文档视界 最新最全的文档下载
当前位置:文档视界 › 高中定语从句易错题集锦

高中定语从句易错题集锦

高中定语从句易错题集锦
高中定语从句易错题集锦

高中英语定语从句易错题集锦

1. The factory was built in a secret place, around ______ high mountains. A. which was B. it was C. which were D. them were

(1)Yesterday we visited a modern hospital, around _______ some fruit shops. A. which is B. it is C. which are D. them are

(2)The murder happened in an old building, beside ______ the city police station. A. which are B. it is C. which is D. them are

(3)Next month we'll move to a new building, next to _______ a nice restaurant where we can have Chinese food. A. which are B. it is C. which is D. them are

2. A man with a bleeding hand hurried in and asked, Is there a hospital around ______ I can get some medicine for my wounded hand A. that B. which C. where D. what

3. _____ is known to everybody, the moon travels round the earth once every month. A. It

B. As

C. That

D. What

_______ is known to everybody that the moon travels round the earth once every month. A. It B. As C. That D. What

(1)______ is mentioned above, the number of the students in senior school is increasing.

A. Which

B. As

C. That

D. It

(2)______ is mentioned above that the number of the students in senior school is increasing.

A. Which

B. As

C. That

D. It

4. David is such a good boy _______ all the teachers like. A. that B. who C. as D. whom

David is such a good boy _______ all the teachers like him. A. that B. who C. as D. whom

It was not such a good dinner _______ she had promised us. A. like B. that C. which D. as

5. The buses, most of _______ were already full, were surrounded by an angry crowd. A. that

B. it

C. them

D. which

(1)His house, for _______ he paid $10, 000, is now worth $50, 000. A. that B. it C. them D. which

(2)Ashdown forest, through _______ we'll be driving, isn't a forest any longer. A. that B. it C. them D. which

(3)This I did at nine o'clock, after _______ I sat reading the paper. A. that B. it C. them D. which

(4)George, with _______ I played tennis on Sundays, was a warm-hearted person. A. that B. him C. them D. whom

(5)Her sons, both of ______ work abroad, will come back home this summer. A. that B. who C. them D. whom

(6)I met the fruit-pickers, several of _______ were still university students. A. that B. who C. them D. whom

6. He had thousands of students, many of ______ gained great success in their own field.

A. whom

B. them

C. which

D. who

(1)He asked a lot of questions, none of ______ was easy to answer. A. which B. them C. what D. that

(2)He asked a lot of questions, and none of ______ was easy to answer. A. them B. which C. what D. that

(3)He told me that he had two girl-friends, neither of _______ knew anything about the other.

A. whom

B. them

C. which

D. who

(4)He told me that he had two girl-friends, and neither of _______ knew anything about the other. A. them B. whom C. which D. who

7. He had a lot of friends, only a few of ______ invited to his wedding. A. whom B. them C. which D. who

(1)They put forward a lot of plans at the meeting, none of _______ carried out in their work. A. which B. them C. what D. that

(2)They put forward a lot of plans at the meeting, none of _______ were carried out in their work. A. which B. them C. what D. that

(3)They put forward a lot of plans at the meeting, but none of _______ were carried out in their work. A. which B. them C. what D. that

8. On Sundays there were a lot of children playing in the park, _______ parents seated together joking. A. their B. whose C. which D. that

(1)On Sundays there were a lot of children playing in the park, _______ parents were seated together joking. A. their B. whose C. which D. that

(2)On Sundays there were a lot of children playing in the park, and _______ parents were seated together joking. A. their B. whose C. which D. that

(3)On Sundays there were a lot of children playing in the park, _______ parents sitting together joking. A. their B. whose C. which D. that

(4)On Sundays there were a lot of children playing in the park, _______ parents sat together joking. A. their B. whose C. which D. that

(5)On Sundays there were a lot of children playing in the park, _______ parents were sitting together joking. A. their B. whose C. which D. that

9. If the man is only interested in your looks, _____ just shows how shallow he is. A. as

B. which

C. what

D. that

(1)If you promise to go with us, _____ will be OK. A. as B. which C. and it D. that (2)If you want a double room, _____ will cost another £15. A. as B. which C. what D. that

(3)Whether you go or not, _______ is quite all right with me. A. that B. which C. and it D. so

(4)When I say two hours, _____ includes time for eating. A. as B. which C. what D. that

10. She says that she'll never forget the time ________ she's spent working as a secretary in our company. A. which B. when C. how D. where

She says that she'll never forget the time ________ she works as a secretary in our company.

A. which

B. when

C. how

D. where

(1)Our company will move to a tall building _______ we bought last month.

