中考常见陷阱题
【知识要点】 1 陷阱题的概念
所谓陷阱，就是学生平时解题中容易出错的一些问题，也是学生解题的薄弱环节。目前，陷阱题没有统一的定义。也有这样的观点：陷阱题通常也叫“圈套题”，是指学生在解题时容易“上当受骗”的题目。“陷阱题”与常规题不同，它具有较大的迷惑性，较好的隐蔽性。根据这些观点可以对陷阱题下这样的定义：能矫正学生知识掌握不准确考虑问题不全面的数学习题，称为数学陷阱题。 2 数学陷阱题的分类 a 、性质硬套型陷阱题
这类问题往往很容易一看题目就得到结论，但结论可能不止一个，而忽略其背后所隐含的题意而导致错误答案的出现。 b 、概念干扰型陷阱题
就是题目中没有出现概念性的东西，但解题过程却必须注意题目中隐含的定义来排除答案。学生往往忽略这些隐含条件而多出错误的答案。 c 、思维定势型的陷阱题
思维定势是指人们在长期的思维过程中所形成的一种固定的思维模式。它是一把双刃剑，如果运用得当，它可以帮助考生将考题内容与以前所学知识迅速联系起来，并在短时间内调集解决问题所需的相关知识进行分析、推理，并很快得出正确的结论；但若运用不当，它便会误导考生掉入命题人所预设的陷阱，得出错误的结论。 【历年考卷形势分析及中考预测】
在中考数学命题中，命题者为了考查同学们对所掌握知识的灵活运用情况，常常设置种种“陷阱”。同学们解题时如果审题不严、思考不周全，就会误入陷阱。
陷阱题是历年来中考的必考内容，因题目设计灵活，考察面（主要考察学生基本概念，常见数学思想）广而备受命题者的青睐，从简单的选择填空到较为复杂的中考压轴题甚至竞赛中的压轴题，出题范围极为广泛，对于学生的数学知识综合运用能力考察较多。纵观近6年广州市的中考试题，考点主要集中在考察学生基本概念及分类讨论的数学思想。 【考点精析】
考点1. 因对数学概念的认识模糊而掉入陷阱。 例1.当x =________时，分式
2
22---x x x 的值为零。
例2.方程
11
212=--+x x x 的解为（ ） A ．x =1 B . x =-1 C . x =1或-1 D .无解 【举一反三】 1. .函数1
1
2
-+=
x x y 的自变量x 的取值范围是_______________. 2.方程2)2(2-=-x x x 的解是___________.
3. .若二次根式9a a b +和a b +8是同类二次根式，则ab 的值是____________。
考点2. 因忽略题目的隐含条件而掉入陷阱
例3. 已知关于x 的一元二次方程(k +4)x 2+3x +k 2+3k -4=0的一个根为0，求k 的值。
例4.已知：关于x 的一元二次方程01422
=+++x k kx 有两个不相等的实数根，求k 的
取值范围。
【举一反三】
1.先化简代数式1
24)111(222+--÷--x x x x ，然后再任选一个你喜欢的x 的值代入求值。
2.某等腰三角形的两条边长分别是3cm 和6cm ,则它的周长是（ ） A .9cm B .12cm C .15cm D .12cm 或15cm
3. .若一元二次方程x ax a 240--=的两实数根的和为432a -，则两根之积为（ ）。
A .-4
B .34或-
C .3
D .-34或
4. .已知()()x x x x x x x x x x
-+-=----?? ???÷+-+21201346
32
2
，求的值。
考点3. 因几何图形的形状或位置的多样性而掉入陷阱。
例5.如图，在梯形ABCD中，AD∥BC，∠A=900，AB=7,AD=2,BC=3,问：在线段AB上是否存在点P，使得以P、A、D为顶点的三角形和以P、B、C为顶点的三角形相似？如不存在，请说明理由；若存在，求出PA的长。
例6.在平面直角坐标系中，点A坐标为（1，1），在x轴上是否存在点p，使△AOP为等腰三角形？若存在，请直接写出P点的坐标；若不存在，请说明理由。
【举一反三】
1.相交两圆公共弦长16cm，其半径长分别为10cm和17cm，则两圆圆心距为__________。
2. 园内有一弦，其长度等于园的半径，则这条弦所对的圆周角的度数为_________.
考点4. 因忽略变量的取值范围而掉入陷阱。
例7.如图，在平面直角坐标系中，四边形ABCD 为矩形，点A 、B 的坐标分别为（6，1）、（6，3），C 、D 在y 轴上，点M 从点A 出发，以每秒3个单位的速度沿AD 向终点D 运动，点N 从点C 同时出发，以每秒1个单位的速度沿CB 向终点B 运动，当一个点到达终点时，另一个点也同时停止运动。过点M 作MP ⊥AD ，交BD 于P ，连接NP ，两动点同时运动了t 秒。当运动了t 秒时，△NPB 的面积为S ,求S 与t 的函数关系式，并求S 的最大值。
【举一反三】
1.在△ABC 中，∠B =900，AB =6 cm ，BC =7 cm ，点P 从点A 开始沿AB 边向点B 以1 cm ／s 的速度移动，点Q 从点B 开始沿BC 边向点C 以2 cm ／s 的速度移动。如果点P 、Q 同时从A 、B 两点出发，经过几秒钟后，△PBQ 的面积等于8 cm 2?
