’m sure David will be able to find the library----he has a pretty good ___ of direction.
a. idea
b. feeling
c. experience
d. sense
26. The town has changed a lot __ what it was before.
a. compared with
b. comparing to
c. compared for
d. comparing with
?On Christmas Day people walk about in the street___their best.
a. and wear
b. and put on
c. dressed in
d. to wear
?____ for the party, she was hard to be recognized even by her close friends.
a. Dressed in
b. Dressed up
c. Dressing in
d. Dressing up
?---- Who is the man you just talked with?
----The officer _____this project.
a. in charge of
b. in the charge of
c. take charge
d. take charge of
?There was a terrible noise____ the sudden burst of light.
a. followed
b. following
c. to be followed
d. being followed
?More and more people are signing up for Yoga classes nowadays, ___advantage of the health and relaxation benefits.
a. taking
b. taken
c. having taken
d. having been taken
?I was the first woman to travel alone at the North Pole.
27. The main use we____ paper is to write on it.
a. make
b. make of
c. are made of
d. make from
28. What way are you thinking of ___ rid of the flies?
a. to get
b. getting
c. being got
d. to be getting
29. It was only with the help of the local guide____.
a. was the mountain climber rescued
b. that the mountain climber was rescued
c. when the mountain climber was rescued
d. then the mountain climber was rescued
30. It was ___ she arrived there ___ she began to know something about the master.
a. until, when
b. until, that
c. not until, that
d. not when, that
31 The girl has to ____ a diet because he is told to act a pretty girl in the film.
a. take on
b. carry on
c. go on
d. have on
32. He ___ on other runners in the race and broke the finishing line first.
a. gained
b. beat
c. defeat
d. won
33. According to the weather report the weather will___ fine till this weekend.
a. continue
b. went on
c. kept on
d. last
34. Years later, efforts ___, she got the first place in the race.
a. paid off
b. was paid off
c. paid out
d. was paid out
35. On hearing the news of the accident in the coal mine, she____ pail.
a. got
b. changed
c. went
d. appeared
36. Generally speaking, the article is well written____ a few spelling errors.
a. besides
b. apart
c. except
d. except for
37. --- Is Jack coming by train?
---- He should, but he ____ not.
a. must
b. has
c. need
d. may
38. It is impolite_____ such rude words in public.
a. for you to say
b. for you saying
c. of you to say
d. of you saying
39. ___ our hope that the two sides will work towards peace.
a. This is
b. There is
c. That is D. It is
40. Scientists say it may be five or six years ____ it’s possible to test this medicine on human patients.
a. since
b. after
c. before
d. when
41. He is such a man who is always ___ fault with other people.
a. putting
b. seeking
c. finding
d. looking for
42. When he was there, he _____ go to that coffee shop at the corner after working everyday.
a. would
b. should
c. had better
d. might
45. The World Wide Web is sometimes jokingly called the word wide wait because it____ be very slow.
a. should
b. must
c. will
d. can
46. There____ no life at the moon.
a. is said to have
b. are said to have
c. is said to be
d. are said to be
47. I think you’ve got the point ____ a change is needed, otherwise you’ll fail.
a. when
b. that
c. where
d. which
48.-----You don’t look so well, Kate, what’s the matter with you?
----- Why? ______
a. Fine, thank you
b. I feel bad
c. I’m not myself
d. I’m quite myself
49. ---- Has Mary finished her task today?
---- ______
a. I have no idea
b. I believe not
c. It depends
d. up to her
50. ---- Have you seen her recently?
----Yes, ___that I met her in the cinema yesterday.
a. I happened
b. It happens
c. It so happened
d. I happen
51 There is a growing need ___ new housing in this area.
a. on
b. in
c. for
d. at
52. Don’t be so rude to your parents, show some____ for them.
a. honor
b. pity
c. respect
d. hope
53. Please give my ___to those who take great ___ in their work.
a. respect, pain
b. respects, pain
c. respect, pains
d. respects, pains
54. She was quite _____ to attend the banquet.
a. honor
b. honored
c. honorable
d. honoring
55. Don’t worry about the present situation in the world, ____ of people prefer peace to war.
a. the most
b. the great part
c. the majority
d. the number
56. ____ these students went to take this course this term.
