易错选择题精选(1)

2012年备战中考易错选择题精选（来自学生错题）

1. Some students were afraid ____in class because they thought their classmates might laugh at

them.

A of speak

B to speak

C speak

D to speaking

2. I found ____ difficult to learn English grammar.

A it

B that

C it is

D that is

3. He decided ____school late again.

A to come

B don’t come

C come not to

D not to come to

4. She needs a partner ______

A to practice English with

B practicing English

C to practicing English with

D practice English with

5.Stop chatting .I have ____ to tell you.

A anything important

B something important

C important anything

D important something

6. It’s good that _____have their own ideas about life as well as about being co ol.

A the young

B youth

C the young man

D young

7.My grandfather ___ me stories when I was young .

A was used to tell

B is used to telling

C used to tell

D used to telling

8. When I was a student , I was used to _____ at six .

A get up

B getting up

C gets up

D geting up

9. It is ____ of a problem to be poor than to be dishonest.

A more

B little

C less

D much

10. My brother is ___to carry the heavy box by himself .

A old enough

B enough old

C enough strong

D strong enough

11. I must get my homework ____,

A done

B does

C do

D did

12. People are not allowed ____ in the cinema , but they will allow ____in the rest room.

A to smoke, smoke

B smoking , to smoke

C to smoke , smoking

D smoking ,smoke

13.The music sounds _____

A well

B nicely

C good

D beautifully

14. _____ to improve our English?

A What do you think we should do

B Do you think what do we should

C What do you think should we

D Do you think what should we do

15. His bike is broken .It needs _____soon.

A be repair

B to mend

C to be repaired

D being mend

16. Three more men ____to do the work every day .

A were needed

B need

C are needing

D are needed

17. He is against ______ computer games.

A playing

B plays

C play

D to play

18.He was too hungry , so he ate ____in the evening.

A plenty of

B a lot of

C many

D a lot

19.I don’t know _____.

A what to do it

B how to do

C what to do

D to do what

20.I don’t know if I _____anyone at the party this evening.

If I _____anyone , I will get nervous.

A will know, won’t know

B will know ,don’t know

B know, won’t know D know , don’t know

21.Tom is afraid to speak in ______public.

A the

B a

C an

D /

22. The professor always has good solutions_____others’ problems.

A of

B to

C with

D about

23. If you take my ______, please don’t tell _____about it.

A advice ,any

B advices, some

C advices, someone

D advice , anyone

24.They are hardly ever tired ,______they?

A are

B aren’t

C will

D won’t

25.I’ll have a test ______ writing next week.

A at

B of

C on

D in

26.If you have any ideas ______, please return them to him.

A whose gloves are these

B whose gloves is this

C whose gloves these are

D whose gloves this is

27._____ has been found out ____ oil food is bad for our health

A That , that

B That ,what

C It , what

D It , that

28 I prefer music that_____ great lyrics.

A have

B has

C there is

D there are

29. I only eat food that tastes _______.

A well

B nicely Cgood D deliciously

30 The Greeen family would like to_______for about three weeks.

A leave home

B go out

C come to China

D be away

31. I hope ____have a happy year in our class.

A you to

B or you

C to you

D you

32. The two men walked ______ the forest and got to a small house.

A across

B through

C crossing

D over

33.The girl _____ her mother . I know her mother likes reading,too.

A takes after

B looks after

C similar

D takes care

34. Don’t put off ____ to see the doctor when you are ill.

A go

B to go

C going

D gone

35.He spent every Sunday morning _____ in an old p eople’s home.

A to work

B working

C worked

D works

36.He ___ to read , so he always puts his ___ to good use by working in the after- school care center at his elementary school.

A love ,loves

B loves ,love

C loving,loving

D loves ,loves

37.The sudden rain made ______for the singers to put on performces

A that possible

B that impossible

C it possible

D it impossible

38.____ ill, I can’t go to school today.

A Because of

B As

C Being

D With

39. This watch ______China .

A was made in

B was made by

C was made from

D was made of

40. ____ our football team won .

