状语从句易错题
状语从句易错题集锦
_________, he was eager to buy a computer.
A.Short of money as he was
B. Lack of money though he was
C. As he was short of money
D. He was short of money
It was five o’clock______the news came that a violent earthquake stuck the town and twenty people were killed.
A that
B when
C since
D before
---Mom, what did your doctor say?
---He advised me to live _____the air is fresher.
A in where
B in which
C the place where
D where
_______his pet dog, he can’t have it sleeping on his bed.
A However much does he like
B However much he likes
C However does he like
D However he likes
He was looking for his briefcase _____ he might have put it.
A. as he thought
B. where he thought that
C. wherever he thought
D. in the places he thought
_______modeling business is by no means easy to get into, the good model will always be in demand.
A.Since
B. While
C. As
D. If
What was the party like?
Wonderful. It’s years________I enjoyed myself so much.
A.after
B.when
C.before
D.since
What kind of dress are you going to make?
I'd like something________the one you are wearing.
A.as
B. like
C. as such
D. such like
_______halfway through the project, the board changed their minds and called it off.
A.When only being
B. When we were only
C. Being only
D. Having been
________I enjoyed the holiday on the seaside, I was glad to be home. Anyway, there is no place like home.
A.Much as
B. In spite of
C. As long as
D. Even
The WTO cannot live up to its name ____________it does not include a country that is home to one fifth of mankind.
A.as long as
B. while
C. if
D. even though
__________born in Manchester, he studied and later worked as CEO of a famous company in Chicago.
A.As
B. Although
C. Since
D. When
There is _________that she is strict in her work though she has a hot temper sometimes.
A.no deny
B. no denying
C. not denying
D. not denied
Mike's leg got seriously hurt while _______up Mount Tai.
A.climbing
B. having climbed
C. climbed
D. he climbed
__________，I have never seen anyone who's as capable as John.
A.As long as I have traveled
B.Now that I have traveled so much
C.Much as I have traveled
D.As I have traveled so much
He was about to tell me the secret _________someone patted him on the shoulder.
A.as
B. until
C. while
D. when
________advice I gave him, he just does what he wants to.
A. However
B. Whatever
C. What
D. No matter
_______breaks the law must be punished. That is to say, we will punish _________breaks the law.
A.Whoever, whoever
B. No matter who, whoever
C. Whoever, whom
D. Any one, no matter who
________in the sun for such a long time, the photo turned yellow.
A.Being exposed
B. Having exposed
C. Exposed
D. Having been exposed
It was about five o'clock in the morning ____________I finished writing the article.
A. which
B. since
C. when
D. that
______________,the children would not be so afraid.
A.If their parents are here
B. Their parents were here
C. If here were their parents
D. Were their parents here
The time is not far away____________modern communications will become widespread in China's vast countryside.
A.when
B.before
C.until
D.as
It must be morning, _________the birds are singing.
A.because
B.as
C.since
D.for
It was quite some time_________the president managed to save his firm from near bankruptcy. A.until B.when C.that D.before
过了相当长时间公司总裁把面临破产的公司救了出来。
We were watching TV___________we caught sight of a friend of ours.
A.as soon as
B.while
C.when
D.once
________reason you may give, you ought not to have left homework unfinished.
A. What
B.No matter
C.However
D.Whatever
Although he knew little about much of the work done in the field, he was lucky to succeed_________other more well-informed experiments failed.
A. which
B.what
C.what
D.where
It seemed only seconds_________the boy finished washing his socks.
A. when
B.till
C.after
D.before
Unlike watching TV, reading is highly active process _______ it requires attention as well as memory and imagination.
A. until
B. for
C. unless
D. but
_______they will not come to join us, we have to change our plan.
A.Seeing that
B. When
C. For
D. As soon as
_______I am aware, there were no problems during the first six months.
A.As far as
B. So much as
C. Much more than
D. Except that
_______to the lab than he set out to do the experiment.
A.Hardly had he got
B. No sooner had he got
C. No sooner did he get
D. Hardly did he get
Scott teaches in a language school, ____________ he is working in a company at the moment _______the school is on holiday.