考点5. 因思维定势而掉入陷阱。
例8.直角三角形的两条边长分别为6和8，那么这个三角形的外接圆半径等于_________。
【举一反三】
1.若关于x 函数1)3(2
+--=x a ax y 的图像与x 轴有唯一公共点，则a =__________.
考点6. 因审题不细致而掉入陷阱。
例17.某商场销售一批名牌衬衫，平均每天可售出20件，每件盈利40元，如扩大销售量增加盈利，尽快减少库存，商场决定要取适当的降价措施。经调查发现，如果每件衬衫降低1元，商场平均每天可多售出2件。如果商场平均每天要盈利1200元，每件衬衫应降价多少元？
【举一反三】
1. .已知圆O 的半径为R ，则此圆中36°的圆周角所含的弧长是_______________。
常见陷阱题锦集
一、容易漏解的题目
1．一个数的绝对值是5，则这个数是_________；__________数的绝对值是它本身．（5±，非负数）
2．_________的倒数是它本身；_________的立方是它本身．（1±，1±和0）
3．关于x 的不等式40x a -≤的正整数解是1和2；则a 的取值范围是_________．（412a ≤<） 4．不等式组213,.x x a ->??>?
的解集是2x >，则a 的取值范围是_________．（2a ≤）
5．若()
2
211a a a +--=，则a =_________．（2-，2，1-，0）
6．当m 为何值时，函数21(3)45m y m x x +=++-是一个一次函数．（0m =或3m =-） 7．若一个三角形的三边都是方程212320x x -+=的解，则此三角形的周长是_________．（12，24或20）
8．若实数a 、b 满足221a a =+，221b b =+，则a b +=________．（2，2± 9．在平面上任意画四个点，那么这四个点一共可以确定_______条直线．
10．已知线段AB =7cm ，在直线AB 上画线段BC =3cm ，则线段AC =_____．（4cm 或10cm ） 11．一个角的两边和另一个角的两边互相垂直，且其中一个角是另一个角的两倍少30?，求这两个角的度数．（30?，30?或70?，110?）
12．三条直线公路相互交叉成一个三角形，现在要建一个货物中转站，要求它到三条公路的距离相等，则可供选择的地址有_______处？(4)
13．等腰三角形一腰上的高与腰长之比为1:2，则该三角形的顶角为_____．（30?或150?） 14．等腰三角形的腰长为a ，一腰上的高与另一腰的夹角为30?，则此等腰三角形底边上的
高为_______．（
2
a
）
15．矩形ABCD 的对角线交于点O ．一条边长为1，OAB △是正三角形，则这个矩形的周长
为______．（2+2 16．梯形ABCD 中，AD BC ∥，90A ∠=?，AB =7cm ，BC =3cm ，试在AB 边上确定P 的位置，使得以P 、A 、D 为顶点的三角形与以P 、B 、C 为顶点的三角形相似．（AP =1cm ，6cm 或
14
5
cm ）
17．已知线段AB =10cm ，端点A 、B 到直线l 的距离分别为6cm 和4cm ，则符合条件的直线有___条．（3条）
18．过直线l 外的两点A 、B ，且圆心在直线l 的上圆共有_____个．（0个、1个或无数个） 19．在Rt ABC △中，90C ∠=?，3AC =，5AB =，以C 为圆心，以r 为半径的圆，与斜边
AB 只有一个交点，求r 的取值范围．（ 2.4r =或34r <≤）
20．直角坐标系中，已知(1,1)P ，在x 轴上找点A ，使AOP △为等腰三角形，这样的点P 共有多少个？（4个）
21．在同圆中，一条弦所对的圆周角的关系是______________．（相等或互补） 22．圆的半径为5cm ，两条平行弦的长分别为8cm 和6cm ，则两平行弦间的距离为 _______．（1cm 或7cm ）
23．两同心圆半径分别为9和5，一个圆与这两个圆都相切，则这个圆的半径等于多少？（2或7）
24．一个圆和一个半径为5的圆相切，两圆的圆心距为3，则这个圆的半径为多少？（2或8）
25．PA 切⊙O 于点A ，AB 是⊙O 的弦，若⊙O 的半径为1，AB 则PA 的长为____．（1
）
26．PA 、PB 是⊙O 的切线，A 、B 是切点，80APB ∠=?，点C 是上异于A 、B 的任意一
点，那么ACB ∠= ________．（50?或130?）
27．在半径为1的⊙O 中，弦AB AC BAC ∠=________．（75?或15?） 二、容易多解的题
28．已知()()2
2222215x y x y +++=，则22x y +=_______．（3）
29．在函数y =
中，自变量的取值范围为_______．（1x ≥）
30．已知445x x -+=，则22x x -+=________）
31．当m 为何值时，关于x 的方程2(2)(21)0m x m x m ---+=有两个实数根．（1
4
m ≥-，
且2m ≠）．
32．当m 为何值时，函数2
(1)350m m y m x x -=++-=是二次函数．（2） 33．若22022(43)x x x x --=-+，则x =？．（1-）
34．方程组22240,
3260.