A By the end

B In the end

C At the end of

D Final

41.The headmaster announced that there would ____ an English speech contest next month.

A have

B has

C to have

D be

42. Did you go to the movie with Lucy? No , I _____

A didn’t invite

B wasn’t invited

C hadn’t invited

D wasn’t inviting

43. –Excuse me, could you tell me ______? ---Of course

A when had the train left the station

B where is the nearest the hospital

C if it will be windy tomorrow

D how much did the car cost

44. Must I do my homework ? --- No you _____.

A mustn’t

B can’t

C needn’t

D won’t

45. ---I don’t know ______next. – You could ask your teacher for help.

A how to do

B what to do

C . why to do

D when to do

46. Tom asked his friend ______.

A not to be so angry

B that knowledge is power.

C when did he come back

D where was he born

47.I find ___ a little difficult to remember the English words.

A that

B it

C this

D them

48 What are you nervous_____, Jenny.?

A in

B at

C on

D about

49.We should ____ that.

A thinking of

B thought of

C have thought of

D have thinking of

50. Don’t get _____when you listen to the old.

A bored

B boring

C tiring

D excited

51. I don’t like the people who always keep me ______.

A wait

B waiting

C to wait

D waited

52.—Do you like loud music ? --- I am often ______ want to leave by it.

A made

B made to

C making

D making to

53.The pen doesn’t work .I need to buy a new one to write_____

A with Bin C on D /

54.—You want to improve your spoken English. Why ____an English languageclub?

----Good idea.

A don’t join

B not join

C not to join

D not you join

55.If you have some trouble ____the railway station ,please ask the police for help .

A finding

B finding out

C looking for Ddiscovering

56.—I don’t know ______I should do with so many eggs. –You can sell them.

A how

B why

C what

D when

57.There used _____an old church here, but now we can see a park here.

A to have

B was

C to be

D had

58.Everyone is _____to find that the little boy can play the piano so well. He is only 5 years old.

A interested

B surprised

C excited

D frustrated

59. My calculator is ________more expensive than yours.

A fairly

B very

C quite

D much

60.I’d like to go there by bike ______by car.

A. not B instead C than D rather than

61. At last , Mr Li ______a good idea , everyone felt happy.

A thought

B thought of

C came up with

D thought about

62.---Why hasn’t Tom come here? ----He ____ill at home.

A maybe

B may be

C was

D can’t be

63.-- ____does the book ____? ----Linda . She bought it this morning.

A Whose , be

B How much, cost

C Whose , belong to

D Who , belong to

64. The girl is too shy , she ____some time with her friends.

A doesn’t need spending

B needn’t spend

C needs to spend

D needed spending

65. I learn English by watching English – language videos______.

A sometimes

B sometime

C some time

D some times

66. Just now I saw some young children _____together on the playground .

A are playing

B playing

C to play

D have played

67. –The boy can hardly speak Chinese, _______? –No, He’s been in China for only a few weeks.

A can he

B can’t he

C does he

D doesn’t he

68.It’s ve ry impolite ___you ____in line.

A of ,to cut

B for , cut

C of , cut

D for ,to cut

69. My life ____a lot in the last few years .

A change

B has changed

C changed

D changes

70.At that time, I was only ____11-year-old boy, I was a ‘problem child”.

A a

B an Cthe D /

71. My friend Jenny has moved to ____city , I miss her often

A . other

B another

C others

D the others

72.This guitar might ___Alice. She plays the guitar.

A be

B has

C comes from

D belong to

73.—Do you prefer grapes ____bananas?----I prefer grapes ______bananas.

A to, or

B or ,to

C than ,to

D or , than

74. Why can’t we ______to have more time to relax?

A. are allowed B to allow C be allowed D allow

75.Nobody except Lily and Linda ____the man in a white T-shirt.

A know

B is knowing

C have known

D knows

76.She ______speak in class because she thought her classmates would laugh at her.

A was afraid of

B is afraid to

C was afraid to

D is not afraid of

77. I have ____the English club for three terms.

A joined

B been in

C taken part in

D become a member of

78.You ____to the meeting this afternoon if you have something important to do .