A.when...as
B. though...because
C. for…when
D. before...until
(易错题精选)初中英语语法知识—形容词的全集汇编
一、选择题 1．With the development of modern science, it’s ________for us to get information from all over the world. A．slower B．easier C．harder D．busier 2．I can’t tell you how fantastic the film Secret Superstar is! It’s the ______ one I have ever seen. A．better B．best C．worse D．worst 3．—How is your head teacher? —Our head teacher is _________ with us and we usually feel nervous in his lesson. A．kind B．pleased C．strict D．good 4．―is the population of China? ―It’s about 1.4 billion. I think it's becoming . A．what, more and more B．How many, larger and larger C．What, larger and larger D．How much, smaller and smaller 5．一Lucy, do you have any plans to spend your five-day holiday? 一I will go to Xiamen a second time. I have never visited city A．a most fantastic B．the most fantastic C．a more fantastic D．the more fantastic 6．Rowan was listed in the top 50 ________ people ever by a group of comedians. A．funny B．funnier C．funniest D．the funniest 7．I'm surprised that Jenny is 42. I thought she was , for she seems to be in her thirties. A．younger B．older C．young D．old 8．- I’m very tired these days because of this exam. - Why not listen to music? It can make you ______. A．relaxed B．sad C．scared D．bored 9．It is said that e-schoolbags are going to be brought into use in Chinese middle schools soon. In fact. It is a small computer that is __________ than a usual schoolbag but holds all the things for study, such as a _________，an exercise book and so on． A．much smaller, testbook B．even smaller, textbook C．far smaller, comic book 10．—Sonia, do you think you are different from Linda? —Yes. I'm ______ at drawing than her. A．better B．good C．well D．best 11．—Judy, what do you think of your junior high school life? —I think it is one of ______ periods in my life. A．wonderful B．the most wonderful C．more wonderful 12．Steven is always ready to help others. What a(n)______ boy! A．kind B．healthy C．honest D．clever 13．A walk every day is enough to keep you healthy and in good shape．
让步、条件状语从句
条件状从和让步状从练习 一．单选题 1._______ the forest park is far away, a lot of tourists visit it every year. A. As B. When C. Even though D. In case 2. The experiment shows that proper amounts of exercise, if ______ regularly, can improve our health. A. being carried out B. carrying out C. carried out D. to carry out 3. You will never gain success you are fully devoted to your work. A. when B. because C. after D. unless 4. It is hard for the Greek government to get over the present difficulties_________ it gets more financial support from the European Union. A. if B. unless C. because D. since 5. It was a nice meal, _______a little expensive. A. though B. whether C. as D. since 6. I don’t really like the author,_______ I have to admit his books are very exciting. A. although B. unless C. until D. once 7. I don't believe we've met before, _____ I must say you do look familiar. A. therefore B. although C. since D. unless 8. You can’t borrow books from the school library ______ you get your student card. A. unless B. if C. while D. as 9. I'll be out for some time. ______ anything important happens, call me up immediately. A. In case B. As if C. Even though D. Now that 10. One's life has value ____one brings value to the life of others. A. so that B. no matter how C. as long as D. except that 二．填空题 11. In the global economy, a new drug for cancer, ______ it is discovered, will create many economic possibilities around the world. 12. One can always manage to do more things, ____ full one’s schedule is in life. 13.________ great difficulties we are faced with, we’ll never give up. 14. ________ great the difficulties are, we’ll never give up. 15. ______ we have enough evidence, we can't win the case. 16. If _____ to look after luggage for someone else, inform the police at once. (ask) 17.____________ the weather is like tomorrow, I will set out for Hongkong. 18. Many of them turned a deaf ear to his advice ___________ they know it to be valuable. 19. Much ______ I admire David as a poet, I don’t like him as a man. 20. In time of serious accidents, ______ we know some basic things about first aid, we can save lives. 三．改错题 21、It won’t matter even he refuses. 22. Though the work was difficult, but we managed to finish it in time. 23. I’m not going to talk on the point any further, though it is neither important nor very interesting. 24. You will be late if you leave immediately. 25. Take an umbrella with you in case of it should rain.