a. A great many
b. A great many of
c. A member
d. A great deal of
57. Kathy ____ a lot of Spanish by playing with the native boys and girls.
a. picked up
b. took up
c. made up
d. turned up
58. I ____think he ____ succeed, will he ?
a. /, won’t
b. don’t, will
c. didn’t, would
d. thought, won’t
59. We have ___new methods to help disabled people.
a. made out
b. taken out
c. picked up
d. worked out
60. Excuse____ you, but I have an important message for you.
a. me to interrupt
b. my interrupt
c. me of interrupting
d. (my/me) interrupting
61. The discovery of the evidence led to____.
a. the thief having caught
b. catch the thief
c. the thief’s being caught
d. the thief to be caught
62. Tom did not take away the camera because it was just the same ____ he lost last week.
a. as
b. that
c. which
d. whose
63. I finally got the job because I had the advantages ____ others of knowing many knowledges.
a. of
b. over
c. to
d. above
64. These apples ____ .Help yourself to some, will you?
a. taste nice
b. taste nicely
c. are tasted nice
d. are tasted nicely
65. If I ____ go there, I should feel very glad.
a. can
b. could
c. should
d. may
66. How I wish every family____ a large house with a beautiful garden.
a. has
b. had
c. will have
d. had had
67. She did n’t come to the party ____ you had said.
a. because that
b. because of that
c. because what
d. because of what
68. This book tells ____ life story of John smith, who left ____ school and worked for a newspaper at the age of 16.
a. the ,the
b. a. the
c. the, /
d. a, /
69. You should understand the traffic rule by now, you’ve had it____ often enough.
a. explaining
b. explain
c. explain
d. explained
70. When he got off the bus, he found his wallet____, which one of the following is wrong?
a. lost
b. missing
c. missed
d. gone
71. We are going to set____ our work.
a. out起程，出发
b. about开始做，着手做
c. up开办，建立
d. off动身，出发
72. After getting along with him for more than a year, I found he____ to be selfish.
a. turns out
b. is proved himself
c. is turned out
d. turned out
73. ---- Not all body languages____ the same thing in different countries.
----Yes, it’s said that nodding the head____ ‘NO’ in some Asian countries.
a. meaning, means
b. mean, meaning
c. meaning, meaning
d. mean, means
74. If you can’t come tomorrow, we’ll ____have to hold the meeting next week.
a. yet
b. even
c. rather
d. just
75. To keep the fish caught in the river____, they put them into a tank.
a. lovely
b. alive
c. lively
d. live
alive adj. “活的”做表语, 补语(此句中alive 做补语)
e.g The fish is still alive.
live adj. “活的”只能做定语
e.g. live fish
此外live“现场直播的” e.g. a live football match 43. ---- I didn’t tell him the news yesterday.
---- But you ought ___.
a. to have
b. to
c./
d. not
44. I told John how to get the factory, but perhaps I____ for her.
a. had to write it out
b. must have written it out
c. should have written it out
d. ought to write it out
ought to 的否定式是ought not to
典型错题 1．（语文作业本）划线句中“占领”“控制”“封锁”三个词能互换使用吗？为什么？答案：不能。因为扬中等广大地区已解放，所以用“占领”一词；而江阴要塞还没攻下来，不过敌军不能任意活动，所以用“控制”一词；江阴已被我军控制，敌军想从长江逃走已无办法，所以用“封锁”一词。 错误原因：表述不清，词不达意。 改进措施：增加相关题型的练习次数。 2．（语文作业本）根据拼音写出汉字。Cuān（）升 答案：蹿 错误原因：与第一课所学的窜字混淆。 改进措施：区分两个字的不同读音和字义。 3．（语文作业本）第3课第一段中加点的“摸出”能否换成“拿出”或“取出”？为什么？ 答案：不能。“摸出”说明了老妇人十分珍惜这只蜡烛，把它藏得很深，只能用手摸索着把它拿出来。而“拿出”或“取出”则表达不出。 错误原因：知道不能替换，但不能正确的表述原因。 改进措施：引导学生从全文的角度把握个别字词的特殊含义。 4．选择恰当的词语填写在下列句子中的横线上。 推重推荐推让推崇 （1）这部著作受到学术界的________。（2）在荣誉面前大家互相________。 （3）他的高尚品德为人们所________。（4）这本书很好，应该向学生________。答案：推重推让推崇推荐