x y x xy x y ?-=??-+++=??的实数解的组数是多少？（2）
35．关于x 的方程2210x k ++-=有实数解，求k 的取值范围．（1
13k -≤≤）
36．k 为何值时，关于x 的方程2(2)320x k x k -++-=的两根的平方和为23？（3k =-） 37．m 为何值时，关于x 的方程21202x m x m ?
?-++= ??
?的两根恰好是一个直角三角形的两个
锐角的余弦值？．（m = 38．若对于任何实数x ，分式21
4x x c
++总有意义，则c 的值应满足______．（4c >）
39．在ABC △中，90A ∠=?，作既是轴对称又是中心对称的四边形ADEF ，使D 、E 、F 分别在AB 、BC 、CA 上，这样的四边形能作出多少个？（1）
40．在⊙O 中，弦AB =8cm ，P 为弦AB 上一点，且AP =2cm ，则经过点P 的最短弦长为多
少？()
41．两枚硬币总是保持相接触，其中一个固定，另一个沿其周围滚动，当滚动的硬币沿固定
的硬币滚动一周，回到原来的位置，滚动的那个硬币自转的圈数为_______．（2） 三、容易误判的问题：
1．两条边和其中一组对边上的高对应相等的两个三角形全等。 2．两边及第三边上的高对应相等的两个三角形全等。 3．两角及其对边的和对应相等的两个三角形全等。 4．两边及其一边的对角对应相等的两个三角形全等。
沁园春·雪
北国风光， 千里冰封， 万里雪飘。
望长城内外，惟余莽莽；大河上下，顿失滔滔。
山舞银蛇，原驰蜡象，欲与天公试比高。
须晴日，看红装素裹，分外妖娆。江山如此多娇，引无数英雄竞折腰。惜秦皇汉武，略输文采；唐宗宋祖，稍逊风骚。
一代天骄，成吉思汗，只识弯弓射大雕。
俱往矣，数风流人物，还看今朝。
九年级单项选择专练 C1. --- ____ do you study for a test? --- I study by listening to tapes. A. What B. Which C. How D. Where B2. I _____ really quiet. Now I’m very outgoing. A. use to be B. used to be C. use to D. used to A3. Ann ____ to choose her own clothes, but she isn’t allowed to get her ear pierced穿耳洞yet. A. is allowed B. allow C. allowed D. is allowing D4. ---What ___ you do if you had a million dollars? --- I’d give it to charity. A. will B. did C. were D. Would ①提出将来会发生的事：主句：主语＋would/should/might/could＋动词原形 从句：if+should＋动词原形/were to＋动词原形 eg. If he should go to Harvard University, he would make full use of his time. 如果他要上哈佛大学的话，他就会充分利用他的时间了。 ②提出现在的条件：主句：主语＋would/should/might/could＋动词原形 从句：if+动词过去式 eg. If he studied at this school, he would know the enviornment around the school very much. 如果他在这所学校学习的话，他会很了解周边环境。 ③提出过去的未发生的条件：主句：主语＋would/should/might/could have＋动词过去分词 从句：if+had＋动词过去分词 A5. --- Have you ever ____ another country? ---- Yes, I have. A. been to B. gone to C. be to D. went to B6. --- _____ would you like to go ? --- I’d like to go somewhere warm. A. Which B. where C. What D. How B7. He looks sad. Let’s ____ . A. to cheer him up B. cheer him up C. to cheer up him D. cheer up him C8. ----Jack,you look tired today. What’s wrong?