二年级下册数学易错题分析
二年级下册数学易错题分析 第一单元解决问题 错例1 题目描述： 典型错解： 错因分析： 学生在解决问题的过程中，对于用两种方法解决问题有所误解，认为像综合算式48-7+12=53（人）和分式48-7=41、41+12=53（人）两种算式的形式不一样就是两种列式的方法，没有将其与解决问题的思路联系起来，再加上教师在讲授的时候没有有效引导，从而导致这样的错误出现。
教学建议： 教师在引导学生认真审题的同时，也要引导学生交流和反馈解题的思路，使学生明确48-7+12=53（人）这个算式中，4第一步48-7就表示转走7人以后班级的人数，再加上12表示转来后现在学生的人数。对比分式48-7=41、41+12=53（人）不难发现，二者的解题思路是一样的，从而告诉学生解题思路相同的算式是相同的方法，激发学生从另外一个角度思考问题，如48+12-7=53，先求出转来后的班级人数，再求转走后的班级总人数。 错例2 题目描述： 校园里有22盆菊花，月季花比菊花多13盆，两种花一共有多少盆？ 典型错例： 错因分析： 通过学生的做题，可以分析出造成学生错误的原因大致有两个：首先是学生审题不够仔细，对于问题没有认真分析，想当然的拿两个已知的数字22和13相加；其次学生对其中的数量关系不够明确，没有认真分析其中的两个已知条件以及要求的问题，特别是“月季花比菊花多13盆”这个中间条件分析得不够透彻，以至于不知其所以然。
在教学过程中，教师要引导学生反复阅读题目，认真分析其中的数量关系，知道要想求“两种花一共有多少盆”这一问题，必须知道月季花和菊花各多少盆，从而顺着问题去找。学生进而从已知的条件中知道菊花有22盆，但月季花需要借助“月季花比菊花多13盆”这一中间条件去求，从而知道月季花可以用“22+13”这一式子表示，找到了两个必须的条件，“两种花一共多少盆”学生就可以列式22+13+22=57（盆）。因此在此类知识上，引导学生对于已知条件和数量关系的分析是今后教师教学的重心。 错例3 题目描述： 小红：我今年6岁。妈妈：我的年龄是小红的6倍。妈妈比小红大几岁？ 典型错例： 错因分析： 学生出现此类错误的原因主要是审题不够仔细，对于问题没有斟酌就开始下笔，以至于答非所问。另外一个原因就是，学生对已知条件的分析还不到位，对于“我的年龄是小红的4倍”这一中间条件理解还不是很透彻。
受力分析练习题(含标准答案及详解)
精选受力分析练习题35 道（含答案及详解） 1．如右图 1 所示，物体M 在竖直向上的拉力 F 作用下静止在斜面上，关于M 受力的个数，下列说法 中正确的是（ D ） A．M 一定是受两个力作用B．M 一定是受四个力作用 C．M 可能受三个力作用D．M 不是受两个力作用就是受四个力作用 ２．（多选）如图 6 所示，两个相似的斜面体A、B 在竖直向上的力 F 的作用下静止 靠在竖直粗糙墙壁 上。关于斜面体A和 B 的受力情况，下列说法正确的是（ＡＤ） 图6 A ．A 一定受到四个力 B．B 可能受到四个力 C．B 与墙壁之间一定有弹力和摩擦力D．A 与B 之间一定有摩擦力 3、如图3所示，物体A、B、C 叠放在水平桌面上，水平力F作用于C物体，使A、 B 、 C 以共同速度向右匀速运动，那么关于物体受几个力的说法正确的是（ A ） A．A 受6个，B 受2个，C受4个B．A 受5个，B 受3个，C 受3个 C．A 受5个，B 受2个，C受4个D．A 受6个，B 受3个，C 受4个 ４.（多选）如图5所示，固定的斜面上叠放着A、B 两木块，木块 A 与 B 的接 触面是水平的，水平力F 作用于木块A，使木块A、B 保持静止，且F≠0。则下列描述正确的是（ＡＢ Ｄ） 图5 A ． B 可能受到５个或 4 个力作用 B．斜面对木块B 的摩擦力方向可能沿斜面向下 C．A对B的摩擦力可能为0 D．A、B 整体可能受三个力作用 5、如右图 5 所示，斜面小车M 静止在光滑水平面上，一边紧贴墙壁．若再在斜面上加一物体m，且M 、m 相对静止，小车后来受力个数为（ B ） 图1