A. which

B. when

C. how

D. where

(2)Our company will move to a tall building _______ has just been complete. A. which B. when C. how D. where

(3)Our company will move to a tall building _______ we worked two years ago.

A. where

B. when

C. that

D. which

人教版英语非谓语动词易错题集锦-名师教育含答案解析百度文库

人教版英语非谓语动词易错题集锦-名师教育含答案解析百度文库 一、非谓语动词 1.I really don't know this question. It is too hard. A. which to answer B. how to answer C. what to answer 【答案】 B 【解析】【分析】句意:我真的不知道如何回答这个问题。它太难了。which to answer回答 哪一个; how to answer怎么回答;what to answer回答什么;据It's too hard.可知此处指的是 这个问题太难,不知道如何回答,选B 2.—I think the environment is terrible these years. —Yes, it will be even worse the government takes action it. A. until; protect B. unless; to protect C. if; protecting 【答案】 B 【解析】【分析】句意:——我认为这几年来环境太糟糕了。——是的,环境会变得更糟 糕,除非政府采取措施保护环境。A. until; 直到…为止,B. unless除非,如果不,连词;C. if 如果,连词;until和if放在这里,句意不通顺,take action to do sth. 采取行动去做某事, 动词不定式作目的状语,故选B。 【点评】此题考查连词短语和固定搭配。 3.Would you mind ____________down the music? It's too noisy. A. to turn B. turning C. turn 【答案】 B 【解析】【分析】句意:你介意把音乐的音量调小一些吗?太吵了。A. to turn 不定式 B. turning 动名词(或现在分词) C. turn.动词原形。 mind.意为"介意;在乎"后面只能跟动名 词作宾语,故答案选B。 【点评】考查动名词的用法,掌握固定搭配。 4.Nowadays,most people prefer to________ computer games rather than ___________ books. A. play;reading B. play;read C. playing; reading 【答案】 B 【解析】【分析】句意:现在,大部分人比起读书更喜欢玩电脑游戏。prefer to do A rather than do B比起B更喜欢做A。故答案为B。 【点评】考查动词prefer的用法,掌握固定搭配。 5.—Julia, your mobile phone is ringing. —Wait a minute. It's dangerous ______ it while crossing the street. A. answering B. answer C. to answer

二次根式单元 易错题难题提高题检测

一、选择题 1.下列计算正确的是( ) A = B .2= C .(2 6 = D == 2.,a ==b a 、b 可以表示为 ( ) A . 10 a b + B . 10 -b a C . 10 ab D . b a 3.) 5=( ) A .5+ B .5+ C .5+ D .4.下列各式中,正确的是( ) A 2=± B = C 3=- D 2= 5.下列各式计算正确的是( ) A .6 23 212 6()b a b a b a ---?= B .(3xy )2÷(xy )=3xy C = D .2x ?3x 5=6x 6 6.化简 ) A B C D 7.已知a 满足2018a -a ,则a -2 0182=( ) A .0 B .1 C .2 018 D .2 019 8.如果a ,那么a 的取值范围是( ) A .a 0= B .a 1= C .a 1≤ D .a=0a=1或 9.下列各式成立的是( ) A 2 B 5=- C x D 6=- 10.2的结果是( ) A .±3 B .﹣3 C .3 D .9 二、填空题 11.若m m 3﹣m 2﹣2017m +2015=_____.

12.计算(π-3)02-2 11(223)-4 --22 --() 的结果为_____. 13.设四边形ABCD 是边长为1的正方形,以对角线AC 为边作第二个正方形ACEF ,再以对角线AE 为边作第二个正方形AEGH ,如此下去……. ⑴记正方形ABCD 的边长为11a =,按上述方法所作的正方形的边长依次为 234,,,,n a a a a ,请求出234,,a a a 的值; ⑵根据以上规律写出n a 的表达式. 14.已知()230m m --≤,若整数a 满足52m a +=,则a =__________. 15.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: 22164?a x a x +=则图2所示题目(字母代表正数)翻译为_____________,计算结果为_______________. 16.化简二次根式2a 1 a +- _____. 17.已知:5+2 2可用含x 2=_____. 18.已知实数m 、n 、p 满足等式 33352m n m n m n p m n p -+--+----,则p =__________. 19.4102541025-+++=_______.