初中数学中考命题规律及32个陷阱 面对中考，今天给同学们推送一份礼物，让我们看看中 考数学卷中的一些套路——命题老师最爱的32个陷阱，这也是大部分同学容易犯错丢分的知识点，请大家对照这些知 识点将相关内容再过一遍！相信看过这些后，你即将要面对 的中考数学题将不再有“陷阱”，这样的题目就像没了牙齿的老虎。大家要在心理上轻视它，在态度上要重视它！ 一、数学式 陷阱1：在较复杂的运算中，因不注意运算顺序或者不 合理使用运算律，致使运算出现错误。常见陷阱是在实数的 运算中符号层层相扣。 陷阱2：要求随机或者在某个范围内代入求值时，注意 所代值必须要使式子有意义，常见陷阱是候选值里有一个会 使分母为零。 陷阱3：注意分式运算中的通分不要与分式方程计算中 的去分母混淆。 陷阱4：非负数的性质：若几个非负数的和为0，则每个式子都为0；常见非负数有：绝对值，非负数的算术平方根，完全平方式。 陷阱5：五个基本数的混合运算：0指数，基本三角函数，绝对值，负指数，二次根式的化简，这些需牢记。
陷阱6：科学计数法中，精确度和有效数字的概念要清 楚。 二、方程（组）与不等式（组） 陷阱1：运用等式性质解方程时，切记等式两边不能直 接约去含有未知数的公因式，必须要考虑约去的含有未知数 的公因式为零的情形。 陷阱2：常在考查不等式的题目时候埋设关于性质3的陷阱，许多人因忘记改变符号的方向而导致结果出错。 陷阱3：关于一元二次方程中求某参数的取值范围的题 目中，埋设二次项系数包含参数这一陷阱，易忽视二次项系 数不为0导致出错。 陷阱4：解分式方程时，首要步骤是去分母，分数相当 于括号，易忘记最后对根的检验，导致运算结果出错。 陷阱5：关于一元一次不等式组有解无解的条件，易忽 视相等的情况；利用函数图象求不等式的解集和方程的解 时，注意端点处的取值。 三、函数 陷阱1：关于函数自变量的取值范围埋设陷阱。注意： ①分母≠0，二次根式的被开方数≥0，0指数幂的底数≠0； ②实际问题中许多自变量的取值不能为负数。 陷阱2：根据一次函数的性质（或者实际问题、动点问 题等）判断函数的图象出错，一次函数图象性质与k、b之
高考英语陷阱题总结归纳——名词性从句 ◆典型陷阱题分析◆ 1. She was so angry and spoke so fast that none of us understood _______ he said meant. A. that B. what C. that that D. what what 【陷阱】可能误选 B.许多同学一看选项首先就排除了C和D，认为这样两个“引导词”叠 用的情况不太可能。在A和B两个选项中，选项A肯定不行，因为它引导宾语从句时不能 充当句子成分，所以便选择了 B. 【分析】正确答案选 D.第一个what 用作动词meant 的宾语，第二个what 用作动词said 的宾语，即在none of us understood what what he said meant 中，none of us understood 为主 句，what what he said meant 为宾语从句，而在此宾语从句中又包括有what he said 这样一 个主语从句。 2. After _______ had happened he could not continue to work there. A. which B. how C. what D. having 【陷阱】可能误选 A. 【分析】最佳答案选 C.有的同学误选A，是因为认为介词后应接关系代词which，但实 际上，若填关系代词，其前没有先行词，这根据不是一个定语从句。另外，由于had happened 缺主语，所以B和D也不能选。请再做下面一题（答案选B）： He pointed to ______ looked like a tomb and said, “Ghost.” A. that B. what C. which D. as 3.“Is ______ you want to say？” asked the teacher. A. this B. that C. all that D. that all 【陷阱】根据中文字面意思误选A或B. 【分析】最佳答案选 D.假若选A或B，那么转换成陈述句即为：This is you want to say. / That is you want to say. 显然句中的两个谓语动词is与want相冲突。选D组成的句子是Is that all you want to say？其中的that 为句子主语，all 为表语，you want to say 为定语从句， 用以修饰all. ？”“When ______ leave for Japan is kept secret.” 4. “When ______ leave for Japan A. they will, will they B. will they, they will C. they will, they will D. will they, will they 【陷阱】可能误选D，认为when 后应用疑问句词序。 【分析】最佳答案选 B.第一个when引出的是一个特殊疑问句，故用疑问词序；第二个 when 引出的是主语从句，故其后用陈述句词序。请做以下试题（答案选C）：（1）None knows if _______ that boy, but if _______ him, her parents will be disappointed. A. she will marry, she will marry B. she marries, she marries C. she will marry, she marries D. she marries, she will marry （2）“Where _______ go to work？”“Where _______ go to work is not known.” A. we shall, we shall B. shall we, shall we C. shall we, we shall D. we shall, shall we 5. Someone is ringing the doorbell. Go and see ______.
中考英语121个单选陷阱题 ( )1. Mr Li is in his office now. Go and find him. A. maybe B. Maybe C. May be D. May ( )2. Would you like my house for my birthday party? A. come to B. to come over C. coming at D. to come over to ( )3. I like but I don’t like now because I am ill. A. to sing, to sing B. singing, singing C. to sing, singing D. singing, to sing ( )4. I like to keep the windows . It’s raining heavily outside. A. closed B. opened C. open D. closing ( )5. It’s fine. So she the umbrella.
A. needs B. needn’t C. doesn’t need D. need ( )6. It seems that there a heavy rain this afternoon. A. will have B. is going C. is going to D. will be ( )7. ----Will you us about your trip to Tokyo? ----Ok. Shall I it in English or Japanese? A. talk, say B. tell, say C. talk, speak D. tell, speak ( )8. Lily Lucy may go with you because one of them must stay at home. A. Not, but B. Neither, nor C. Both, and D. Either, or ( )9. Lucy, please stop _______ me. My bike is broken. A. helping B. to help C. help D. helps ( )10. They forgot their food and drink. They have nothing to eat now.