A ．3 B ．4 C ．5 D ．6 解读： 对 M 和 m 整体，它们必受到重力和地面支持力．对小车因小车静止，由平衡条件知墙面 对小车必无作用力，以小车为研究对象．如右图所示，它受四个力；重力 M g ，地面的支持力 F N1， m 对它的压力 F N2 和静摩擦力 Ff ，由于 m 静止，可知 F f 和 F N2 的合力必竖直向下，故 B 项正确． 6、如图 6 所示，固定斜面上有一光滑小球， 有一竖直轻弹簧 P 与一平行斜面的轻弹簧 Q 连接着， 小球处于静止状态，则关于小球所受力的个数不可能的是（ A ） A ．1 B ．2 C ．3 D ．4 7、如图 7 所示，在竖直向上的恒力 F 作用下，物体 A 、B 一起向上做匀加速运动。在运动过程 中，物体 A 保持和墙面接触， 物体 B 紧贴在 A 的下表面，A 和 B 相对静止，则下列说法正确的是 （ CD ） A. 竖直墙面对物体 A 有摩擦力的作用 B. 如果物体运动的加速度较小，则物体 C. 物体 B 受到 4 个力作用 D. 因为有向上的加速度，所以 A 、B 处于超重状态，恒力 F 一定大于物体 A 和 B 受到的重力之和 8、如图 8所示，小车 M 在恒力 F 作用下，沿水平地面做直线运动，由此可判断 （ ） A. 若地面光滑，则小车一定受三个力作用 B. 若地面粗糙，则小车可能受三个力作用 C. 若小车做匀速运动，则小车一定受四个力的作用 D. 若小车做加速运动，则小车可能受三个力的作用 【答案】选 C 、D. 【详解】先分析重力和已知力 F ，再分析弹力，由于 F 的竖直分力可能等于重力，因此地面可能 对物体无弹力作用，则 A 错； F 的竖直分力可能小于重力，则一定有地面对物体的弹力存在，若地面粗糙，小车受 摩擦力作用，共四个力作用， B 错；若小车做匀速运动，那么水平方向上所受摩擦力和 F 的水平分力平衡，这时小 车一定受重力、恒力 F 、地面弹力、摩擦力四个力作用，则 C 对；若小车做加速运动，当地面光滑时，小车受重力 和力 F 作用或受重力、力 F 、地面支持力作用，选项 D 正确 . 9、如图 9 所示， 用一根细绳和一根杆组成三角支架， 绳的一端绕在手指上， 杆的一端顶在掌心， 当Ａ处挂上重物时， 绳与杆对手指和手掌均有作用，对这两个作用力的方向判断完全正确的是图中的（ D ） 10、如图 10 所 示， 一倾斜墙面 下有一 质量为 M 的物体 A 受到一竖直向上的推力 F 的作用，处于静止状态，则（ BD ） A. A 可能受到一个力的作用 B. A 可能受到二个力的作用 A 、 B 间可以没有摩擦力作用 B C D 图9 图6 图7 图8 A
初中英语语法易错题
沪江英语＞ /易错题 、名词、冠词 1. -What ca n I do for you? -I'd like two _____ . A. box of apple B. boxes of apples C. box of apples D. boxes of apple 2. Help yourself to ________ . A. some chicke ns B. a chicke n C. some chicke n D. any chicke n 3. _______ it is today! A. What fine weather B. What a fine weather C. How a fine weather D. How fine a weather 4. Which is the way to the _________ ? A. shoe factory B. shoes factory C. shoe's factory D. shoes' factory 5. This class ________ n ow. Miss Gao teaches them. A. are study ing B. is study ing C. be study ing D. study ing 6. We will have a ________ holiday after the exam. A. two month B. two-mo nth C. two mon th's D. two-m on ths 7. __ trees are cut dow n in the forests every year. A. Thousa nd B. Thousa nds C. Thousa nd of D. Thousa nds of 8. Our sports meet ing will be held _______ . A. on 24, Tuesday, April B. in April 24, Tuesday C. on Tuesday, April 24 D. in April Tuesday 24 9. ______ people here are very frien dly to us.
