人教版中考易错题100题(适合于九年级总复习,中考易错题)
中考英语易错题专项训练精选(含答案及解析)
初中中考英语必考易错题含答案解析1、Butter and cheese ______ in priceA.has gone upB.is gone upC.have gone upD.are gone up【解析】黄油和奶酪的价格已经涨了。
用完成时。
黄油和奶酪并列主语,用复数,答案为C。
and 连接的名词作主语,指两个人或物时,谓语动词用复数。
2、 ---He seems _____ ill Shall we take him to the hospital right now? ---I don’t thinkit matters Maybe he’s caught a bit of a coldA. terribleB. terriblyC. evenD. to be terrible【解析】seem+形容词“好像是”ill “病了”用副词修饰。
答案为B. even修饰形容词/副词比较级。
3、---Will you please show me how to operate the new machine? ---Sure It’s a piece of cakeNow let me tell you _____ to do firstA.whatB.howC.whetherD.when【解析】缺do的宾语。
答案为A。
让我告诉你首先做什么。
4、----The pen writes well though it doesn’t cost mu ch ---- Let me have a try So _____A.it isB.it doesC.does itD.is it【解析】的确如此用it代替 pen,write是行为动词,答句用does 答案为B。
5、---Would you like ______ some fruit? ---No thanks I don’t feel like _____ anything nowA.to have,to eatB.having, to eatC. to have , eatingD. having ,eating【解析】would you like to do sth.委婉询问对方的意愿“是否想要做什么....”可以排除B.D .而feel like +名词/动名词,表示“觉得好像....” 答案为C。
初中物理经典易错题100例 通用版中考绝密复习资料
初中物理经典易错题100例-力和运动1.在湖中划船时,使船前进的的动力是()A.桨划水的推力B.水直接对船的推力C.人对船的推力D.水对桨的推力2.踢到空中的足球,受到哪些力的作用( )A受到脚的作用力和重力 B受到重力的作用C只受到脚的作有力 D没有受到任何力的作用3.一辆汽车分别以6米/秒和4米/秒的速度运动时,它的惯性大小:()A.一样大;B.速度为4米/秒时大;C.速度为6米/秒时大;D.无法比较4.站在匀速行驶的汽车里的乘客受到几个力的作用( )A.1个B.2 个C.3个D.4个5.甲、乙两个同学沿相反的方向拉测力计,各用力200牛.则测力计的示数为( )A、100牛B、200牛C、0牛D、400牛6.一物体受到两个力的作用,这两个力三要素完全相同,那么这两个力( )A 一定是平衡力B 一定不是平衡力C 可能是平衡力D 无法判断7.体育课上,小明匀速爬杆小刚匀速爬绳。
有关他们受到的摩擦力下面说法正确的是()A、因为爬杆时手握杆的压力大,所以小明受到的摩擦力一定大B、因为绳子粗糙,所以小刚受到的摩擦力一定大C、小明和小刚受到的摩擦力一定相等D、若小明的体重大,则他受到的摩擦力一定大8.如图所示,物体A在水平力F的作用下,静止在竖直墙壁上.当水平力减小为F/2时,物体A恰好沿竖直墙壁匀速下滑.此时物体A所受摩擦力的大小()A.减小为原来的1/2 B.和原来一样 C.增大为原来的2倍D.无法判断9.蹦极游戏是将一根有弹性的绳子一端系在身上,另一端固定在高处,从高处跳下,a 是弹性绳自然下垂的位置,C点是游戏者所到达的最低点,游戏者从离开跳台到最低点的过程中,物体速度是如何变化的?_______________10.A、B两物体叠放在水平桌面上,在如图所示的三种情况下:①甲图中两物体均处于静止状态;②乙图中水平恒力F作用在B物体上,使A、B一起以2m/s的速度做匀速直线运动;③丙图中水平恒力F作用在B物体上,使A、B一起以20m/s的速度做匀速直线运动。