中考英语单选各种难题易错题 A. What fine weather B. What a fine weather C. How a fine weather D. How fine a weather 解析：选A. 此题容易误选B. weather是不可数名词，前面不能有不定冠词。英语中经常考查的不可数名词有work, news, adivice, information等。 ( ) 2. Which is the way to the __________? A. shoe factory B. shoes factory C. shoe’s factory D. shoes’ factory 解析：选A. 此题极易误选B, C, D. 英语中名词单数可以修饰名词，如： an apple tree →two apple trees. 但注意 a man teacher→two men teachers。 ( ) 3. This class ________ now. Miss Gao teaches them。 A. are studying B. is studying C. be studying D. studying 解析：选A. 此题容易误选B. class, family, team等单词如果表示整体谓语就用单数，表示个体就用复数，从语境及其后面的代词them可以看出，class表示个体，故选择A。 ( ) 4. We will have a _________ holiday after the exam。 A. two month B. two-month C. two month’s D. two-months 解析：选择B 此题容易误选C, D. 在英语中数词中间用连字符号加名词单数，构成符合名词，在句中只能作定语，如果选择C, 需要把逗号放s后面。 ( ) 5. There is no enough ________ on the corner to put the table。 A. place B. room C. floor D. ground 解析：选B. 此题最容易误选A.。 room在句中是空间而非房间。句意：角落里没有摆桌子的空间了。 ( ) 6. We can have _____ blue sky if we create _____ less polluted world。(苏州2010) A. a; a B. a; the C. the; a D. the; the 解析：选A. 此题容易误选C, D. 根据句意：如果我们创造一个没有污染的世界，那么我们就用一个蓝色的天空。
中考数学解题技巧 1.中考选择题解题八技巧 （1）排除法根据题设和有关知识，排除明显不正确选项，那么剩下惟一的选项，自然就是正确的选项，如果不能立即得到正确的选项，至少可以缩小选择范围，提高解题的准确率。排除法是解选择题的间接方法，也是选择题的常用方法。 （2）数形结合法：解决与图形或图像有关的选择题，常常要运用数学结合的思想方法，有时还要综合运用其他方法。 （3）（特例检验法：取满足条件的特例（特殊值，特殊点，特殊图形，特殊位置等）进行验证即可得正确选项，因为命题对一般情况成立，那么对特殊情况也成立。 （4）代入法：将选择支代入题干或题代入选择支进行检验，然后作出判断。 （5）观察法：观察题干及选择支特点，区别各选择支差异及相互关系作出选择。 （6）枚举法：列举所有可能的情况，然后作出正确的判断。例如，把一张面值10元的人民币换成零钱，现有足够面值为2
元，1元的人民币，换法有（）（A）5种（B）6种（C）8种（D）10种。分析：如果设面值2元的人民币x张，1元的人民币y元，不难列出方程，此方程的非负整数解有6对，故选B. （7）待定系数法：要求某个函数关系式，可先假设待定系数，然后根据题意列出方程（组），通过解方程（组），求得待定系数，从而确定函数关系式，这种方法叫待定系数法。 （8）不完全归纳法：当某个数学问题涉及到相关多乃至无穷多的情形，头绪纷乱很难下手时，行之有效的方法是通过对若干简单情形进行考查，从中找出一般规律，求得问题的解决。该法有一定的局限性，因而不能作为一种严格的论证方法，但它可以帮助我们发现和探求一般问题的规律，从而找到解决问题的途径。 二．选择题的解法技巧： 1、排除法。是根据题设和有关知识，排除明显不正确选项，那么剩下唯一的选项，自然就是正确的选项，如果不能立即得到正确的选项，至少可以缩小选择范围，提高解题的准确率。排除法是解选择题的间接方法，也是选择题的常用方法。 2、特殊值法。即根据题目中的条件，选取某个符合条件的特殊值或作出特殊图形进行计算、推理的方法。用特殊值法解题要注意所选取的值要符合条件，且易于计算。此类问题通常具有一个共性：题干中给出一些一般性的条件，而要求得出某些特定的结论或数值。在解决时可将问题提供的条件特殊化。使之成为具有一般性的特殊图形或问题，而这些特殊图形或问题的答案往往就是原题的答案。利用特殊值法解答问题，不仅可以选用特别的数值代入原题，使原题得以解决而且可以作出符合条件的特殊图形来进行计算或推理。
高考英语典型“陷阱题”50例（含答案解析） 1. Mr Wang made up his mind to devote all he could ______ his oral English before going abroad. A. improve B. to improve C. improving D. to improving 2. Everything he ______ away from him before he returned to his hometown. A. took B. had been taken C. had had been taken D. had taken 3. Before he went abroad，he spent as much time as he _____ English. A. could learning B. learned C. to learn D. could learn 4. You can never imagine what great difficuly I have ______ your house. A. found B. finding C. to find D. for finding 5. The person we spoke to ______ no answer at first. A. making B. makes C. make D. made 6. The person we referred to ______ us a report tomorrow. A. giving B. will give C. gave D. give 7. The days we have been looking forward to _______ soon. A. coming B. will come C. came D. have come 8. The person we talked about ______ our school last week. A. visiting B. will visit C. visited D. has visited 9. The man whose songs we are fond of ______ in our city next week. A. singing B. to sing C. will sing D. sang 10. Not only ______ the jewelry she _____ been sold for her son's gambling debts but also her house. A. is；has B. has；had C. has；has D. 不填；has 11. ______ in thought，he almost ran into the car in front of him. A. Losing B. Having lost C. Lost D. To lose 12. The research is so designed that once nothing can be' done to change it. A. begins B. having begun C. beginning D. begun 13. - What do you think made the woman so upset？ - _______ weight. A. As she put on B. Put on C. Putting on D. Because of putting on 14. Time should be made good use of ______ our lessons well. A. learning B. learned C. to learn D. having learned 15. It was only with the help of the local guide ______. A. was the mountain climber rescued B. then the mountain climber was rescued C. when the mountain climber was rescued D. that the mountain climber was rescued 16. Never ______ time come again. A. has lost B. will lose C. will lost D. lose 17. - ______ was it ______ they discovered the entrance to the underground palace？ - Totally by chance. A. What；that B. How；that C. When；how D. Where；that 18. I have nothing to confess. ______ you want me to say？
中考英语单项选择易错题精选 1.What do you think ______solve the problem ? A .you can do B.can you do C .you can do to D.can you do to 2 .In the past he often made his sister____, but now he is often made ___by his sister. A. to cry; to cry B. cry; cry C .to cry; cry D .cry; to cry 3 .The teacher told us that the sun ____in the east. A .rises B .rose C .raises D .raised 4 .He lives in a village _____there are a lot of trees. A. there B. where C .that D .which 5. He _________ Alice for ten years. A. married to B .has married to C. has married D.has been married to 6 .We need fifteen more people _____our team to do the job. A .but B .except C. as well D .besides 7 .They won`t allow us ________ at this beach. A .swimming B. to swim C .swam D .swim 8 .Is this factory ______you visited last week? A. that B. where C .the one D. in which 9 .The reason ____he was absent from the meeting was ____his car broke down on the way. A .that; because B .why; that C. that; that D. for; that 10 .Is the river_____ through that town very large? A .which flows B. flows C. that flowing D.whose flows 11 .The teacher told me that the students I wanted to see were seen___ football on the playground just now. A .playing B. to be playing C .play D .to play 12. The red rose is the only one _____I real like. A. which B .who C .that D. whom 13 .All the apples _____ fell down were eaten by the pigs. A .those B. which C. what D. that 14 .Don`t forget the day ______you were received into the Youth League. A .when B .that C .at which D .where
初中数学60个命题陷阱+经典易错题集锦数与式 易错点1：有理数、无理数以及实数的有关概念理解错误，相反数、倒数、绝对值的意义概念混淆。以及绝对值与数的分类。每年选择必考。 易错点2：实数的运算要掌握好与实数有关的概念、性质，灵活地运用各种运算律，关键是把好符号关；在较复杂的运算中，不注意运算顺序或者不合理使用运算律，从而使运算出现错误。 易错点3：平方根、算术平方根、立方根的区别。填空题必考。 易错点4：求分式值为零时学生易忽略分母不能为零。 易错点5：分式运算时要注意运算法则和符号的变化。当分式的分子分母是多项式时要先因式分解，
因式分解要分解到不能再分解为止，注意计算方法，不能去分母，把分式化为最简分式。填空题必考。 易错点6：非负数的性质：几个非负数的和为0，每个式子都为0；整体代入法；完全平方式。 易错点7：计算第一题必考。五个基本数的计算：0指数，三角函数，绝对值，负指数，二次根式的化简。 易错点8：科学记数法。精确度，有效数字。这个上海还没有考过，知道就好！ 易错点9：代入求值要使式子有意义。各种数式的计算方法要掌握，一定要注意计算顺序。 方程（组）与不等式（组） 易错点1：各种方程（组）的解法要熟练掌握，方程（组）无解的意义是找不到等式成立的条件。 易错点2：运用等式性质时，两边同除以一个数必须要注意不能为O的情况，还要关注解方程与方程
组的基本思想。（消元降次）主要陷阱是消除了一个带X公因式要回头检验！ 易错点3：运用不等式的性质３时，容易忘记改不变号的方向而导致结果出错。 易错点4：关于一元二次方程的取值范围的题目易忽视二次项系数不为0导致出错。 易错点5：关于一元一次不等式组有解无解的条件易忽视相等的情况。 易错点6：解分式方程时首要步骤去分母，分数相相当于括号，易忘记根检验，导致运算结果出错。 易错点7：不等式（组）的解得问题要先确定解集，确定解集的方法运用数轴。 易错点8：利用函数图象求不等式的解集和方程的解。 函数
高考英语陷阱题总结归纳——连词 ◆典型陷阱题分析◆ 1. I'm sorry, _____ I won't be able to come tonight. A. for B. and C. but D. then 【陷阱】容易误选A，因为空格后的句子是用以说明I'm sorry 的原因的，所以便想当然地认为要选for来表示原因。 【分析】事实上，I'm sorry 后习惯上不接表示原因的连词for，而接表示转折的连词but（也可省略but），用以委婉地提出一个使对方不快的事实。又如： Oh, sorry, but she's out. 哦，不好意思，她出去了。 I'm sorry, but I have to disagree. 对不起，我不敢苟同。 I'm sorry, but I have already had another appointment. 对不起，我已经有约会了。 注：I'm sorry 后虽然不能接表原因的连词for，但却可接介词for.如： I'm sorry for shouting at you. 对不起冲你嚷嚷了。 I am sorry for what I said to you. 我后悔不该对你讲那些话。 2. The point is not who said the words, _____ they are true or not. A. but whether B. and whether C. but how D. and how 【陷阱】几个干扰项均有可能误选。 