错误原因：推崇和推重两个词语混淆。 改进措施：先看词义：推崇：尊崇，十分推重。推重：对某人的思想、行为、成就等给予很高的评价，表示十分重视。据此可以看出，推重侧重于对某人一个或几个方面的重视，而推崇则倾向于对整个人的认可；即便指向于相同的一个侧面，推崇的语气明显强于推重。也可以说，推重是有所保留的认可，而推崇是毫无保留的认可。 5．课文中表现桃花源中人安居乐业的句子是___________________________。 答案：其中往来种作，男女衣着，悉如外人，黄发垂髫，并怡然自乐。 错误原因：将描写桃源景色的句子也写入其中。 改进措施：学会审题，把握问题中的关键字词。 6．用现代汉语写出下列句子的意思。 公揣囊中已空，命同来家中取钱。 答案：汤公摸了摸钱包，没有钱，就让买菜翁和自己一起去拿钱。 错误原因：将同来理解成同来的人。 改进措施：根据文意正确把握被省略的人称词，相关练习可参考课后练习三。 7．凄风。苦雨。天昏。地暗。 （这里连用四个句号，起到了什么表达效果？这里仅仅是在描写天气吗？） 答案：这里不仅是描写天气，而且在渲染气氛，“天地亦与人同哀”。连用四个句号，成为四个短句，使每个字都最大限度地发挥出表意功能。读者的阅读速度自然放慢，读两个字，停顿一下，想像一个画面。这样开头让读者一上来就感受到无限悲哀的氛围。 错误原因：理解不到位。 改进措施：理解环境描写在文章中的不同作用。
八年级英语下册错题集 Standardization of sany group #QS8QHH-HHGX8Q8-GNHHJ8-HHMHGN#
英语期末总复习 1．___times do you play sports every week——Twice A．How often B．How much C．How many D．How long 2．Getting up early，doing exercise，eating a lot of vegetables are all good___。 A．habits B．ways C．sports D．things 3．My eating habits___yours． A．are the same as B．is the same as C．is same as D．are the same for 4．He often gets to school late___be lives near the school．A．because B．as C．although D．but 5．Jack often helps his father ___in the garden． 6．——What do you want to be ——A basketball my parent___me to be a doctor A．help B．want C．make D．have 7．I didn’t watch the basketball game last ’s the r____of it 8．——Is your brother in GuangZhou now ——Yes,he will be back in ___ten days A．other B．others C．the other D．another 9．His father left without____ word A．say B．to say C．said D．saying 10．___them home A．Take B．Bring C．To take D．To bring 11．The old man is___good health A．in B．at C．of D．with 12．Come to ask me if you have___qestions A．some B．any C．much D．a lot 13．We should keep our classroom____ A．cleaned B．clean C．cleaning D．to clean 14．He must___his sister with her math A．try help B．trying to help C．trys to help D．try to help 15．．Are you ___from America ——No,none of us A．both B．all C．any D．either 16．This kind of cake looks____and smells____ A．good,well B．well,good C．good,good D．well,well 17．——Did you remember to tell him about my birthday ——Sorry,I f____ it 18．What are they doing for vacationThey are just r____books at home 19．The hospital is____far from the station A．quiet B．quite C．much D．more 20．He is too young．He can____look after himself A．hardly B．hardly ever C．never D．ever 21．Shooting is a healthy sport,____
第十六章《二次根式》易错题 一、选择题 1. 当a>0, b >0时，n是正整数，计算'- n的值是( ) A. (b - a)二、丄」：. (a n b3—a n+1b2) i C. (b3- ab2)'二D. (a n b3+a n+1 b2) i 错答：D 考点：二次根式的性质与化简。 分析：把被开方数分为指数为偶次方的因式的积，再开平方，合并被开方数相同的二次根式. 解答：解：原式=-, =a n b3 -i - a n+1 b2 i =(a n b3- a n+1 b2) -i. 故选B. 点评：本题考查的是二次根式的化简?最简二次根式的条件：被开方数中不含开得尽方的因式或因数. 点评：解答此题，要弄清二次根式的性质：_7=|a|，分类讨论的思想. 2. 当X V- 1 时，|x-q；：」：：；'-2| - 2|x - 1|的值为( ) A. 2 B . 4x - 6 C . 4 - 4x D . 4x+4 错答：C 考点：二次根式的性质与化简。 分析：根据x V - 1，可知2 - x > 0 , x - 1 V 0，利用开平方和绝对值的性质计算. 解答：解：T x V - 1 ：2 - x> 0, x - 1 V 0 ?|x -i ?--2| - 2|x - 1| =|x - (2 - x) - 2| - 2 (1 - x) =|2 (x - 2) |-2 (1 - x) =-2 (x - 2) - 2 (1 - x)
故选A. 点评：本题主要考查二次根式的化简方法与运用： a > 0时,Ha ; a v 0时，身匕土= - a; a=0时，：：；...二 =0 ； 解决此类题目的关键是熟练掌握二次根式、绝对值等考点的运算. 3?化简|2a+3 [1+ ：一「「I 丁_(a v - 4)的结果是( ) A. 一-―-3a B. 3a - C . a+ 山D. - - 3a 2 2 2 2 错答：B 考点：二次根式的性质与化简；绝对值。 分析：本题应先讨论绝对值内的数的正负性再去绝对值，而根号内的数可先化简、配方，最后再开根号，将两式相加即可 得出结论. 解答：解：??? a v - 4, ?'2a v - 8, a - 4 v 0 , -2a+3 ―-v —8+3 —v 0 =-2a - 3 +4 - a= - 3a . 2 2 故选D . 点评：本题考查的是二次根式的化简和绝对值的化简，解此类题目时要充分考虑数的取值范围，再去绝对值，否则容易计算错误. 4 .当x v 2y时，化简叮一得( ) A. x (x - 2y) B . -厂C . ( x- 2y) ■■- D . (2y - x) ” z 错答：C 考点：二次根式的性质与化简。