人教版初中数学九年级数学易错题集全套.doc
九年级数学易错题集1、关于x 的一元二次方程kx 2﹣x+1=0有两个不相等的实数根,则k 的取值范围是 .分析:根据一元二次方程kx 2﹣x+1=0有两个不相等的实数根,得△=b 2﹣4ac >0,然后据此列出关于k 的方程,解方程即可.解答:∵kx 2﹣x+1=0有两个不相等的实数根,∴△=1﹣4k>0,且k ≠0, 解得:k <14且k ≠0. 答案:k <14且k ≠0.考点:根的判别式.2、若二次函数y =x 2+bx 的图像的对称轴是经过点(2,0)且平行于y 轴的直线,则关于x 的方程x 2+bx=5的解为( )A 、120,4x x ==B 、121,5x x ==C 、121,5x x ==-D 、121,5x x =-=分析:二次函数y =x 2+bx 的图像的对称轴是212b bx =-=-⨯,解答: ∵对称轴过点(2,0),∴22b-=,即4b =-, 将4b =-值代入方程,得:245x x -=,()()510x x -+=,∴11x =-,25x =答案:D考点:二次函数对称轴;二元一次方程的解。
3、如图,在平面直角坐标系xOy 中,△由△绕点P 旋转得到,则点P 的坐标为( )A .( 0, 1)B .( 1, -1)C .( 0, -1)D .( 1, 0)分析:根据格结构,找出对应点连线的垂直平分线的交点即为旋转中心.解答:由图形可知:对应点的连线CC′、AA′的垂直平分线过点(0,-1),根据旋转变换的性质,点(1,-1)即为旋转中心.故旋转中心坐标是P(1,-1)答案:B.考点:坐标与图形变化—旋转.4、下列图形中,是轴对称图形但不是中心对称图形的是()A、直角三角形B、正三角形C、平行四边形D、正六边形分析:中心对称图形绕某一点旋转180°,旋转后的图形能够与原来的图形重合;轴对称图形被一条直线分割成的两部分沿着对称轴折叠时,互相重合;据此判断出是轴对称图形,但不是中心对称图形的是哪个即可.解答:∵选项A中的图形旋转180°后不能与原图形重合,∴此图形不是中心对称图形,也不是轴对称图形,∴选项A不正确;∵选项B中的图形旋转180°后不能与原图形重合,∴此图形不是中心对称图形,但它是轴对称图形,∴选项B正确;∵选项C中的图形旋转180°后能与原图形重合,∴此图形是中心对称图形,但它不是轴对称图形,∴选项C不正确;∵选项D中的图形旋转180°后能与原图形重合,∴此图形是中心对称图形,它也是轴对称图形,∴选项D不正确.答案:B.考点:中心对称图形;轴对称图形.点评:(1)此题主要考查了中心对称图形问题,要熟练掌握,解答此题的关键是要明确:把一个图形绕某一点旋转180°,如果旋转后的图形能够与原来的图形重合,那么这个图形就叫做中心对称图形,这个点叫做对称中心.(2)此题还考查了轴对称图形,要熟练掌握,解答此题的关键是要明确:轴对称图形是针对一个图形而言,是一种具有特殊性质图形,被一条直线分割成的两部分沿着对称轴折叠时,互相重合;轴对称图形的对称轴可以是一条,也可以是多条甚至无数条.5、如图,用一个半径为30cm ,面积为π300cm 2的扇形铁皮,制作一个无底的圆锥(不计损耗),则圆锥的底面半径r 为( )A 、5cmB 、10cmC 、20cmD 、π5cm分析:∵扇形的半径为30cm ,面积为π300cm 2,∴扇形的圆心角为230036012030ππ⋅=︒⋅.∴扇形的弧长为()1203020180cm ππ⋅⋅=.∵圆锥底面周长等于它的侧面展开图的弧长,∴根据圆的周长公式,得220r ππ=, 解得()10r cm =.∴圆锥的底面半径为10cm .答案:B .考点:圆锥的计算.6、如图,四边形ABCD 是⊙O 的内接四边形,⊙O 的半径为2,∠B =135°,则的长为( )A . π2B . πC . 