高考化学易错题集锦

化学易错题集锦 选择题(每小题只有1个选项符合题意。) 1.已知Co2O3在酸性溶液中易被还原成Co2+,Co2O3、Cl2、FeCl3、I2的氧化性依次减弱。 下列反应在水溶液中不可能发生的是 A.3Cl2+6FeI2=2FeCl3+4FeI3B.Cl2+FeI2=FeCl2+I2 C.Co2O3+6HCl=2CoCl2+Cl2↑+3H2O D.2Fe3++2I-=2Fe2++I2 2.Cu2S与一定浓度的HNO3反应,生成Cu(NO3)2、CuSO4、NO2、NO和H2O,当NO2和NO的物质的量为1∶1时,实际参加反应的Cu2S与HNO3的物质的量之比为 A.1∶7 B.1∶9 C.1∶5 D.2∶9 3.将40g铜与200mL一定浓度的硝酸反应,铜完全溶解产生的NO和NO2混合气体在标准状况下的体积为11.2L。请回答: (1)NO的体积为L,NO2的体积为L。 (2)待产生的气体全部释放后,向溶液加入VmL a mol/L的NaOH溶液,恰好使溶液中的Cu2+全部转化成沉淀,则原硝酸溶液的浓度为mol/L。 (3)欲使铜与硝酸反应生成的气体在NaOH溶液中全部转化为NaNO3, 至少需要30%的双氧水 g。 4.某溶液既能溶解Al(OH)3,又能溶解H2SiO3,在该溶液中可以大量共存的是离子组是A.K+、Na+、HCO3-、NO3-B.Na+、SO42-、Cl-、ClO- C.H+、Mg2+、SO42-、NO3-D.Ag+、K+、NO3-、Na+ 5.下列离子方程式书写正确的是 A.过量的SO2通入NaOH溶液中:SO2+2OH-=SO32-+H2O B.Fe(NO3)3溶液中加入过量的HI溶液:2Fe3++2I-=2Fe2++I2 C.NaNO2溶液中加入酸性KMnO4溶液:2MnO4-+5NO2-+6H+=2Mn2++5NO3-+3H2O D.NaHCO3溶液中加入过量的Ba(OH)2溶液: 2HCO3-+Ba2++2OH-=BaCO3↓+2H2O+CO32- 6.已知1 g氢气完全燃烧生成水蒸气时放出热量121 kJ,且氧气中1 mol 的O=O键完全断裂时吸收热量496 kJ,水蒸气中1mol H-O键形成时放出热量463 kJ,则氢气中1mol H-H键断裂时吸收热量为 A.920 kJ B.557 kJ C.436 kJ D.188 kJ 7.阿伏加德罗常数约为6.02×1023mol-1,下列叙述正确的是 A.2.24LCO2中含有的原子数为0.3 ×6.02×1023 B.0.1L3 mol·L-1的NH4NO3溶液中含有的NH4+数目为0.3 ×6.02×1023 C.5.6g铁粉与硝酸反应失去的电子数一定为0.3 ×6.02×1023 D.4.5gSiO2晶体中含有的硅氧键数目为0.3 ×6.02×1023 8.阿伏加德罗常数约为6.02×1023 mol-1,下列叙述中不正确的是 A.室温下,42.0 g乙烯和丙烯的混合气体中含有的碳原子数约为3×6.02×1023 B.标准状况下,a L甲烷和乙烷混合气体中的分子数约为a/22.4×6.02×1023 C.常温常压下,18.0 g重水(D2O)所含的电子数约为10×6.02×1023

定语从句易错题

1. The factory was built in a secret place, around ______ high mountains. A. which was B. it was C. which were D. them were 解析:最佳答案是C,around which were high mountains 是一个由"介词+which"引出的非限制性定语从句,而在该从句中,主语是high mountains,around which 是表语,所以句子谓语应用复数were,而不是用单数was. 请做以下类例题目(答案均为C): (1)Yesterday we visited a modern hospital, around _______ some fruit shops. A. which is B. it is C. which are D. them are (2)The murder happened in an old building, beside ______ the city police station. A. which are B. it is C. which is D. them are (3)Next month we'll move to a new building, next to _______ a nice restaurant where we can have Chinese food. A. which are B. it is C. which is D. them are 2. A man with a bleeding hand hurried in and asked, "Is there a hospital around ______ I can get some medicine for my wounded hand?" A. that B. which C. where D. what 【解析】最佳答案为C。以上语法分析并不算错,但问题是,照此分析,此句的意思即为:有没有这样一个医院,我在它的附近可以买药治我的手伤?这样的语境显然有点不合情理,因为人们通常是在医院里面治伤,而不是在医院附近治伤。此题选 C 的理由是:句中的around 不是介词,而是副词,意为"在附近";其后的where 引导定语从句用以修饰其前的地点名词hospital,句意为:附近有没有一家医院,我可以去治我的手伤? 3. _____ is known to everybody, the moon travels round the earth once every month. A. It B. As C. That D. What 解析:最佳答案是B。as 引导的是一个非限制性定语从句。 4. _______ is known to everybody that the moon travels round the earth once every month. A. It B. As C. That D. What 解析:此题答案选A,it 为形式主语,真正的主语是后面的that 从句。