八年级下易错题集（一） 一．选择题（共16小题） 1．代数式中，分式的个数是（） 2．已知对任意实数x，式子都有意义，则实数m的取值范围是（） 3．（龙岩模拟）当式子的值为零时，x等于（） 4．若分式的值为正，则x的取值范围是（） ＞﹣﹣且5．分式中的x，y同时扩大3倍，则分式的值（） 是原来的6．下面各分式：，其中最简分式有（）个． ． 分钟分钟C 分钟 D． 分钟 8．计算的结果为（） C D． 9．计算的结果是（） D．10．（鸡西）若关于x的分式方程无解，则m的值为（） 11．（扬州）若方程=1有增根，则它的增根是（）
．C D． 13．（金华）小明在一直道上骑自行车，经过起步、加速、匀速、减速之后停车．设小明骑车的时间为t（秒），骑．C D． ﹣0.5x﹣1中，一次函数有（） 14．下列函数：①y=﹣8x、②、③y=8、④y=﹣8x2+6、⑤y= ） 16．已知点（﹣4，y1），（2，y2）都在直线y=﹣x+2上，则y1，y2大小关系是（ 18．（清远）计算：（π﹣3）0+2﹣1=_________． 19．等腰三角形的周长是16，写出底边长y与一腰长x的函数关系式____，自变量x的取值范围是________．20．（贵州模拟）在函数y=中，自变量的取值范围是_________． 21．已知函数y=（k﹣1）x+k2﹣1，当k_________时，它是一次函数，当k=_______时，它是正比例函数．22．（包头）若一次函数y=ax+1﹣a中，y随x的增大而增大，且它的图象与y轴交于正半轴，则|a﹣1|+= _________． 23．（襄阳）若一次函数y=2（1﹣k）x+k﹣1的图象不过第一象限，则k的取值范围是_________． 24．将直线y=2x沿x轴的正方向平移1个长度单位，得到直线_________． 25．直角坐标系中，直线y=2x+3关于原点对称的解析式为_________． 三．解答题（共5小题） 26．通分：，．
1、Every year many c came to the Himalayas. 2、She r her own life to help a disabled woman. 3、The football match has to be put off next week because of the s . 4、Did you know that China is oneof （old）countries in the world？ 5、Qomolangma is higher than any other （mountain）in the world. 6、There are many (difficult) in the world.It’s a lot bigger than the population of the US. 7、China is larger than in Aria. A、any countries B、any country C、any other country D、all the countries 8、You speak English as as Tom . A、good；does B、good；is C、well ；does D、well；is 9、The math problem is to work out.A、much difficult B、more difficult C、difficult enough D、too difficult 10、The Pacific Ocean is 155.6 million square kilometers in 11、It’s not so as yesterday，so there are people sitting in the square。A、colder；fewer B、warmer；fewer C、cold；more D、warm；more 12、Which of the two girls is Jack’s sister? A、The tallest B、T aller one C、The taller one D、Taller 13、Usually Xiao Li spends time doing homework than Xiao Chen does . A、little B、less C、few D、fewer 14、He has a lot of work every day. A、do B、to do C、doing D、done 15、He always lies in bed and helps his wife to do anything A、ever B、always C、never D、usually
八下·名校教辅易错题Unit 8_试题 一、单项选择 1. The sailors saw the ______ in the distance. A. ground B. floor C. soil D. land 2. The soldiers ______ the ship successfully on a small ______ with water around. A. landed; land B. landed; island C. dropped; island D. dropped; land 3. —When will the snow ______? —Maybe tomorrow. A. leave alone B. leave out C. leave behind D. leave off 4. Mom ______, so I can’t go with her. A. left me behind C. will leave me behind 5.—Tina’s mother ______ to Lond on last month. —He ______ there three times. A. went, had gone C. went, has been B. leaves behind me D. has left me behind B. has gone, has been D. has been, had gone 6. —______ do you like the talent show? —I think it’s ______. A. How; great success C. What; great success B. What; a great success D. How; a great success 7. —Mike is the fattest in his family. —Yes. He is fatter than ______ in his family. A. anyone C. other students B. anyone else D. any other students 8. —I plan to ______ a few lines of the article because it is too long. —Then it will be better. 9. A. cut out —Where’s Peter? B. give out C. look out D. find out —He ______ Nanning for three days. A. is going B. have been to C. has gone to D. has been in 10.—May I speak to John? —Sorry, he ______ Japan. But he ______ in two days. A. has been to, will come back C. has been in, will come back B. has gone to, won’t come back D. has gone to, will be back 11.—What ______ the number of the students in your school? —About two thousand. A number of them ______ from the countryside. A. is, are B. is, is C. are, is D. are, are 12. I never listen to English songs ______ the radio. I ______ listening to MP5. A. in, used to C. in, am used B. on, used to D. on, am used to