不等式易错题分析
不等式易错题分析 Prepared on 24 November 2020
不等式易错题分析 一、解一元二次不等式的易错题 （一）、随意消项致误 例题1：解不等式; 22(44)(43)0x x x x -+-+≥ 错解：原不等式可化为：2(2)(1)(3)0x x x ---≥ 解得2(2)0,(1)(3)0x x x -≥∴--≥ 所以31x x ≥≤或 原不等式的解集为：{}|31x x x ≥≤或 剖析：错误是由于随意消项造成的，事实上，当2(2)0x -=时，原不等式亦成立 正解：原不等式可化为：20x -≠且(1)(3)0(2)0x x x --≥-=或 解得31x x ≥≤或或x=2 所以原不等式的解集为：{}31x x ≥≤x|或或x=2 （二）、函数不清致误 例题2：已知函数22(45)4(1)3y m m x m x =+-+-+的图像都在x 轴的下方，求实数m 的取值范围。 错解：，依题意，对,0x R y ∈>恒成立，于是函数的图像开口方向向上，且图 像与x 轴无交点。故[]2224504(1)43(45)0 m m m m m ?+->???=--+-
正解：当2450m m +-≠时，同上述解答有119m <<， 若2450m m +-=时，则m=1或m=5 若m=1，,则已知函数化为3y =，则对,0x R y ∈>恒成立； 若m=5，则已知函数化为243y x =+，对,0x R y ∈>不恒成立，故此情形舍去。 所以m 的取值范围为119m ≤< （三）、漏端点致误 例题3：已知集合{}{}2|20,|3A x x x B x a a =--≤=<+，且A B φ=，则实数a 的取值范围是____________ 错解：{}{}2|20|12A x x x x x =--≤=-≤≤ 若使A B φ=，需满足231a a >+<-或，解得24a a ><-或，所以实数a 的取值范围是24a a ><-或。 剖析：上面的解法错误原因在于忽视了集合{}|12A x x =-≤≤的两个端点值-1和2，其实当2a =时{}|25B x x =<<，满足A B φ=；当31a +=-时，即4a =-时也满足A B φ=。 正解：{}{}2|20|12A x x x x x =--≤=-≤≤若使A B φ=，需满足231a a ≥+≤-或，解得24a a ≥≤-或，所以实数a 的取值范围是 24a a ≥≤-或。 (四)、条件非充要致误 例题4：若方程2(2)50x m m +-+-=的两根均大于2，求实数m 的取值范围。 错解：设两根为12,x x ，则有题意可得：1212044x x x x ?≥??+>??>?2(2)(5)02454m m m m ?---≥??->??->?