中学英语易错题集锦大全211道题

中学英语易错集锦大全211道题(精华珍藏版) 1.Because he was ill yesterday, so he didn’t go to work. (×) Because he was ill yesterday, he didn’t go to work. (√) He was ill yesterday, so he didn’t go to work. (√) [析] 用though, but表示“虽然……,但是……”或用because, so 表示“因为……,所以……”时,though和but 及because和so 都只能择一而用,不能两者同时使用。 2.The Smiths have moved Beijing. (×) The Smiths have moved to Beijing. (√) [析] 不及物动词后接名词或代词作宾语时,要在动词之后加上适当的介词;但不及物动词 后接home, here, there等副词作宾语时,动词之后不必加任何介词。 3.The box is too heavy for him to carry it. (×) The box is too heavy for him to carry. (√) [析] the box既是这句话的主语, 也是不定式to carry的逻辑宾语,若句末再加上it,就和the box重复了。 4.Each of the boys have a pen. (×) Each of the boys has a pen. (√) [析] 复数名词前有表个体的each of, one of, every,either of等词组修饰,或有表否定的neither of, none of 等词组修饰时,谓语动词要用单数形式。 5.例:那是你心软!我不就是一个例子吗? Neither he nor you is good at English. (×) Neither he nor you are good at English. (√) [析] either... or..., neither... nor..., not only..., but also... 等词组连接句子的两个主语时,

人教版初中数学二次根式易错题汇编及答案

人教版初中数学二次根式易错题汇编及答案 一、选择题 1.下列各式中,运算正确的是( ) A .632a a a ÷= B .325()a a = C .= D = 【答案】D 【解析】 【分析】 利用同底数幂的除法、幂的乘方、二次根式的加法和二次根式的除法法则计算. 【详解】 解:A 、a 6÷a 3=a 3,故不对; B 、(a 3)2=a 6,故不对; C 、和不是同类二次根式,因而不能合并; D 、符合二次根式的除法法则,正确. 故选D . 2.在实数范围内有意义,则a 的取值范围是( ) A .a≤﹣2 B .a≥﹣2 C .a <﹣2 D .a >﹣2 【答案】B 【解析】 【分析】 在实数范围内有意义,则其被开方数大于等于0;易得a +2≥0,解不等式a +2≥0,即得答案. 【详解】 在实数范围内有意义, ∴a +2≥0,解得a ≥-2. 故选B. 【点睛】 本题是一道关于二次根式定义的题目,应熟练掌握二次根式有意义的条件; 3.已知实数a 满足2006a a -=,那么22006a -的值是( ) A .2005 B .2006 C .2007 D .2008 【答案】C 【解析】 【分析】 先根据二次根式有意义的条件求出a 的取值范围,然后去绝对值符号化简,再两边平方求

出22006a -的值. 【详解】 ∵a-2007≥0, ∴a ≥2007, ∴2006a a -=可化为a 2006a -+=, 2006=, ∴a-2007=20062, ∴22006a -=2007. 故选C . 【点睛】 本题考查了绝对值的意义、二次根式有意义的条件,求出a 的取值范围是解答本题的关键. 4.下列计算中,正确的是( ) A .= B 1 b =(a >0,b >0) C = D . =【答案】B 【解析】 【分析】 a≥0,b≥0 a≥0,b >0)进行计算即可. 【详解】 A 、 B 1b (a >0,b >0),故原题计算正确; C ,故原题计算错误; D 3 2

(人教版)高一化学必修一(全册)易错题解题技巧汇总

(人教版)高一化学必修一(全册)易错题解题 技巧汇总 易错点一:钠的物理性质与化学性质 【易错题典例】在研究金属钠与水反应的实验中,反应过程中所观察到的现象与金属钠的下列性质无关的是() A.钠的熔点低B.钠的密度小 C.钠的硬度小D.钠的金属活动性很强 【答案】C