2π D . 3π分析:连接OA 、OC ,然后根据圆周角定理求得∠AOC 的度数,最后根据弧长公式求解.解答:连接OA 、OC ,∵∠B =135°,∴∠D =180°﹣135°=45°,∴∠AOC =90°, 则的长==π.答案:B .考点:弧长计算;圆周角定理;圆内接四边形性质. 点评:本题考查了弧长的计算以及圆周角定理,解答本题的关键是掌握弧长公式L =180Rn .7、下列说法正确的是( )A 、掷一枚均匀的骰子,骰子停止转动后,6点朝上是必然事件B 、甲、乙两人在相同条件下各射击10次,他们的成绩平均数相同,方差分别是S 甲2=0.4,S 乙2=0.6,则甲的射击成绩较稳定C 、“明天降雨的概率为”,表示明天半天都在降雨D 、了解一批电视机的使用寿命,适合用普查的方式 分析:利用事件的分类、普查和抽样调查的特点、概率的意义以及方差的性质即可作出判断.解答: 解:A 、掷一枚均匀的骰子,骰子停止转动后,6点朝上是可能事件,此选项错误;B 、甲、乙两人在相同条件下各射击10次,他们的成绩平均数相同,方差分别是S 甲2=0.4,S 乙2=0.6,则甲的射击成绩较稳定,此选项正确;C、“明天降雨的概率为”,表示明天有可能降雨,此选项错误;D、解一批电视机的使用寿命,适合用抽查的方式,此选项错误;答案:B.点评:本题主要考查了方差、全面调查与抽样调查、随机事件以及概率的意义等知识,解答本题的关键是熟练掌握方差性质、概率的意义以及抽样调查与普查的特点,此题难度不大.考点:方差;全面调查与抽样调查;随机事件;概率的意义.8、一个布袋内只装有1个黑球和2个白球,这些球除颜色外其余都相同,随机摸出一个球后放回搅匀,再随机摸出一个球,则两次摸出的球都是黑球的概率是( )A、B、C、D、分析:列表分如下:黑 白1 白2黑 (黑,黑) (白1,黑) (白2,黑) 白1 (黑,白1) (白1,白1) (白2,白1) 白2(黑,白2) (白1,白2) (白2,白2) 由表知,随机摸出一个球后放回搅匀,再随机摸出一个球所以的结果有9种,两次摸出的球都是黑球的结果有1种,∴两次摸出的球都是黑球的概率是. 答案:D .考点:用列表法求概率.9、如图,正比例函数x k y 11=的图像与反比例函数xk y 22=的图象相交于A 、B 两点,其中点A 的横坐标为2,当21y y >时,x 的取值范围是( ).A 、22>或<x x -B 、202<<或<x x -C 、2002<<或<<x x -D 、202>或<<x x -分析:根据函数的交点可得点B的横坐标为-2,根据图象可得当一次函数的函数值大于反比例函数的函数值时x>2或-2<x<0.答案:D考点:反比例函数与一次函数.10、如图,在四边形ABCD中,DC∥AB,CB⊥AB,AB=AD,CD=AB,点E、F分别为AB、AD的中点,则△AEF与多边形BCDFE的面积之比为()A.B.C.D.分析:根据三角形的中位线求出EF=BD,EF∥BD,推出△AEF∽△ABD,得出=,求出==,即可求出△AEF与多边形BCDFE的面积之比.解答:连接BD,∵F、E分别为AD、AB中点,∴EF=BD,EF∥BD,∴△AEF∽△ABD,∴==,∴△AEF的面积:四边形EFDB的面积=1:3,∵CD=AB,CB⊥DC,AB∥CD,∴==,∴△AEF与多边形BCDFE面积之比为:1:(3+2)=1:5 答案:C.考点:相似三角形的判定与性质;三角形的面积;三角形中位线定理.专题:压轴题.点评:本题考查了三角形的面积,三角形的中位线等知识点的应用,主要考查学生运用性质进行推理和计算的能力,题目比较典型,难度适中.11、如图,在直角坐标系中,有两点A (6,3)、B (6,0).以原点O 为位似中心,相似比为31,在第一象限内把线段AB 缩小后得到线段CD ,则点C 的坐标为( )A .(2,1)B .(2,0)C .(3,3)D .(3,1)解析:∵线段CD 和线段AB 关于原点位似,∴△ODC ∽△OBA ,∴31OB ==AB CD OD , 即3136==CD OD ,∴CD =1,OD =2,∴C (2,1). 