(完整word)精选受力分析练习题(含答案及详解),推荐文档
精选受力分析练习题15道（含答案及详解） 1．如右图1所示，物体M 在竖直向上的拉力F 作用下静止在斜面上，关于M 受力的个数，下列说法中正确的是（D ） A ．M 一定是受两个力作用 B ．M 一定是受四个力作用 C ．M 可能受三个力作用 D ．M 不是受两个力作用就是受四个力作用 2、如图2所示,物体A 靠在竖直墙面上,在力F 作用下,A 、B 保持静止.物体B 的受力个数为 ( ) A.2 B.3 C.4 D.5 答案 C 解析 B 物体受四个力的作用,即重力、推力F 、物体A 对B 的支持力和物体A 对B 的摩擦力. 3、如图3所示，物体A 、B 、C 叠放在水平桌面上，水平力F 作用于C 物体，使A 、 B 、 C 以共同速度向右匀速运动，那么关于物体受几个力的说法正确的是 （ A ） A ．A 受6个， B 受2个， C 受4个 B ．A 受5个，B 受3个，C 受3个 C ．A 受5个，B 受2个，C 受4个 D ．A 受6个，B 受3个，C 受4个 4、如图4所示，在水平力F 作用下，A 、B 保持静止.若A 与B 的接触面是水平的，且F≠0.则关于B 的受力个数可能为( ) A.3个 B.4个 C.5个 D.6个 解析：对于B 物体，一定受到的力有重力、斜面支持力、A 的压力和A 对B 的摩擦力，若以整体 为研究对象，当F 较大或较小时，斜面对B 有摩擦力，当F 大小适当时，斜面对B 的摩擦力为零，故B 可能受4个力，也可能受5个力.答案：BC 5、如右图5所示，斜面小车M 静止在光滑水平面上，一边紧贴墙壁．若再在斜面上加一物体m ，且M 、m 相对静止，小车后来受力个数为( B ) A ．3 B ．4 C ．5 D ．6 解析： 对M 和m 整体，它们必受到重力和地面支持力．对小车因小车静止，由平衡条件知墙面对小车必无作用力，以小车为研究对象．如右图所示，它受四个力；重力M g ，地面的支持力F N1，m 对它的压力F N2和静摩擦力Ff ，由于m 静止，可知F f 和F N2的合力必竖直向下，故B 项正确． 6、如图6所示，固定斜面上有一光滑小球，有一竖直轻弹簧P 与一平行斜面的轻弹簧Q 连接着， 小球处于静止状态，则关于小球所受力的个数不可能的是 （ A ） A ．1 B ．2 C ．3 D ．4 7、如图7所示，在竖直向上的恒力F 作用下，物体A 、B 一起向上做匀加速运动。在运动过程 中，物体A 保持和墙面接触，物体B 紧贴在A 的下表面，A 和B 相对静止，则下列说法正确的是（ CD ） A.竖直墙面对物体A 有摩擦力的作用 B.如果物体运动的加速度较小，则物体A 、B 间可以没有摩擦力作用 图 1 图 2 图 3 图 4 图 5 图 6 图7
(易错题精选)初中英语语法知识—动词的难题汇编及答案(1)
一、选择题 1．Karen and Helen _______ my brother's friends. I know _______. A．is; her B．are; them C．are; her D．is; them 2．Kay looked _________ at the guests who said that the food she cooked tasted _________. A．happily; wonderfully B．happily; wonderful C．happy; wonderful D．happy; wonderfully 3．These chicken wings taste ________. I want more. A．well B．wonderfully C．nice D．bad 4．I don’t have a baseball, but Alan A．do B．does C．have D．has 5．—David, you got any tea? —Yes. Would you like some? A．have B．do C．has 6．My mother with me ________ at my grandma’s home ________that snowy night. A．were, at B．was, at C．was, on 7．—Let’s _________ the library this afternoon. —Sorry, I want _________ my grandfather. A．go to;to meet B．go to;meeting C．to go to;to meet 8．—How much ________ this pair of shoes? —Five dollars. A．am B．is C．are D．be 9．—William, your hat _______ nice. —Thanks. A．buys B．looks C．finds 10．—When you free last week? — Well, I have a free day because there was too much work. A．did; didn’t B．were; didn’t C．were; wasn’t D．did; wasn’t 11．—He’s never been late for school. —________________. A．So have I B．So am I C．Neither have I D．Nor am I 12．Colours can change our moods and make us happy or sad . A．feel B．to feel C．felt D．feeling 13．This my sister and those my brothers. A．is, is B．are, are C．is, are 14．— Tom in the library? —Yes,and his friends Eric and Dale in the library,too. A．Is;are B．Is;is C．Are;is