A needn’t to come

B don’t need to come

C needn’t coming

D didn’t need coming

79. –May I go swimming now,Mum ?

---No, you ____. You must finish your homework first.

A mustn’t

B may not

C couldn’t

D needn’t

80. The bridge in my hometown is about _______meters long.

A two hundred of

B two hundreds of

C two hundred

D two hundreds

81. If he _____his father , he’d spend more time studying English.

A is

B was

C were

D will be

82 Thanks to the _____English course , I can live in the USA easily.

A six-months

B six- months’

C six –month

D six months

83.The fish smells so _____. ---Thanks . Mum cooks fish very ______.

A good, good

B well,good

C well,well

D good ,well

84.What ______you most? ---Basketball does . I like it best.

A interest

B interests

C interesting

D interested

85.How I miss you !I ____you to come here to see me.( which is wrong)

A hope

B expect

C like

D want

86.---Do you know when the calculator _______? ---Yes , in 1876.

A invented

B inventing

C was inventing

D was invented

87.Did you notice him ______out of the house ?

A to leave

B leave

C left

D leaves

88.When your homework ______, you can watch TV.

A is finished

B finishes

C finished

D is finishing

89. At last the man ______a woman who was two years older than him.

A married with

B got married

C married

D got married with

90.As soon as the bell for break rang, the boys _____to the playground.

A ran into

B ran out of

C ran after

D ran out

91.We should only obey all the school rules ,_______?

A don’t

B aren’t

C can’t

D shouldn’t

92.It’s good for you not to eat ______that’s been cooked in oil.

A anything

B something

C everything

D nothing

https://www.wendangku.net/doc/f34153014.html,st night I listened to a CD______Heart Strings.

A which calls

B that called

C called

D calls

94.Let’s try to be__ honest person.

A a

B an

C the D/

95. I think you will look more beautiful if you wear shoes _____adjustable heals.

A have

B has

C with

D there are

96. Sometimes ,when it’s rainy, I go to school ______my father’s car.

A in

B on

C by

D from

97.I was _____ because I didn’t go to bed until 3o’clock a.m last night.

A embarrassed

B amazed

C excited

D exhausted

98.Yesterday I received a card that ____ “Happy New Year” .

A says

B tells

C speaks

D writes

99.Can you tell me ____ you can come to my birthday party on Friday or not.?

A that

B if

C when

D whether

100. “Help _____to some chicken.” Mrs Smith said to us as soon as the chicken was served.

A yourself

B you

C yourselves Dyours

101.There are many trees on_____sides of the road. They were planted several years ago.

A each

B both

C either

D every

102.Though it was late , ______he went on with his work.

A but

B and

C so

D /

103. Every summer we will have a _____holiday after the exam.

A two month

B two-month

C two-months

D two months

104.Can you tell me ____you can come to my birthday party on Friday or not?

A that

B if

C when

D whether

105. This room is big enough for all of us ______.

A live

B living in

C to live in

D to live

106．All the workers were made ______some extra hours last month.

A. work

B. to work C worked D working

107.Is this _____that you saw in the street yesterday?

A one

B the man

C that

D he

108.You can talk with anyone ______you think is .friendly.

A who

B whom

C which

D the one

109. All _____I want ______a room somewhere.

A that ,is

B what, is

C what ,are

D that are

110. Susan is a girl _____bike was borrowed by me yesterday.

A whose

B who

C whom

D that

111.Is this the coat you ____last Sunday.?

A bought

B have bought it

C bought it

D had bought

112.Look! The man who is ____the bus stop is my English teacher.

A waiting for

B waiting on

C waiting at

D waiting up

113.My father prefers ______to staying at home. He loves playing sports.

A to play football

B to travel

C playing football

D traveling

114. My brother told me there was a good movie ______TV the next week.

A on

B on the

C in

D about

115.The children find that they have no paper_______.