八年级上科学好题、易错题精选推荐（二） 1．某研究性学习课题小组，在教师的指导下，完成了“水的体积随温度变化”的研究，得到如右图的图线。根据这个图线，说明水的温度从8℃降低至2℃的过程中，等体积的水的质量（ c ） A、先变小后变大 B、保持不变 C、先变大后变小 D、一直变大 2．下列关于水的性质的叙述中，属于化学性质的是（ D ） A、降温到0℃，水结成冰 B、加热到100℃，水变成水蒸气 C、水蒸气遇冷，凝结成水 D、给水通电，生成氢气和氧气 2．对密度定义式ρ=m/V的下列几种理解中，正确的是（D ） A、密度与物体的质量成正比 B、密度与物体质量成正比，与其体积成反比 C、密度与物体的体积成反比 D、密度是物质本身的一种特性与物体的质量和体积无关 4．人们常说“铁比木头重”，这句话的实际含义是（C ）A、铁的质量比大头大 B、铁的重力为比木头大 C、铁的密度比木头大 D、木头的体积比铁大 5．人的密度跟水的密度差不多，请估算一个中学生的体积最接近下列哪一个值（ B ） A、50m3 B、50dm3 C、50cm3 D、50mm3 6．古人称黄河是“一石水，六斗泥”，经测定黄河水每立方米的平均含沙量约为35kg，合每立方厘米含沙量约为 （ D ）
A、1 g B、1 g C、3.5×10-1g D、3.5×10-2g 7．一只最多能装下500克水的瓶子，也能装下500克的（ D ）物质柴油酒精汽油浓硫酸密度（千克/米3）0.85×1030.80×1030.71×103 1.84×103 A、柴油 B、酒精 C、汽油 D、浓硫酸 8．天平两端各放一块铝块和铁块，天平平衡，则铝块和铁块的质量之比是 1:1 ，密度之比是 27:79 ，体积之比是 79:27 。 9．有四个容量都为500毫升的瓶子，分别装满海水、纯水、酒精和汽油，那么装的质量最多的是（ρ海水＞ρ纯水＞ρ酒精＞ρ汽油） （ A ） A、海水 B、纯水 C、酒精 D、汽油10．一支正在燃烧的蜡烛，它的（ A ） A、质量不断减少，密度不变 B、质量不断减少，密度也减小 C、质量不变，密度也不变 D、质量不变，密度减小 11．医院里有一人氧气瓶，它的容积是10dm3，里面装有密度为2.5kg/m3的氧气，某次抢救病人里去了5g氧气，则瓶内剩余氧气的密度为（ B ） A、1 kg/m3 B、2 kg/m3 C、2.2 kg/m3 D、2.5 kg/m3 12．关于压力，下列说法正确的是（ C ） A、压在物体表面上的力叫压力 B、压力的大小一定等于物体的重力 C、压力的方向一定垂直于受压物体表面 D、压力的方向一定垂直于水平地面 13．书包带宽5cm，与肩部接触部分长度为35cm，总质量为7kg，小红选择这种书包的理由及她肩部所受压强大小正确的是（ A ）书包带有两条 A、减小压强；2×103Pa B、增大压强；2×102Pa C、减小压强；2×104Pa D、减小压力；2.45Pa
八年级下册数学易错题 一、选择题： 1、如果把分式 y x xy +中的x 和y 都扩大2倍，则分式的值（ ） A 、扩大4倍 B 、扩大2倍 C 、不变 D 、缩小2倍 2、下面函数：①y=-3x ；②y=-x 8；③y=4x-5；④y=5x -1 ；⑤xy=81。其中反比例函数的 个数是（ ） A 、2 B 、3 C 、4 D 、5 3、下列关系中的两个量成反比例关系的是（ ） A 、三角形一边的长与这边上的高； B 、三角形的面积与一边上的高； C 、三角形的面积一定时，一边的长与这边上的高； D 、三角形一边的长不变时，它的面积与这边上的高。 4、若反比例函数y=x k 的图象经过点（-1，2），则这个函数的图象一定经过点（ ） A 、（-2，-1） B 、（-21，2） C 、（2，-1） D 、（2 1，2） 5、当x=-2008时，分式 2 -11x x +的值为（ ） A 、2008 B 、-2008 C 、2008 1 D 、20091 6、下列各式正确的是（ ） A 、c b a c b a --= B 、c b a c a b ---= C 、 c b a c --b a -+=+）（ D 、c b a c b a ----= 7、若分式方程 323 4=++x m mx 的解为x=1，则m 的值为（ ） A 、1 B 、2 C 、3 D 、4
8、若分式11 -2+x x 的值为0，则x 的值为（ ） A 、1 B 、-1 C 、±1 D 、0 9、如果分式 ) (3)(b a b a a ++的值是零，那么ab 满足的条件是（ ） A 、a=-b B 、a≠-b C 、a=0 D 、a=0且b≠0 10、计算x 2y 3÷(xy)-2的结果为（ ） A 、xy B 、x C 、x 4y 5 D 、y 11、已知关于x 的函数y=k(x-1)和y=-x k （k≠0)，它们在同一坐标系中的图象大致是 ( ) o x y A o x y B o x y C o x y D 12、如果把分式 2 24y x xy +中的x 和y 都扩大2倍，则分式的值（ ） A 、不变 B 、扩大2倍 C 、扩大4倍 D 、缩小2倍 13、美是一种感觉，当人体下半身与身高的比值越接近0.618时，越给人一种美感。如某女士身高为165cm ，下半身长x 与身高l 的比值是0.6，为尽可能达到好的效果，她应穿的高跟鞋的高度大约为（ ） A 、4cm B 、6cm C 、8cm D 、10cm 14、一条对角线长17cm ，一边长为15cm 的矩形的周长是（ ） A 、40cm B 、42cm C 、44cm D 、46cm 15、以直角三角形三边为直径的半圆面积从大到小依次记为S 、S 、S ，则S 、S 、
八年级下册英语易错题 及答案 文档编制序号：[KK8UY-LL9IO69-TTO6M3-MTOL89-FTT688]
八年级下册英语易错题答案 一、选择题 1、Did you go to Zhou Jielun’s concert last night? Yes . The concert was wonderful and it A a beautiful song. （end wiht …以……结尾，且本题应使用一般过去时） A.ended with B. ends with C. ends of D. ended of 2、When we feel disappointed, Mr. Ye can always B . Yeah, he’s really cool! A. cheers us up B. cheer us up C. cheers up us D. cheer up us （cheer up 使振作起来，代词作宾语时，置于cheer up中间，且情态动词can后接动词原形） 3、Kangkang failed B last math exam because he was careless. A. pass B. to pass C. finish D. to finish (fail to do sth. 没能做某事；pass the exam 考试及格） 4、The girl is still crying A her father gives her lots of toys and chocolate. A. even though （即使） B. because C. but also D. if 5、Is that your best friend Sally？No, it B be her. She flew to Hong Kong yesterday.