小学六年级语文易错题分析
小学六年级语文易错题分析 一、字音 （一）多音字如： ★给多音字注音 树冠（guàn）旋转（zhuàn） 错误原因分析： 想当然的，随意地读 纠错策略及改进措施： 1、查字典明确“冠”和“转”在表示不同意思时的不同读音。 2、学生订正。 3、指出学习不能想当然，鼓励学生纠正身边人的错误读音。 ★给带点字选择正确读音，打上“√”。 树干（gān√gàn） 错误原因分析： 发音不标准，以往对字词的读音不重视。 纠错策略及改进措施： 据义定音，懂得“树干”的意思，选择正确读音。 ★朗读错误：五行（háng） 错误原因分析： 将“五行”的意思理解为“几行” 纠错策略及改进措施： 理解词义：指金、木、水、火、土五种物质；正音五行（xíng） ★朗读错误：憎恶（è） 错误原因分析： 多音字读音不明 纠错策略及改进措施： 1、查工具书了解恶（è）与恶（wù）的意思； 2、改错； 3、举一反三：èwù凶恶（）可恶（）恶（）劣无恶（）不作深恶（）痛绝 （二）习惯误读的字如： ★给下列加点字注音。
渺(miáo) 小 错误原因分析： 平时发音不准 纠错策略及改进措施： 查字典明确正确读音miǎo，反复呈现着读。 ★给带点字注音 亲昵（nī）依偎（wèi ） 错误原因分析： 生活中口语读错。 纠错策略及改进措施： 查字典正音牢记：亲昵（nì）依偎（wēi ） ★“旋涡”的“旋”读成了第四声。 错误原因分析： 生活中口语错误 纠错策略及改进措施： 查词典明确正确读音。 二、字形 （一）形近字如： ★划去不恰当的字 （辨辩）认有的同学选择错误，有的同学做题的要求不对。 错误原因分析： 审题不清，词义不明 纠错策略及改进措施： 1、要求认真审题； 2、复习“辨”与“辩”的意思，认真区别； 3、举一反三：（辨辩）论（辨辩）别争（辨辩）分（辨辩） ★抄写词语：寒暄（寒喧） 错误原因分析： 形近字混淆 纠错策略及改进措施： 明确“暄”在词语中的意思是“温暖”，所以是“日字旁”；订正。
受力分析练习题 (2)
受力分析 例1：画出静止在斜面上的A 物体的受力示意图。（F 垂直于斜面） 例2: 画出下图中光滑斜面上被一挡板挡住的静止钢球的受力示意图。 例3: 在竖直双线悬吊着的斜木梁M 上，放着物体m ，分析斜梁受哪几个力的作用？ 例4: 质量相同的两块砖A 、B 被两木板夹住，试分析 A 、B 的受力情况。 例5：物体A 放在水平传送带上，且A 与传送带保持相对静止，如图所示，若传送带向右匀速运动，试分析A 的受力。 例6．如图所示，倾斜传送带上的物体。 1．分别画出图中A 、B 两物体的受力示意图（A 和B 均静止） 2．如图所示，用力F 将一个木块压在倾斜板 上静止 不动，则木块（ ） A ．有可能只受两个力作用 B ．有可能只受三个力作用 C ．必定受四个力作用 D ．以上说法都不对 3.如图所示，A 、B 、C 三木块叠放在水平桌面上，对B 木块施加一个水平向右恒力F ，三木块共同向右匀速运动，三木块的重力都是G ，分别画出三木块受力示意图。 v v
4.下图中的三个物体正在匀速直线向左运动，那么各接触面的摩擦力大小和方向如何？ 5.如图所示，质量都是m的4块砖被夹在两木板之间静止。求中间两块砖之间的摩擦力。 6：对如图所示的皮带传动装置，下列说法中正确的是：（） A．A轮带动B轮沿逆时针方向旋转 B．B轮带动A轮沿逆时针方向旋转 C．C轮带动D轮沿顺时针方向旋转 D．D轮带动C轮沿顺时针方向旋转 7．如图所示，A、B两物体排放在水平面上，在水平力F的作用下处于静止状态．在以下情况中对B进行受力分析。 （1）B与水平面间无摩擦。 （2）B与水平面间及B．A之间都存在摩擦。 8．如图所示，人重600N，木板重400N，人与木板，木板与地面间动摩擦系数均为0．2，现在，人用一水平恒力拉绳子，使他与木块一起向右匀速运动，则人拉绳子的力及人与木块间的摩擦力分别是多少？
(易错题精选)初中英语语法知识—介词的全集汇编及答案(1)
一、选择题 1．My teacher runs ______ the morning. But he doesn't run ______ Sunday morning. A．in；on B．on；in C．in；in D．on；on 2．North Korea is________Asia. It’s________the northeast of China and________the west of Japan. A．in, to, on B．in, on, to C．on, in, to D．to, on, in 3．Our school plans to have a parents’ meeting_______ the afternoon_______ January 27th. A．in; of B．on; in C．on; of D．in; at 4．—When is your birthday party? —It's________. A．at six,on May 24th B．on six,this Saturday C．in six o'clock this afternoon D．on six,at May 24th 5．She is talented ________ music but I am good at sports. A．at B．in C．on 6．______ Sunday morning my sister usually does her homework, and ______ the afternoon she usually plays tennis. A．