A to write

B to write with Cto write on D write on

116. Why _____home tomorrow? I miss my parents.

A not go

B not going

C not to go

D didn’t go

117.The TV set is too loud . Would you please _____?

A turn down it

B turn it down

C to turn down it

D to turn it down

118.It’s cold outside . You’d better _____your coat.

A to put on

B putting on

C puts on

D put on

119. The toy you bought in the USA ______in China.

A made

B makes

C was making

D was made

120.Our sports meeting has been _____till next Monday because of the bad weather .

A put on

B put off

C put up

D put down

121.I’m not sure if it_____tomorrow. If it ______, we won’t climb the South Hill.

A will snow, snows

B will snow,will snow

C snows , snows

D snows ,will snow 122. –Would you like to visit Shantou City with me this summer vacation?

---No, I ______it before. Besides , it’s hot and humid in summer.

A visit

B visited

C will visit Dhave visited

123. The teacher asked me _____I had finished my homework and I sai d “Yes”.

A what

B if

C that

D /

124.I used to prefer ______to______.

A swimming/running

B swim /run

C swimming/run

D swim/running

125.---Could you tell me if it ____today,please?

---Yes. The radio says there will ____a heavy rain later today.

A will rain/have

B will rain / be

C rains/have

D rains /be

126. I ___the Human food though I’ve been in Changsha for more than one year.

A didn’t use to

B used to

C don’t get used to

D gets used to

127.We shouldn’t eat or dri nk_______walking down the street.

A while

B until

C before

D after

128.Neither of my hands is empty . There is abook in one and there is a long ruler in ____.

A other

B the other

C another

D others

129.The machine doesn’t work ______it says in the advertisement.

A as quickly as

B as good as

C as well as

D as carefully as

130.Ten years has passed _____I started to work in this school.

A since Bbefore C when D until

131.The cinema is next to the park. Walk _____the park and you can get there .

A through

B past

C across

D out

132.Spending time with friends ____ very important to us.

A is

B are

C has

D have

133. They arrived ____ Paris ____ a winter evening.

A at/in

B to/on

C in /on

D in/at

134. I prefer ____ rather than ______.

A to be a teacher/ be a boss

B to be a teacher/ to be a boss

C being a teacher/ being a boss

D be a teacher / be a boss

135.______the help of my classmates ,I’ve improved my English.

A By

B With

C Under

D For

136.Have you checked your licence ______?

A also

B too

C either

D neither

137.You must keep your eyes _____, touch it.

A close

B closed

C closing

D to close

138. My hair is too long . I’ll ha ve it _______tomorrow.

A cut

B being cut

C cutting

D to cut

139.Bill said they would have ______holiday.

A a two-month

B two months

C a two-months

D two month’s 140.—Do you have enough books to read?

---- No, I think we need ______books.

A another two

B other two

C two another

D two the other

141.---Listen, Helen is singing in the next rom.

----It ______be Helen. She has gone to Beijing.

A mustn’t

B can’t

C may Dshould

142.It is a good way to keep both teachers and students_______.

A to happy

B happying

C happy

D happily

143.Many students like reading the book Harry Potter_____by J.K. Rowling.

A written

B was written

C wrote

D was writing

144.I think it’s difficu lt to go _____the forest alone.

A across

B through

C though

D cross

145.The artist hoped ______drawing the picture soon.

A his son to finish

B to finish

C finishing

D his son will finished

146.I visited Hong Kong_____in 2000,and I’d like to travel there again._____

A one day/ a day

B one day/some day

C some day/one day

D some day/ some day 147. He is considering _____a primary school in that mountain village. You surely can’t consider him ____a selfish man.

A building/ to be

B building/being

C to build/being

D to build/to be

148.Mrs Brown will never forget the day ____she met Jane in the street.

A that

B when

C which

D where

149.I am a League member . I volunteer my time _____ others.

A help

B to help

C helping

D helped

150.What’s the best way to _____life’s big and small problems?

A deal with

B do with to

C deal with to

D dealing with

151. He is used to____up early in the morning.

A get

B getting

C to get

D got

152. The abacus was inviented in _____century.

A six

B the sixth

C sixth

D the six

153.If the child ____, please telephone the police.