【错因分析】以钠与水的反应为载体,考查钠的物理性质与化学性质;易错点:(1)对钠与水的反应原理不明确,2Na+2H2O=2NaOH+H2↑;(2)实验现象不熟悉;(3)现象与性质不吻合,如钠浮在水面上得到钠的密度比水小,而不是比水大或其它性质,钠熔化体现钠的熔点低,而不是硬度低。 【解题指导】明确钠与反应的实验现象及钠的性质是解题关键,其中钠单质很软,具有银白色金属光泽,是热和电的良导体.钠的密度比水小,比煤油大,熔点97.81℃,沸点882.9℃,与水反应的实验现象有: 主要实验现象对实验现象的分析 浮在水面上密度比水小 熔化成闪亮的小球反应放热,且钠的熔点低 迅速游动反应产生气体(H2) 嘶嘶作响反应剧烈 溶液呈红色反应生成NaOH,遇酚酞变红 易错点二:碱金属的性质 【易错题典例】钙和钠相似,也能形成过氧化物,则下列叙述正确的是() A.过氧化钙的化学式是Ca2O2 B.1mol过氧化钠或过氧化钙跟足量水反应都生成0.5mol氧气 C.过氧化钙中阴阳离子数之比为2:1 D.过氧化钙中只含离子键 【答案】B 【解析】A.氧化钙的化学式是CaO2,故A错误;B.因过氧化钠或过氧化钡跟水反应:2H2O+2Na2O2=4NaOH+O2↑,2H2O+2CaO2=2Ca(OH)2+O2↑,都是1mol过氧化物跟足量

(易错题精选)初中英语语法知识—定语从句的易错题汇编及答案(1)

一、选择题 1.The four tools _________ people use for Chinese handwriting are called“Four Treasures of Study”. A.that B.who C.what D.whom 2.Shirley is the girl ______ taught me how to use Wechat(微信). A.whom B.which C.who 3.The painting by Picasso ________ is about people’s love for life is shown in the museum. A.who B.which C.what 4.-- Class, you should be thankful to those people _______ helped and supported you. -- We will. Miss Chen. A.which B.whom C.who D.whose 5.Those students ____ from England like Chinese food very much. A.who is B.which are C.that is D.who are 6.—Qingdao is the most beautiful city ________ I’ve ever been to. —So it is. Many international meetings are held there every year. A.that B.which C.who D.where 7.Lily doesn’t know what she and her friends can do to help the little boy _______parents have left their hometown for making money. A.that B.who C.whom D.whose 8.The film _____________ I like best is Frozen. A.who B.where C.which 9.Yuan Longping is a Chinese scientist __________ is leading a research to develop sea rice. A.whose B.which C.who 10.The movie ______ we saw last night was fantastic. A.that B.what C.whose D.Who 11.— What are you doing, Tim? — I am listening to the song Long Live _______ makes me feel excited. A.which B.who C./ 12.This is the small village inn ______ not long ago. A.we stayed B.where we stayed C.which we stayed D.where we stayed in 13.—Have you heard of Junko Tabei? —Yes, she was the first woman ________ succeeded in reaching the top of Qomolangma. A.who B.whom C.which D.that 14.This photo often reminds the man of his grandfather ________ died five years ago.

二次根式易错题难题

二次根式易错题难题 1、当 时, 有意义 2、计算: 3、计算: 4、计算: (a >0,b >0,c >0) 5、计算: = = 6、 7、 则 2006个3 2006个4 8、 9、观察以下各式: 利用以上规律计算: 10、已知 一、选择题 11、若32+x 有意义,则 ( ) A 、 B 、 C 、 D 、 12、化简 的结果是 ( ) A 、0 B 、2a -4 C 、4 D 、4-2a 13、能使等式 成立的条件是 ( ) A 、x ≥0 B 、x ≥3 C 、x >3 D 、x >3或x <0 14、下列各式中,是最简二次根式的是 ( ) A 、 x 8 B 、b a 25 C 、2294b a + D 、 15、已知 ,那么 的值是 ( ) A 、1 B 、-1 C 、±1 D 、4 16、如果 ,则 a 和 b 的关系是 ( ) A 、a ≤b B 、a b 17、已知xy >0,化简二次根式 的正确结果为 ( ) A 、 B 、 C 、 D 、 18、如图,Rt △AMC 中,∠C=90°, ∠AMC=30°,AM ∥BN ,MN=2 cm , BC=1cm ,则AC 的长度为 ( ) A 、2 3cm B 、3cm C 、 D 、 19、下列说法正确的个数是 ( ) ①2的平方根是 ;② 是同类二次根式; ③ 互为倒数;④ A 、1 B 、2 C 、3 D 、4 20、下列四个算式,其中一定成立的是 ( ) ① ; ② ; ③ ④ A 、①②③④ B 、①②③ C 、①③ D 、① 三、解答题 21、求 有意义的条件(5分) 22、已知 = a -1() = 2232)(= c b a 2 382)(= += += +222222444333443343,,= +22444333 = +-2006 2005 ) 12() 12(() = +??? ??++++++++120062005200613412311 21 2 3 - ≥x 23-≤x 32 - ≥x 32-≤x 2 )2(2-+-a a 3 3 -= -x x x x 2 y 5 1 =+x x x x 1-121 22-=+-?-b ab a b a 2 x y x - y y -y -y --3 M A N B C cm 323a a 2.05与21 212+-与3223--的绝对值是1 122 2+=+a a )(a a =2 ) (0>?=ab b a ab 11)1)(1(-?+=-+x x x x 1 1 +-x x 2 1 4422-+-+-= x x x y