On; on B．In; in C．On; in D．In; on 7．If you can’t read the article, it will be meaningless to you. The –less in the word “meaningless” means . A．with B．without C．full of D．out of 8．---What’s your hobby ? ---______collecting balls, I also like different kinds of CDs. A．Besides B．Except C．Beside D．About 9．There is an old bridge __________the river. Be careful (小心) when you ________________ it. A．over; across B．over; cross C．on; cross D．on; across 10．We usually have our school trip _______ a morning of April. A．on B．at C．to D．in 11．My computer game is ______ the drawer and my books are _______ the sofa. A．on; on B．in; in C．on; in D．in; on 12．—There is a hole in the wall. What is it for? —We have a dog. He can get in or out ________ it. A．past B．through C．across D．over 13．–Emma can go out ________ school nights but she must be back ________ ten o’clock. --Oh, I see. A．on, before B．on, after C．in, before D．in, after 14．He has a garden __________ a lot of flowers. A．has B．there is C．with 15．--Which is your teacher? --The one thick(厚厚的)glasses over his eyes is．
高二必修五重点难点——时间、条件和让步状语从句
Section ⅡGrammar 时间、条件和让步状语从句 时间、条件和让步状语从句在高考中约占3分，考查形式主要有单选、完型填空、语篇填空和改错，主要考察这三种从句中的引导词、谓语动词。 幻灯片3 一、时间状语从句 1．no sooner...than与hardly...when 都表示主句与从句的动作相继发生，意为“一……就……，刚刚……就”，主句动词用过去完成时。如no sooner，hardly位于句首时，主句用倒装形式。 He had hardly gone to bed when the doorbell rang. ＝Hardly had he gone to bed when the doorbell rang. 他刚睡下门铃就响了。 No sooner had he got off the train than his daughter ran towards him. 他刚下火车，他女儿就向他跑了过来。 幻灯片4 2．as soon as，the moment，immediately 引导的从句表示从句动作一发生，主句动作随即发生，常译为“一……就”。名词词组the second，the minute，the moment，every time，any time，next time，the first/last time，the day/week/month等亦可作连词，引导时间状语从句。 They told me about it as soon as/immediately/the moment they got the message.他们一听到口信就把消息告诉了我。 Every time he walked by the lake，he thought of his childhood life.每当他走过那个湖时，就会想起童年的生活。 注意：immediately可用做连词也可用做副词。 幻灯片5 3．till和until 词义是“直到……，一直……为止”，表示一个动作持续到某一时刻或某一动作发生为止，在句首只能用until。在肯定句中，主句中要用延续性动词；在否定句中，可以用非延续性动词。 She stood there till/until he had passed out of sight. 她站在那里看着，直到望不见他的身影。 Until they had finished the work，they did not go home. ＝Not until they had finished the work did they go home. 直到工作完成了他们才回家。 幻灯片6 注意：(1)在not...until结构中not until位于句首时主句部分倒装。在强调句中，强调until引导时间状语时，常把not提前，构成It isn’t/wasn’t until...that...。(2)not...until和not...before意思相同，表示“直到……才，在……以前不”。 幻灯片7
典型固定搭配易错题分析复习进程
典型固定搭配易错题 分析
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