A found

B is found

C was found

D has found

154.—English is ____useful language, isn’t it? ----Of course it is.

A a

B the

C an D/

155. –How does your mother go to work?

--She usually goes to work ____her car, but sometimes on foot.

A by

B on

C in

D about

156.The big bowl ____wine warm in the old days.

A was used for keeping

B is used by keeping

C was used by keeping

D is used to keep 157. ____people will take part in the meeting next week.

A Hundreds of

B Two hundreds of

C Two hundred of

D Two hundreds

158.What if ____tomorrow?

A it rains

B it will rain

C does it

D will it rain

159.I ______play the piano when I was a young boy .

A wasn’t used to

B wasn’t use to

C didn’t use to

D didn’t used to

160. Now the traffic in our city is becoming ______.than before.

A much heavier

B more heavier

C much heavily

D very heavier

161. But none of the artists knew _____to make the King happy.

A when to do

B what to do

C how to do

D where to do

162. When they got to the station ,the train ______for 20 minutes.

A had left

B went away

C had been away

D had gone

163---May I play soccer with Tom now, Mum?

---When all the homework ______, you may go out to play.

A finish

B will finish Cis finished D will be finished

164. The number of teachers in our school ___60 and a number of them ___male teachers.

A is/are

B are/is

C are/are Dis/is

165.Nick _____a job in a bank, but to our surprise, he didn’t take it.

A is offered

B was offered

C offered

D has offered

166.____ is believed that Bell invented the first telephone in 1876.

A This

B That

C it

D One

【化学】化学 推断题的专项 培优易错试卷练习题

一、中考初中化学推断题 1．已知A 、B 、C 、D 、E 、F 是初中化学常见的物质，其中B 在工业上广泛用于玻璃、造纸、纺织和洗涤剂的生产，D 是红棕色固体，E 、F 常温下为无色气体，其相互反应及转化关系如图所示。（图中“一”表示两端的物质间能发生反应，“→”表示物质间存在转化关系；部分反应物、生成物和反应条件已略去）请回答。 （1）A 所属物质类别是_____（填“酸”“碱”或盐”）。 （2）C 的化学式是_____。 （3）F 的一种用途是_____。 （4）写出D 与E 反应的化学方程式_____。 【答案】酸 H 2O 灭火 23 23CO+Fe O 2Fe+3CO 高温 【解析】 【详解】 （1）A 、B 、C 、D 、E 、F 是初中化学常见的物质，其中B 在工业上广泛用于玻璃、造纸、纺织和洗涤剂的生产，所以B 是碳酸钠，D 是红棕色固体，所以D 是氧化铁，E 、F 常温下为无色气体，E 、F 是一氧化碳或二氧化碳中的一种，E 会与氧化铁反应，所以E 是一氧化碳，F 是二氧化碳，A 会与碳酸钠、氧化铁反应，所以A 是盐酸，盐酸、氧化铁、碳酸钠、二氧化碳都会转化成C ，所以C 是水，经过验证，推导正确，所以A 是盐酸或硫酸，所属物质类别是：酸； （2）C 的化学式是：H 2O ； （3）F 的一种用途是：灭火； （4）D 与E 的反应是一氧化碳和氧化铁在高温的条件下生成铁和二氧化碳，化学方程式为：23 23CO+Fe O 2Fe+3CO 高温。 【点睛】 在解此类题时，首先将题中有特征的物质推出，然后结合推出的物质和题中的转化关系推导剩余的物质，最后将推出的各种物质代入转化关系中进行验证即可。 2．A 、B 、C 、D 都是九年级化学教材中较常见的物质，它们存在下图所示的转化关系（反