高考化学易错题集锦 有机化学

有机化学 学校:___________姓名:___________班级:___________考号:___________ 一、选择题 1.下列关于蛋白质的说法中不正确 ...的是( ) A.蛋白质属于天然有机高分子化合物,没有蛋白质就没有生命 B.HCHO溶液或(NH4)2SO4溶液均能使蛋白质变性 C.某些蛋白质跟浓硝酸作用会变黄 D.可以采用多次盐析或多次渗析的方法分离、提纯蛋白质 2.检验溴乙烷中含有溴元素存在的实验步骤、操作和顺序正确的是() ①加入AgNO3溶液②加入NaOH溶液③加入适量HNO3④加热煮沸一段时间 ⑤冷却 A.②④⑤③① B.①②④ C.②④① D.②④⑤① 3.下列说法正确的是() A. 酯化反应的实质是酸与醇反应生成水,与中和反应相似 B. 醇与所有酸的反应都是酯化反应 C. 有水生成的醇与酸的反应并非都是酯化反应 D. 两个羟基去掉一分子水的反应就是酯化反应 4.下列作用中,不属于水解反应的是() A.吃馒头,多咀嚼后有甜味 B.淀粉溶液和稀硫酸共热一段时间后,滴加碘水不显蓝色 C.不慎将浓硝酸沾到皮肤上会出现黄色斑 D.油脂与NaOH溶液共煮后可制得肥皂 5.下面有关石油、煤工业的叙述正确的是() A.石油的催化裂化属于石油化工 B.石蜡来自石油减压分馏产品中提炼而得 C.煤中含有的苯、甲苯等芳香烃可由干馏产物煤焦油再分馏而得到 D.煤化工产品如萘是苯的同系物 6.下面有机物的性质或反应的判断,正确的是() A.分子中的碳原子数≥2的卤代烃均可发生消去反应,有不饱和键的有机物生成 B.用乙烷氯代或乙烯氯化都能制取氯乙烷,且后者产率高 C.在一定条件下使溴乙烷和氨反应可制得R—NH2形式的有机胺 D.氯代烷类的沸点比对应的烷高,所以它们都不会是气态有机物。 7.醛X和醛Y,分子中相差1个碳原子,它们的相对分子质量也不相同。现将0.29gX 和0.30gY相混合,与足量的银氨溶液反应,在醛被完全氧化后,析出银4.32g,则X,Y两醛是() A.甲醛和乙二醛 B.乙醛和丙醛 C.丙醛和苯甲醛 D.只能判断其中有甲醛另一醛无法求得 8.下列各组物质不属于 ...同分异构体的是() A.2,2-二甲基丙醇和2-甲基丁醇 B.邻氯甲苯和对氯甲苯 C.2-甲基丁烷和戊烷 D.甲基丙烯酸和甲酸丙酯 9.下列各组混合物中,无论以何种比例混合,取n mol使之充分燃烧,耗氧量为定值的是()

英语定语从句易错题精选(1)

必备英语英语定语从句易错题精选 一、定语从句 1.The girl catches the flowers on a wedding will be the next to get married. A.whom B.which C.who D.whose 【答案】C 【解析】 考查定语从句的用法。Whom指人,作从句的宾语;which指物,作从句的主语或宾语;who指人,作从句的主语或宾语;whose即指人也指物,作从句的定语,后跟名词。根据动词“catches”可推断关系词作从句的主语,而“the girl”指人,故选C。 2.—Have you ever heard of Langlang? —Sure. He is one of ______ pianists ______ I have even seen. A.good; that B.much better; who C.the best; which D.the best; that 【答案】D 【解析】 【分析】 【详解】 句意:——你有没有听说朗朗?——当然听说了。他是我见过的最好的钢琴家之一。Good 好的,better更好的;best最好的。形容词的比较级前可用much修饰,表示程度;形容词的最高级前通常要加定冠词。one of……之一,其后面的中心名词用复数形式,该名词前的形容词用最高级形式。先行词pianists在宾语从句中作宾语,他的前面有最高级修饰,该用关系代词that代替。所以选D。 3.Xiandao Lake in Yangxin is the famous place ________ we'll visit next week. A.that B.who C.where D.whom 【答案】A 【解析】 试题分析:句意:阳新的仙岛湖是我们下周要参观的著名的地方。本句考查定语从句,先行词是place,从句意来看,其在定语从句中作visit的宾语,指事物,因此关系词用that。故选A。 考点:考查定语从句。 4.Yesterday Li Ming went to the village ______ his family lived ten years ago. A.when B.which C.where D.that