【分析】最佳答案为A.此题涉及两个搭配：一是not …but …（不是……而是……），二是whether …or not （是否）。请看类例： He was not an actor, who often appeared on stage, _____ a writer, writing stories. A. but B. and C. then D. so 答案选A，主要考查not …but …结构。 3. Just because they make more money than I do, _____ they seem to look down on me. A. so B. and C. but D. 不填 。so …because …直译为……”所以……因为“，将汉语的A但容易误选【陷阱】【分析】此题正确答案为D，但是按英语语法，because 为从属连词，用以引导原因状语从句，它表明整个句子为复合句；而so 在表示“所以”时，它是并列连词，用以连接两个简单句使之成为并列句。由于在同一句中既用了从属连词because，又用了并列连词so，使得该句一半像复合句，一半像并列句，从而导致错误。正确的做法是，任意去掉because 和 so 中的一个，使之要么成为复合句，要么成为并列句。 4. Although he had only entered the contest for fun, _____ he won first prize. A. but B. and C. even D. 不填 【陷阱】容易误选A，将汉语的“虽然……但是……”直译为although …but …。 【分析】正确答案选D.按英语语法，although 为从属连词，用以引导让步状语从句，它表明整个句子为复合句；而but 在表示“但是”时，它是并列连词，用以连接两个简单句使之成为并列句。由于在同一句中既用了从属连词although，又用了并列连词but ，使得该句一半像
中考英语一百道单选陷阱题 1、–Do you know what he did all day?--He spent as much time playing as he ____、 A、 studying B、 was studying C、 studied D、 did studying 2、I can’t say ____ I want to see him again、 We haven’t seen each other for a long time、 A、 how long B、 how soon C、 how often D、 how much 3、 It is said that land animals _____ from sea animals、 A、 were developed B、 developed C、 are developing D、 develops 4、–Would you like some coffee?Yes, and please get me some milk, too、 I prefer coffee _____ milk、
A、 to B、 with C、 than D、 of 5、 ____ made his teacher unhappy、 A、 Tom came late B、Tom’s came late C、Tom’s late D、Tom’s coming late 6、 Father asked Edison ____ 、 A、 what was he doing that for B、 why he was doing that for C、 how he was doing that for D、 what he was doing that for 7、 We are going to have the sports meeting _____ it _____ tomorrow、 A、 if, rains B、 unless, will rain C、 unless, rains D、 when, will rain 8、 _____ of the students in our class _____ from the country、
最新中考英语语法单项选择易错题精选20题 （附解析） 1.____is well-known that Taiwan is part of China. A. It B. That C. What D. As 2.____ is clear to us all, students should obey the school’s rules. A. As B. What C. Which D. It 3.____ is known to all is that China is a developing country. A. What B. As C. Which D. It 4.Mao Zedong was born in Shaoshan, ____ now is a place of interest. A. which B. as C. it D. that 5.He spent as much time as he could ____ the experiment. A. do B. to do C. did D. doing 6.He did what he could ____ his mother do some housework. A. to do B. do C. did D.doing 7.Stay ____ you are. I’ll be back soon. A. in which B. where C. there D.at the place which
8.He came to the second storey window, ____he could see what was happening across the rive. A. from which B. from it C. which D. from where 9.She is alone at home, so she has no one ____she can turn for help. A. whom B. / C. to who D.to whom 10.____advice will you fellow? A. Whose else B.Who’s else C. Who else’s D. Who’s else’s 11.He came to the shop,_____was tightly closed. A. who’s door B. which door C. its door D. the door of which 12.He was praised____what he did. A. because B. be came of C. for the reason D. as 13.The reason ____he was turned down is ____he had no money. A. why;that B. why;because C. that;why D. that;because 14.He found ____honor to be invited to give a talk here. A. that it an B. that an C. it a D. it was an
○典型高考英语陷阱题详解（二）?定语从句 2013年曾梦龙 1. The factory was built in a secret place, around ______ high mountains. A. which was B. it was C. which were D. them were 【陷阱】容易误选A或B，将A、B中的which 和it 误认为是其后句子的主语。 【分析】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 【陷阱】容易误选B，认为around 是介词，选which 用以代替前面的名词hospital，在此用作介词around 的宾语。 【分析】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.