100个常见易错易混字词

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初中英语易错题汇总大全单项选择题 12. I do well in playing football, _______. (我妹妹也行。)A. so my sister does(×)B. so does my sister(√) Li Lei is really a football fan. --- _______. (确实这样.) A. So is he(×) B. So he is(√) [析] “so+be动词/助动词+主语”的倒装结构表示前面所述情况也适用于后者，意为“……也是这样”;“so+主语+be动词/助动词”的陈述结构表示对前述情况的肯定，意为“……确实如此”。 19. 例--- He didn’t go to school yesterday, did he?-- _______, though he didn’t feel very well. A. No, he didn’t (×) B. Yes, he did (√) 例--- Don’t you usually come to school by bike?-- _______. But I sometimes walk. A. No, I don’t (×) B. Yes, I do (√) [析] 习惯上英语中的yes意为“是的”，no意为“不”，但在“前否后肯”的反意疑问句或否定疑 问句中，yes意为“不”，no意为“是的”。 20.---- Excuse me, is the supermarket far from here?---- No，it's about _______. A. 7 minutes walk B. 7 minute walk C. 7 minutes' walk D. 7 minute's walk 答案为C。本题考查名词所有格用法。当名词的复数以-s结尾时，则只需要加“'”即可，则“7分钟的距离”为“7 minutes' walk”。 21. You can not imagine how much I ______ on this dress. Is it beautiful? A. paid B. took C. cost D. spent [剖析] 答案为D。本题考察四个表“花费”的动词辨析。主语为人，且和介词on搭配的动词是spend。 22. ---- Do you know _____ university student who is talking with Joe?---- Yes， she，s my cousin, Kate. A. a B. an C. the D. / [剖析] 答案为C。university虽然以元音字母u开头，但其前若使用不定冠词时，则要用 a.不过此题中不能使用不定冠词，而是特指和Joe说话的那个大学生，故要选the。

(完整版)《经济生活》易混易错知识点归纳整理

《经济生活》易混易错知识点归纳整理 1.中国无偿捐赠给海地、智利的救灾物资是商品。（×）自然界中的阳光、空气、水也是商品。（×）（商品是用于交换的劳动产品，救灾物资是无偿捐赠的，没有用于交换。自然界中的阳光、空气、水既不是劳动产品，又没有用于交换。） 2．商品与货币同时产生，是一对孪生兄弟。（×） （货币的出现比商品晚得多，货币是商品交换长期发展的产物。） 3．不同的商品能够交换，是因为它们都具有使用价值。（×） （不同的商品能够交换，是因为它们都是劳动产品，生产它们都耗费了无差别的人类劳动。） 4．货币的本质是商品。（×） (货币的本质是一般等价物。) 5．货币的职能是货币本质的体现。货币具有价值尺度和流通手段的职能，其根本原因在于货币的本质是一般等价物。（√） 6．货币的基本职能是价值尺度和支付手段。（×）（货币的基本职能是价值尺度和流通手段。） 7．货币所具有的表现和衡量其他一切商品价值大小的职能，叫流通手段。（×） （货币所具有的表现和衡量其他一切商品价值大小的职能，叫价值尺度。货币充当商品交换的媒介的职能，叫流通手段。） 8．生产者要为消费者着想，生产质量上乘的商品是因为质量越好，价格越高。（×） （价值是价格的基础，价值决定价格，使用价值是价值的物质承担者，影响价值的实现。） 9．纸币的本质是一般等价物，具有价值尺度和流通手段职能。（×） （纸币的本质是价值符号，不具备价值尺度职能，可以行使流通手段职能。） 国家可以规定纸币的发行量，国家可以规定每种面值纸币代表多少价值（纸币的购买力）（×） （国家只可以规定纸币的面值，无法规定之比的购买力） 10、物价上涨就是通货膨胀，物价下跌就是通货紧缩。（×） （通货膨胀（紧缩）的主要原因是纸币发行量超过（小于）流通中实际需要的货币量，会引起物价全面持续上涨（下跌），本质是社会总需求大于（小于）社会总供给造成的。所以物价上涨不等于通货膨胀，物价下跌不等于通货紧缩。）通货膨胀时国家可以采取紧缩性的财政政策，如提高税率，增加税收；减少财政(经济建设)支出，减少国债的发行量。采取紧缩性的货币政策，如提高银行存贷款利率，提高银行存款准备金率，减少纸币发行量，缩减银行信贷规模。通货紧缩时相反。 11．通货膨胀会引起纸币贬值、物价上涨，影响人民的生活和社会经济秩序；通货紧缩会使商品销售发生困难，直接阻碍商品流通，影响企业生产和投资的积极性，对经济的长远发展和人民的长远利益不利，影响人民的生活和社会经济秩序。 12．外汇是两种货币的兑换比例。（×）（外汇是用外币表示的用于国际间结算的支付手段。） 13．2007月8年24日人民币对美元的汇率基准价为756.91，2008年4月18日人民币对美元的汇率基准价为698.36（注：人民币外汇牌价的标价方法为人民币/100外币）。这一变化表明人民币升值，人民币汇率上升，美元贬值，美元汇率下跌，有利于我国进口，公民出国留学、旅游的成本降低，不利于出口，不利于吸引外商投资，不利于吸引外国旅游者等。（√） 14．一种商品的价格不是固定不变的，时涨时落，但是不会无限上涨，也不会无限下跌。这是因为价格变动受到供求关系的影响，但是价格最终由价值决定的。（√） 15．“物以稀为贵”、“货多不值钱”说明价值决定价格。（×） （“物以稀为贵”、“货多不值钱”说明供求影响价格，供不应求，价格上涨，形成卖方市场；供过于求，价格下跌，形成买方市场。） 16．生产者努力缩短个别劳动时间，提高劳动生产率是因为个别劳动时间决定价值量。（×） （商品价值量是由社会必要劳动时间决定的） 17．社会劳动生产率与商品价值总量成正比。（×）（社会劳动生产率与商品价值总量无关。） 18．商品价格下降的根本原因是个别劳动生产率提高（供过于求）。（×）