勤冠教育错题集 Ⅰ.Choose the best answer (选择最恰当的答案) 1.What’s your view ____ keeping pets？ A.on B. for C. of D. to 2.The more English news paper you read，the____ you will do in your English. A.better B. good C. well D. best 3.Could you tell me ____? A.when did we have an English oral test B.when we’ll have an English oral test C.how did we have an English oral test D.what we were going to do the next day 4.— Would you like some more coffee？ —Yes，please，but only____. A.few B. a few C. little D. a little 5.Can you write letters ____ English？ A.With B. by C. in D. for 6.If you don’t know ____he said，you only nod and laugh. A.how B. why C. what D. when 7.Li Hui，____ monitor of our class，is writing letter now. A.a B. an C. the D. / 8.The reporters ____ to proofread themselves.
初二数学下册易错题集 ?(P18)如图，为了说明示意图中的平安大街与长安街市互相平行 的，在地图上量的角1等于90度，你能通过度量图中已标出的其他的角来验证这个结论吗？说出你的理由。 ?（p135）当x满足什么条件的时候，3x-1表示正整数。 ?（p135）某商店以每辆250元的进价购入200辆自行车，并以每 辆275元的价格销售，两个月后自行车的销售款已经超过这批自行车的进货款，这时至少已经售出多少辆自行车。
?（p134）根据下列条件求正整数x ?（p134）解下列不等式，并把他们的解集在数轴上表示出来。 ?（p129）长跑比赛中，张华跑在前面，在离终点100m时他以每 秒4m的速度向终点冲刺，在他身后10m的李明需要以多块的速度同时开始冲刺，才能够在张华之前到达终点。
?（p129）一部电梯最大负荷为1000Kg，有12人共携带40kg的 东西乘电梯，他们的平均体重x应满足什么条件。 ?（p128）利用不等式的性质解下列不等式，并在数轴上表示解集。 ?（p119）甲地到乙地全称是3.3千米，一段上坡，一段下坡，一 段平路，如果保持上坡每小时行3千米，平路每小时行4千米，下坡每小时行5千米，那么从甲地到乙地需要行驶51分钟，从乙地到甲地需要行驶53.4分钟，球从甲地到乙地时上坡，平路，下坡的路程各是多少。
?（p118）解方程： ?（p108）从甲地到乙地的路有一段上坡与一段平路，如果保持上 坡每小时走3千米，平路每小时走4千米，下坡每小时走5千米，那么从甲地到乙地需要54分钟，从乙地到甲地需要42分钟，甲地到乙地全程是多少。 ?（p108）有大小两种货车，2辆大车与3辆小车一次可以运货 15.5吨，5两大车与6辆小车一次可以运货35吨，3；辆大车与5 辆小车一次可以运货多少吨。
英语期末总复习 1．___times do you play sports every week？——Twice A．How often B．How much C．How many D．How long 2．Getting up early，doing exercise，eating a lot of vegetables are all good___。A．habits B．ways C．sports D．things 3．My eating habits___yours． A．are the same as B．is the same as C．is same as D．are the same for 4．He often gets to school late___be lives near the school． A．because B．as C．although D．but 5．Jack often helps his father ___in the garden． 6．——What do you want to be? ——A basketball player.But my parent___me to be a doctor A．help B．want C．make D．have 7．I didn’t watch the basketball game last night.What’s the r____of it? 8．——Is your brother in GuangZhou now? ——Yes,he will be back in ___ten days A．other B．others C．the other D．another 9．His father left without____ word A．say B．to say C．said D．saying 10．___them home A．Take B．Bring C．To take D．To bring 11．The old man is___good health A．in B．at C．of D．with 12．Come to ask me if you have___qestions A．some B．any C．much D．a lot 13．We should keep our classroom____ A．cleaned B．clean C．cleaning D．to clean 14．He must___his sister with her math A．try help B．trying to help C．trys to help D．try to help 15．．Are you ___from America? ——No,none of us A．both B．all C．any D．either 16．