英语中考常见陷阱题集合 ()1.--Whichwouldyoulike,acupofteaoraglassofmil ()6.Ithinkhemustbeintheofficenow,______? A.don’tI B.mustn’the C.isn’the D.can’th
e ()7.---Howmanypeoplewerethereatthemeeting?----_______. ()11.I’llspendasmuchtimeasIcan_____aftertheflo wersinthegarden. A.look B.tolook C.looking D.looked
()12.It’s_______thatwewillneverforget. A.suchanicecity B.asuchnicecity C.asonice city D.soanicecity ( )16.Girlsliketo________themselvesinmoderndres ses. A.dress B.make C.puton
D.wear ()17.–WillyoupleasetellJohntocometomyoffice?--_____. him.MrLiismuchtaller. A.mustn’t B.maynot C.can’t D.needn ’t
()22–Yourdressisverybeautiful,Mary.--____. A.Notatall B.Justso-so. C.No,itisn’t. D.Than kyou orD.Notonly；butalso ()27.Hetoldmethathe_____hereforfiveminutes. A.hascome B.hadarrived C.hadbeen
九年级中考英语单项选择题易错题专练 1. A. Do you know girl in red ? B. Yes, she’s a professor of university. A. the, a B. the ,the C. a, an D. the, an 2.Tonny is honest man and we all like him. A. a B. an C. the D./ 3.We can have bluer sky if we create less polluted world. A.. the, a B. a ,a C. a, an D. the, an 4. of the land in that district covered with trees and grass. A. Two fifths, is B, Two fifth, are C. Two fifth, is D. Two fifths , are 5.Do you know ? Of course. Food is OK to eat if you pick up as soon as possible. A 5-seconds-rule B. 5-second-rule C. 5-seconds-rulesD. 5-seconds rule 6. We will celebrate my pet dog’s birthday. A .two B. second C. The second D the two 7. A. Did you find the small village yesterday ? B. Yes, without any difficulty, for it has changed over the years. A. hardly B. greatly C. clearly D. nearly 8.A. What was weather like yesterday afternoon ? B. It was terrible. It rained . We could go out. A. hard, hard B. hardly, hardly C. hard, hardly D. hardly, hard 9.Thanks to man-made satellites, the world itself is becoming a smaller place. A. more B. most C. much D. much more 10. The we do for the people, the we will be. A. much, happy B. more, happier C. little, happy D. least, happiest 11.Many Chinese students think science subjects are foreign language learning. A. more difficult as B. less difficult than C. much difficult D. so difficult as 12.David jumped in the long jump. He won the game! A. longest B. farthest C. fastest D. highest 13. A. What do you think of the lecture of Li Yang’s Crazy English ? B. I think it’s , but someone think it’s much too . A. wonderful enough, bored B enough wonderful, boring C. wonderful enough, boring D. enough wonderful, bored 14. A. What made you so ? B. The noise upstairs. A. angrily B. angry C. happy D. happily 15.The old woman lives , but she never feels . A. lonely, alone B. alone, lonely C. lonely, lonely D. alone, alone 16. He’s wearing a pair sunglasses to protect his eyes the strong sunlight. A. from B in C. to D. with 17.We can see a full moon the evening of August the 15th every years. A. in B. on C. to D. at 18. Boys and girls , wish you to do well in the English exam a light heart. Good luck to everyone ! A. on B. with C. without D. about 19. I usually go to school bike, sometimes I go to school foot. A. with, on B. on, by C. on, with D. by, on 20.A. Can you speak Chinese or Japanese ? B. I can speak , but I can speak English. A. both B. either C. all D. neither 21. My son wants a pet rabbit for long, but I have no time to buy for him. A. it B. one C. the one D.that 22.The shoes don’t fit me.Would you please show me ? A.the other one B.the others C.another pair D.another one 23. A. Is that dog ? B. No. is white. A. hers, His B. him, His C. he , His D. her, Hers 24. I don’t have to tell you. A. something new B. new something C. anything new D. new anything 25. Maybe the disaster can destroy our homes, but can destroy the love in our people. A. everything B. nothing C. something D. anything 26. Help to some fish, children. A. yourself B. ourselves C. myself D. yourselves 27. A. the soldier are very tired, they keep on working. B. They are great. We must learn from them. A. Because, / B. Though, / C. Because, so D. Though, but 28. A good friend always gives you a helping hand you’re in trouble. A. when B. before C. until D. though 29.I gave you a map you woulfn’t get lost. A.if B.because C.so D.that 30.It is said that we have to put off the camping the bad weather. A.because of B.because C.so D.like 31.We will go for a picnic it doesn’t rain this Sunday.