中考化学易错题大过关---选择题

中考化学易错题大过关---选择题 1、有一包固体可能含有CaCl 2、Na2SO4、Na2CO 3、KNO3中的一种或几种，现对其进行如下实验：①取少量固体于试管中，加适量蒸馏水，固体完全溶解形成无色透明溶液；②取少量上述溶液，加过量稀盐酸，有气泡产生；③取②所得溶液少量，滴加BaCl2溶液，产生白色沉淀。分析以上实验现象，对原固体组成的推断正确的是（） A．肯定有Na2CO3，无CaCl2 B．肯定有Na2CO3、Na2SO4，无CaCl2 C．肯定有Na2CO3、Na2SO4，可能有KNO3、CaCl2 D．肯定有Na2SO4，可能有KNO3、CaCl2 2、向右图试管里的水中加入下述某种物质后，原来U型管内在同一水平上的红墨水，右边液面降低了些，左边液面上升了些，则加入的物质是（） A、硝酸铵 B、生石灰 C、活性炭 D、烧碱 3、将过量的铁粉放入含AgNO3和Zn(NO3)2的混合溶液中，搅拌，使其充分反应后，过滤，滤纸 上留下的金属是（） A．Ag B．Fe、Ag C．Zn、Fe D．Zn、Fe 、Ag 4、已知X、Y、Z三种金属能发生下列反应：X + H2SO4 == XSO4 + H2↑；Y + Z(NO3)2 == Y(NO3)2 + Z；Z + X(NO3)2 == Z(NO3)2 + X。则X、Y、Z三种金属与氢的活动性由强到弱的顺序为（） A．X>H>Y>Z B．X>H>Z>Y C．Z>Y>X>H D．Y>Z>X>H 5、向4支装有质量和质量分数均相同的稀硫酸的试管中，分别加入适量的Mg、MgO、Mg(OH)2、MgCO3，均恰好完全反应，对应得到①②③④四个都不饱和的溶液，则其中溶质质量分数最大的是 A．① B．② C．③ D．④ 6、下列物质按单质、氧化物、化合物、混合物的顺序排列的是（） A．金刚石、生石灰、粗食盐、冰水混合物 B．水银、干冰、熟石灰、天然气 C．苛性钠、铁锈、纯碱、石油 D．铁粉、液态氧、粗食盐、空气 7、往Cu(NO3)2、Zn(NO3)2的混合溶液中加入一些铁粉，待反应完成后再过滤，不可能的情况是 A．滤纸上有Cu，滤液中有Cu2+、Zn2+、Fe2+ B．滤纸上有Cu，滤液中有Zn2+、Fe2+ C．滤纸上有Cu、Fe，滤液中有Cu2+、Zn2+、Fe2+ D．滤纸上有Cu、Fe，滤液中有Zn2+、Fe2+ 8、下列某小组同学设计的四组试剂中，能用来验证活动性锌>铜>银的是（）