This kind of cake looks____and smells____ A．good,well B．well,good C．good,good D．well,well 17．——Did you remember to tell him about my birthday? ——Sorry,I f____ it 18．What are they doing for vacation?They are just r____books at home 19．The hospital is____far from the station A．quiet B．quite C．much D．more 20．He is too young．He can____look after himself A．hardly B．hardly ever C．never D．ever 21．Shooting is a healthy sport,____? A．ok B．all right C．is it D．right 22．I’m hungry.____will supper be ready? A．How long B．How often C．How much D．How soon 23．He is going caming____6:30____the moring of August 22nd
精品文档 第十六章《二次根式》易错题 一、选择题 是正整数，计算的值是（n ）a＞0，b＞0时，1．当）+ab（a ﹣b﹣aab）b）D．C．（b（A．b﹣a（）B．ab22n+1233nn3n+1 D错答：考点：二次根式的性质与化简。 分析：把被开方数分为指数为偶次方的因式的积，再开平方，合并被开方数相同的二次根 式． ﹣解答：解：原式=a=abb﹣23n+1n）b﹣aa=（b．2nn+13故选B． 点评：本题考查的是二次根式的化简．最简二次根式的条件：被开方数中不含开得尽方的因式或因数． 点评：解答此题，要弄清二次根式的性质：=|a|，分类讨论的思想． ﹣2|﹣2|x﹣|x1|﹣的值为（）12．当x＜﹣时，C．2 A．B．4x﹣6 4﹣4x D．4x+4 C错答：考点：二次根式的性质与化简。 分析：根据x＜﹣1，可知2﹣x＞0，x﹣1＜0，利用开平方和绝对值的性质计算． 解答：解：∵x＜﹣1 ∴2﹣x＞0，x﹣1＜0 ﹣﹣2|﹣2|x﹣1| ∴|x=|x﹣（2﹣x）﹣2|﹣2（1﹣x） =|2（x﹣2）|﹣2（1﹣x） =﹣2（x﹣2）﹣2（1﹣x）
精品文档． 精品文档 =2． 故选A． 时，=0a=0；时，=﹣a点评：本题主要考查二次根式的化简方法与运用：a＞0；时，=a；a＜0解决此类题目的关键是熟练掌握二次根式、绝对值等考点的运算． |+（a＜﹣4）的结果是（3．化简）|2a+3 ．﹣．a+D3a AB．﹣3a ．3a ﹣C B错答：考点：二次根式的性质与化简；绝对值。 分析：本题应先讨论绝对值内的数的正负性再去绝对值，而根号内的数可先化简、配方，最后再开根号，将两式相加即可得出结论． 解答：解：∵a＜﹣4， ∴2a＜﹣8，a﹣4＜0， 8+3＜＜﹣0 ∴2a+3|+原式=|2a+3=|2a+3|+a=﹣ 3a．3+4﹣=﹣2a﹣故选D． 点评：本题考查的是二次根式的化简和绝对值的化简，解此类题目时要充分考虑数的取值范围，再去绝对值，否则容易计算错误． 时，化简得（）．当4x＜2y）x2y﹣．x﹣2y）D（（C 2yxxA ．（﹣）B．． C错答：考点：二次根式的性质与化简。 分析：本题可先将根号内的分式的分子分解因式，再根据x与y的大小关系去绝对值． 精品文档． 精品文档 2y| =解答：解：原式=|x=﹣∵x＜2y
2009—2010学年度第一学期期终检测 八年级数学试题（120分钟 120分） 一、选择题（把正确答案的代号填在下面对应的表格中，每小题3分，共30分） 3、下列说法中，①一组数据的中位数只有一个②一组数据的中位数可能是这组数据中的数，也可能不是这组数据中的数 ③一组数据的众数可能有多个 ④一组数据的众数是这组数据中出现次数最多的数据的次数⑤一组数据的众数一定是这组数据中的数 正确说法的个数有（ ） A 、1个 B 、2个 C 、3个 D 、4个 5、下列说法正确的有（ ） （1）数轴上的点不是表示有理数，就是表示无理数；（2）实数a 的倒数是a 1 ；（3）带根号的数都是无理数；（4）两个绝对值不相等的无理数，其和、差、积、商仍是无理数。 Ａ、1个 Ｂ、2个 Ｃ、3个 Ｄ、4个 内容补充 一个数的平方=它本身这个数0，1 一个数的平方根=它本身这个数是0，1 一个数的算术平方根=它本身这个数是0， 一个数的立方等于它本身，这个数是－1，0，1 一个数的立方根=它本身这个数是－1，0，1
6、一个自然数的算术平方根为m ，则与这个自然数相邻的下一个自然数是（ ） Ａ、1+m Ｂ、 12+m Ｃ、12+m Ｄ、1+m 分析：此题注意审题 二、填空题 11、某市对全市3万名初中学生的视力进行了一次抽样调查，得到如图所示的统计图。在这次调查中，所选取样本的容量是 ；如果视力在4.9到5.1之间（含4.9与5.1）为正常，那么全市大约有 名初中生视力是正常的。 12、设10的整数部分为a ，小数部分为b ，则代数式b （10+a ）的值等于 。 根号9<根号10<根号16，所以3<根号10<4，所以，a=3 b=【根号10-3】 所以，b （10+a ）=【根号10-3】【根号10+3】 所以利用因式分解的结果为1 13、比较大小：-36.0 -1 /2 15、如图所示，AD ＝4，CD ＝3，∠ADC ＝90°，AB ＝13，BC ＝12，该图形的面积等于 . 16、已知x 满足（x-1）3=-27 8,则x= ；
一、选择题 1．下列计算正确的是（ ） A ．336+= B ．3323+= C ．336?= D ．3333+= 2．下列计算正确的是（ ） A ．2×3=6 B ．2+3=5 C ．8=42 D ．4﹣2=2 3．下列计算正确的是（ ） A ．2+3=5 B ．8=42 C ．32﹣2=3 D ．23?=6 4．已知52a =+，52b =-，则227a b ++的值为（ ） A ．4 B ．5 C ．6 D ．7 5．已知：x ＝3+1，y ＝3﹣1，求x 2﹣y 2的值（ ） A ．1 B ．2 C ．3 D ．43 6．设a 为3535+--的小数部分，b 为633633+--的小数部分，则 21 b a -的值为（ ） A ．621+- B ．621-+ C ．621-- D ．621++ 7．下列计算正确的是（ ） A ．531883+= B ．() 3 22326a b a b -=- C ．2 2 2 ()a b a b -=- D ．2422 a a b a a b a -+?=-++ 8．如图，是按一定规律排成的三角形数阵，按图中数阵的排列规律，第9行从左至右第5个数是（ ） 1232567 22 310 A ．210 B ．41 C ．52 D ．51 9．下列计算不正确的是 （ ） A ．35525-= B ．236?= C 77 42 = D 363693=+== 10．如果2a a 2a 1-+，那么a 的取值范围是（ ） A ．a 0= B ．a 1= C ．a 1≤ D ．a=0a=1或