高中英语易错题专题汇总42题

高中英语易错题专题汇总42题 1. I wanted some tea, but there was _____ left. A. no one B. a little C. none D. nothing 2.---I’ve been told that the work is unfinished. ---It’s true. They ____ have been finished it half-way. A. mustn’t B. can’t C. shouldn’t D. wouldn’t 3.They must have gone out climbing last Sunday,____ they? A. can’t B. haven’t C. hadn’t D. didn’t 4.He was ____ boy with ____ little money in his pocket ____ no one paid any attention to him. A. so little a; so; that B. such a little; so; as C. a very little; /; that D. such little; so; that 5. -----____ is the way from your home town? -----It's about 20 km from here. A. How far B. How long C. How many D. How much 6. My pen ____ better than yours. I may lend it to you. A. is written B. wrote C. writes D. is writing 7. -----May your pen be in your pencil-box? -----Ah, ____. A. so it may B .so it is C. so is it D. so may it

二次根式易错题难题

二次根式易错题难题 1、当a 时, 有意义 2、计算: 3、计算: 4、计算: (a >0,b >0,c >0) 5、计算: = = 6、 7、 则 2006个3 2006个4 8、 9、观察以下各式: 利用以上规律计算: 10、已知 一、选择题 11、若32+x 有意义,则 ( ) A 、 B 、 C 、 D 、 12、化简 的结果是 ( ) A 、0 B 、2a -4 C 、4 D 、4-2a 13、能使等式 成立的条件是 ( ) A 、x ≥0 B 、x ≥3 C 、x >3 D 、x >3或x <0 14、下列各式中,是最简二次根式的是 ( ) A 、x 8 B 、b a 25 C 、2294b a + D 、 15、已知 ,那么 的值是 ( ) A 、1 B 、 -1 C 、±1 D 、4 16、如果 ,则a 和b 的关系是 ( ) A 、a ≤b B 、a b 17、已知xy >0,化简二次根式 的正确结果为 ( ) A 、 B 、 C 、 D 、 18、如图,Rt △AMC 中,∠C=90°, ∠AMC=30°,AM ∥BN ,MN=2 cm , BC=1cm ,则AC 的长度为 ( ) A 、23cm B 、3cm C 、3.2cm D 、 19、下列说法正确的个数是 ( ) ①2的平方根是 ;② 是同类二次根式; ③ 互为倒数;④ A 、1 B 、2 C 、3 D 、4 20、下列四个算式,其中一定成立的是 ( ) ① ; ② ; ③ ④ A 、①②③④ B 、①②③ C 、①③ D 、① 三、解答题 21、求 有意义的条件(5分) 22、已知 求3x +4y 的值 23、化简625①- ②627- 24、在实数范围内将下列各式因式分解 ① ② ③ ④ 25、已知实数a 满足 ,求a -20052的值 26设长方形的长与宽分别为a 、b ,面积为S ①已知 ;②已知S= cm 2,b = cm,求 a 27、①已知 ; ②已知x = 求x 2-4x -6的值 28、已知Rt △ABC 中,∠ACB=90°,AC=22cm , BC=10cm ,求AB 上的高CD 长度 29、计算: 30、已知 ,求① ;② 的值 ()=-231)(a -1()= 2232)(=c b a 2382)(= +=+=+222222444333443343,,= +22444333 = +-20062005)12()12(()= +??? ??++++++++12006200520061341 231 121 23 -≥x 23 -≤x 32-≥x 3 2-≤x 2)2(2-+-a a 33-=-x x x x 2 y 51 =+x x x x 1-12122-=+-?-b ab a b a 2x y x -y y -y -y --3M A N B cm 323 a a 2.05与21212+-与3223--的绝对值是11222+=+a a )(a a =2)(0>?=a b b a ab 11)1)(1(-?+=-+x x x x 11+-x x 214422-+-+-=x x x y 3322+-x x 752-x 44-x 44+x a a a =-+-200620057250S cm b cm a ,求,1022==C A B D ()()()()121123131302-+-+---+