100个常见易错易混字

100个常见易错易混字(括号外为使用正确的词)

高考必备通假字： 1\案：同“按”；审察，察看。动词。“召有司案图，指从此以往十五都予赵。” 2\罢：通“疲”；疲劳。形容词。“罢夫赢老易于而咬其骨。” 3\颁：通“班”；“斑”；头发花白。形容词。“颁白者不负戴于道路矣。” 4\板：同“版”；字版。名词。“板印书籍，唐人尚未盛为之。” 5\暴：同“曝”晒。动词。“虽有槁暴，不复挺者，輮使之然也。” 6\暴：同“曝”暴露，显露。动词。“思厥先祖父，暴霜露，” 7\暴：同“曝”；暴露，显露。动词。“忠义暴于朝廷。” 8\杯：同“杯”；酒器。名词。“沛公不胜杯杓，不能辞。” 9\倍：通“背”，背叛，忘记。动词。“愿伯具言臣之不敢倍德也。” 10\倍：同“背”背叛，违背。动词。“倍道而妄行，则天不能使之吉。” 11\被：通“被”；顶。动词。“被明月兮佩宝璐。” 12\被：同“披”；穿着。动词“闻妻言，如被冰雪。” 13\被：同“披”；覆盖在肩背上，动词。“廉颇为之一饭斗米，肉十斤，被甲上马。” 14\被：同披；覆盖在肩背上。动词。“屈原至于江滨，被发行吟泽畔，” 15\俾倪：同“睥睨”；斜着眼看。形容词。“见其客朱亥，俾倪.” 16\辟：通“避”；躲避。动词。“其北陵，文王所辟风雨也。” 17\辟：通“僻”；行为不正。形容词。“放辟邪侈，无不为已。” 18\弊：通“敝”；困顿，失败。形容词。“秦有余力而制其弊，” 19\弊：通“敝”；疲惫，衰败。“率疲弊之卒，将数百之众，转而攻秦；” 20\弊：通“敝”；疲惫，衰败。形容词。“今天下三分，益州疲弊。”

21\徧：同“遍”遍及，普遍。动词。“小惠末徧，民弗从也。” 22\宾：同“傧”；迎接客人的人。名词“设九宾于廷，臣乃敢上璧。 高考语文最常见的15个多音字 1．暴 [暴bào]暴动、暴怒；暴君、暴殄天物；暴躁、暴跳如雷；自暴自弃；暴虎冯河。 [曝(暴)pù]曝晒、一曝十寒、曝露。 2．辟 [辟pì]开天辟地、另辟蹊径；辟除、辟谣；精辟、透辟。大辟(古代指死刑)、辟言不信(不听信合乎法度的话)。 [辟bì]复辟；辟邪。 3．裨 [裨bì]裨补、大有裨益、无裨于事。 [裨pí]偏裨、裨将。 4．背 [背bai]舌背；手背、墨透纸背、背水一战、背井离乡、背诵、背叛、背道而驰；背时、背静、耳背。 [背bēi]背负、背枪、背篓、背小孩；背债、背包袱、背黑锅。 5．艾 [艾ài]方兴未艾；少艾(年轻漂亮的人)。 [艾yì]自怨自艾；惩艾。 6．拗 [拗niù]执拗、拗脾气。[拗ào]违拗、拗口令。 [拗ǎo]拗断。