二、填空题 11．能力拓展： 1A = 2A =；3:A =； 4A =________． …n A ：________． ()1请观察1A ，2A ，3A 的规律，按照规律完成填空． ()2比较大小1A 和2A ()3 - 12．设a ﹣b=2b ﹣c=2a 2+b 2+c 2﹣ab ﹣ac ﹣bc=_____． 13．观察下列等式： 第1个等式：a 11 =， 第2个等式：a 2 =， 第3个等式：a 3 ， 第4个等式：a 42 =， … 按上述规律,回答以下问题： (1)请写出第n 个等式：a n =__________. (2)a 1+a 2+a 3+…+a n =_________ 14．为了简洁、明确的表示一个正数的算术平方根，许多数学家进行了探索，期间经历了 400余年，直至1637年法国数学家笛卡儿在他的《几何学》中开始使用”表示算数平 方根．我国使用根号是由李善兰（1811-1882年）译西方数学书时引用的，她在《代数备 旨》中把图1所示题目翻译为：?=则图2所示题目（字母代表正数）翻译为_____________，计算结果为_______________.
八年级下册英语易错题 一、选择题 1、Did you go to Zhou Jielun’s concert last night? Yes . The concert was wonderful and it a beautiful song. A.ended with B. ends with C. ends of D. ended of 2、When we feel disappointed, Mr. Ye can always . Yeah, he’s really cool! A. cheers us up B. cheer us up C. cheers up us D. cheer up us 3、Kangkang failed last math exam because he was careless. A. pass B. to pass C. finish D. to finish 4、The girl is still crying her father gives her lots of toys and chocolate. A. even though B. because C. but also D. if 5、Is that your best friend Sally？No, it be her. She flew to Hong Kong yesterday. A. mustn’t B. can’t C. may not D. must 6、I will never forget the accident it happened five years ago. A. only if B. only when C. even though 7、People there have heart trouble and other kinds of health problems this month. A. On B. At C.In D. During 8、How many people are there in the school? .They all went to the theater. A、Nobody B、No one C、None 9、It rang and rang. Her mother heard the . “Why don’t you answer the telephone, Sue?” she asked. A、voice B、cry C、sound 10、What is happiness? ( ) A、Your parents care for your life and health B、Happiness is for everyone C、The rich have cars but they walk in their free time. 11、Why did the teacher John to the teacher’s office after class? Because he our teacher angry in class. A、make, got B、let, made C、get, made D、got, make 12、We can’t make before we think it over carefully. A、decide B、decision C、a decision D、deciding 13、You can’t do all things than anyone else. A、well B、good C、better D、best 14、Helen’s mother is Helen’s study because she missed some classes. A、bored with B、pleased with C、worried about 15、Then he went to sleep without . A、something worried B、anything worried C、worried anything 16、Our hotel the sea. You can enjoy the beautiful scenery here. A、faces B、face to C、face D、faces toward 17、I noticed Liao Chen a book when I passed by the library. A、read B、reading C、watch D、watching