高一化学易错题及典型题型

高一化学易错题集锦及分析一元素化合物与化学概念部分【易错题】 一、元素化合物知识 1、下列物质既能与盐酸反应又能与NaOH溶液反应的是() A、Na 2CO 3 B、KHCO 3 C、Al 2O 3 D、NaHSO 4 解析:本题重点考查两点: (1)弱酸的酸式盐既能与强酸反应,又能与强碱反应,例如B选项:HCO 3 -+ H+=H 2O+CO 2 ↑;HCO 3 -+OH-=H 2 O +CO 3 2- (2)Al 2 O 3 是两性氧化物,既能和 强酸又能和强碱反应。这是在初高中知识衔接讲解物质分类提到的。反应方程式到高二 学,现在了解:Al 2O 3 +6H+=3H 2 O+2Al3+;Al 2 O 3 +2OH-=2AlO 2-+H 2 O。以后既能和强酸又能和 强碱反应的物质将拓展为一个小专题,现在就要注意积累。答案:BC 2、下列关于Na 2O 2 的叙述正确的是 () A、Na 2O 2 是淡黄色固体,久置于空气中 变成Na 2O B、Na 2 O 2 与水的反应中,Na 2 O 2 只作氧化 剂 C、用Na 2 O 2 漂白过的织物、麦杆等日久 又渐渐变成黄色 D、Na 2 O 2 放入饱和NaOH溶液中,放出大 量的O 2 ,并有白色固体析出 解析:A选项应中Na 2 O 2 久置于空气中 会变成Na 2 CO 3 ;B选项Na 2 O 2 与水的反应中, Na 2 O 2 既作氧化剂又作还原剂,是氧化还原中 的歧化反应;C选项Na 2 O 2 由于强氧化性而漂 白物质,漂白之后不会再变色;D选项饱和 NaOH溶液中放入Na 2 O 2 ,由于Na 2 O 2 与水反应, 放出大量的O 2 ,水少了,溶质NaOH增多了, 会有白色固体NaOH析出。其中C选项可漂 白的物质也应总结成小专题,现阶段学过的 有:活性炭,吸附褪色,物理变化;Na 2 O 2 、 HClO由于强氧化性褪色,化学变化。以后 注意继续补充。答案:D 3、经过下列试验,溶液仍为澄清透明的 是() A、饱和Na 2 CO 3 溶液中通入足量CO 2 B、NaHCO 3 溶液中加入过量NaOH溶液 C、Ca(HCO 3 )溶液中加入过量KOH溶液 D、少量的CO 2 通入CaCl 2 溶液中

定语从句易错题集锦

定语从句错题集锦 1.The thought of going back home was ________ kept him happy while he was working abroad. A. all that B. all C. which D. that 2. ---Do you have anything to say for yourselves? --- Yes, there’s one point______ we must insist on. A. why B. where C. how D. / 3. After graduation she reached a poiont in her career _______ she needed to decide what to do. A. that B. what C. which D. where 4. She’ll never forget her stay there ______ she found her son who had gone missing two years before. A. that B. which C. where D. when 5. All the neighbors admire this family, ______ the parents are treating their child like a friend. A. why B. where C. which D. when 6. Later in this chapter cases will be introduced to readers _______ consumer complaints have resulted in changes in the law. A. where B. when C. who D. which 7. Occasions are quite rare ______ I have time to spend a day with my kids. A. who B. which C. why D. when 8. Those successful deaf dancers think that dancing is an activity _______ sight matters more than hearing. A. when B. whose C. which D. where 9. ---Is that the small town you often refer to? ---Right, just the one _______ you know I used to work for years. A. that B. which C. where D. what 10. For many cities in the world, there is no room to spread out further, _______ New York is an example. A. for which B. in which C. of which D. above which 11. Human facial expressions differ from those of animals in the degree _______ they can be controlled on purpose. A. with which B. to which C. of which D. for which 12. We saw several natives advancing towards our party, and one of them came up to us, _______ we gave some bells and glasses. A. to which B. to whom C. with whom D. with which 13. I saw a woman running toward me in the dark. Before I could recognize who she was, she had run back in the direction ________ she had come. A. of which B. by which C. in which D. from which 14. He regularly checked his secret drawers, ________ were stored some precious paintings and jewels. A. that B. which C. whom D. where 15. Culture refers to a group or community _______ we share common experiences that shape the way we understand the world. A. with which B. that C. for which D. what 16. When people talk about the places of interest in China, the first _______ comes into mind is the Summer Palace. A. one B. that C. of them D. of which 17. Is this research center ______ you visited the modern equipment last year? A. where B. that C. the one that D. the one where

相关文档 最新文档