另解:设C (x ,y ),∵线段CD 和线段AB 关于原点位似, ∴3136==y x ,∴x =2,y =1,∴C (2,1).点评:每对对应点的连线所在的直线都相交于一点的相似图形叫做位似图形.位似图形对应点到位似中心的距离比等于位似比(相似比);在平面直角坐标系中,如果位似图形是以原点为位似中心,那么位似图形对应点的坐标比等于相似比.12、若锐角α满足cosα<且tanα<,则α的范围是()A.30°<α<45°B.45°<α<60°C.60°<α<90°D.30°<α<60°分析:先由特殊角的三角函数值及余弦函数随锐角的增大而减小,得:45°<α<90°;再由特殊角的三角函数值及正切函数随锐角的增大而增大,得出:0<α<60°;从而得出45°<α<60°.解答:∵α是锐角,∴cosα>0,∵cosα<,∴0<cosα<,又∵cos90°=0,cos45°=,∴45°<α<90°;∵α是锐角,∴tanα>0,∵tanα<,∴0<tanα<,又∵tan0°=0,tan60°=,0<α<60°;故45°<α<60°.答案:B.考点:锐角三角函数的增减性.专题:应用题.点评:本题主要考查了余弦函数、正切函数的增减性与特殊角的余弦函数、正切函数值,熟记特殊角的三角函数值和了解锐角三角函数的增减性是解题的关键.13、如图,要在宽为22米的九州大道两边安装路灯,路灯的灯臂CD长2米,且与灯柱BC成120°角,路灯采用圆锥形灯罩,灯罩的轴线DO与灯臂CD垂直,当灯罩的轴线DO 通过公路路面的中心线时照明效果最佳,此时,路灯的灯柱BC高度应该设计为()A.(11﹣2)米B.(11﹣2)米C.(11﹣2)米D.(11﹣4)米分析:出现有直角的四边形时,应构造相应的直角三角形,利用相似求得PB、PC,再相减即可求得BC长.解答:如图,延长OD,BC交于点P.∵∠ODC=∠B=90°,∠P=30°,OB=11米,CD=2米,∴在直角△CPD中,DP=DC•cot30°=2m,PC=CD÷(sin30°)=4米,∵∠P=∠P,∠PDC=∠B=90°,∴△PDC∽△PBO,∴=,∴PB===11米,∴BC=PB﹣PC=(11﹣4)米.答案:D.考点:解直角三角形的应用.点评:本题通过构造相似三角形,综合考查了相似三角形的性质,直角三角形的性质,锐角三角函数的概念.14、一个几何体的三视图如图,则这个几何体是()A.三棱锥 B.三棱柱 C.圆柱D.长方体分析:根据三视图的知识,正视图为两个矩形,侧视图为一个矩形,俯视图为一个三角形,故这个几何体为直三棱柱.解答:根据图中三视图的形状,符合条件的只有直三棱柱,因此这个几何体的名称是直三棱柱.答案:B.考点:由三视图判断几何体.点评:本题考查由三视图确定几何体的形状,主要考查学生空间想象能力及对立体图形的认识.15、下列说法不正确的是()A.圆锥的俯视图是圆B.对角线互相垂直平分的四边形是菱形C.任意一个等腰三角形是钝角三角形D.周长相等的正方形、长方形、圆,这三个几何图形中,圆面积最大分析:根据三视图、菱形的判定定理、等腰三角形的性质、正方形的性质、即可解答.解答: A、圆锥的俯视图是圆,正确;B、对角线互相垂直平分的四边形是菱形,正确;C 、任意一个等腰三角形是钝角三角形,错误;例如,顶角为80°的等腰三角形,它的两个底角分别为50°,50°,为锐角三角形; D 、周长相等的正方形、长方形、圆,这三个几何图形中,圆面积最大,正确;答案:C .考点:命题与定理. 点评:本题考查命题、定理,解题的关键是熟记三视图、菱形判定定理、等腰三角形性质、正方形的性质.16、抛掷一枚质地均匀的硬币,如果连续抛掷 1 000 次,那么第 999 次出现正面朝上的概率是( )A 、9991B 、10001C 、1000999D 、21 分析:没有正确理解等可能事件的概率. 此题只需考虑第999 次出现的结果,有两种结果,第 999 次出现正面朝上只有一种结果,即可求解 .答案:D17、游园晚会上有一个闯关活动:将5 张分别画有等腰梯形、圆、平行四边形、等腰三角形、菱形的卡片任意摆放,将有图形的一面朝下,从中任意翻开一张,若翻开的图形是轴对称图形,就可以过关,则一次过关的概率是( )A 、51B 、52C 、53D 、54分析:容易因为不能准确判断轴对称图形,算错概率.答案:D18、在一幅长为 80 cm,宽为 50 cm 的矩形风景画的四周镶一条相同的金色纸边,制成一幅矩形挂图,如图,如果要使整个挂图的面积是 5400 cm2,设金色纸边的宽为x cm,那么x 满足的方程是()A.x2+130x-1 400=0B.x2+65x-350=0C.x2-130x-1 400=0D. x2-65x-350=0解析:观察图形可知,金色纸边的面积与矩形风景画的面积之和为 5 400 cm2,而矩形风景画的面积为 4 000cm2,设金色纸边的宽为x cm,则可用含x 的代数式表示出金色纸边的面积为[4x2+2(80x+50x)]cm2.答案:B点评:从同学们所熟知的生活情景入手,考查同学们建立方程模型的能力,使考查的过程具有一定的趣味性,同时,建模的思想作为初中数学的重点和难点是需要师生在学习过程中有针对性突破的,而中考的命题毫无疑问在这方面给出了一种明显的导向,应当引起重视.19、已知:△ABC中,点E是AB边的中点,点F在AC边上,若以A,E,F为顶点的三角形与△ABC相似,则需要增加的一个条件是.(写出一个即可)分析:根据相似三角形对应边成比例或相似三角形的对应角相等进行解答;由于没有确定三角形相似的对应角,故应分类讨论.解答:分两种情况:①∵△AEF∽△ABC,∴AE:AB=AF:AC,即1:2=AF:AC,∴AF=AC;②∵△AFE∽△ACB,∴∠AFE=∠AB C.∴要使以A、E、F为顶点的三角形与△ABC相似,则AF=AC或∠AFE=∠AB C.答案:AF=AC或∠AFE=∠AB C.考点:相似三角形的判定.专题:开放型.点评:本题很简单,考查了相似三角形的性质,在解答此类题目时要找出对应的角和边.20、已知:m ,n 为两圆的半径(m ≠n ),d 是两圆的圆心距,且方程 2x -2mx +2n =d (n -m )有两个相等的实数根,求证:这两个圆相外切.证明:∵2x -2mx +2n =d (n -m )有两个相等的实数根,∴整理该方程,得:2x -2mx +2n +(m -n )d =0, ∴2b -4ac =2)2(m -4×1×[2n +(m -n )d ] =42m -42n -4(m -n )d =0.即 4(m -n )(m +n -d )=0.又∵m ≠n ,即 m -n ≠0,∴m +n -d =0,即 d =m +n .∴两圆相外切.点评:证明两个圆相外切,就是证明两圆圆心距等于两圆半径之和,即 d =m +n ,根据题意可由 b 2-4ac =0 来证明d =m +n .。
中考经典易错题型,九年级化学常见易错题汇总含答案,初中化学经典易错点归纳及练习
中考经典易错题型,九年级化学常见易错题汇总含答案,初中化学经典易错点归纳及练习易错题1、正确选项为D。
磷在空气中燃烧会产生大量白烟,其他选项描述都正确。
易错题2、正确选项为B。
红磷可以与氧气反应生成五氧化二磷,从而除去氧气。
易错题3、该图说明水分子中的氢、氧原子可以再分。
易错题4、正确选项为C。
在氧气流中加热混合物可以使混合物中的炭粉燃烧,从而提纯氧化铜。
易错题5、错误选项为D。
钢虽然是由生铁炼制而成,但是钢同样会生锈。
易错题6、正确选项为D。
铝可以与盐酸发生置换反应生成三氯化铝。
易错题7、正确选项为C。
不溶物可能含有Cu,但不一定含有Fe,溶液中可能含有FeSO4,但不一定含有CuSO4.易错题8、正确选项为B。
溶液是一种混合物,由溶质和溶剂组成。
易错题9、正确选项为A。
31.6 g硝酸钾可以在水中溶解,但不一定是在100 g水中。
易错题10、溶液中溶质的质量分数不变的情况是温度不变,溶解度不变,即在30℃下继续饱和溶解。
A。
在温度不变的条件下,向溶液中加入氯化钾晶体。
B。
在温度不变的条件下,向溶液中加入水。
C。
降低温度至10℃。
D。
在保持温度在40℃的情况下,升高温度蒸发掉一部分水。
2.改写后:A。
碱不一定含有氧元素,盐也不一定含有氧元素。
B。
酸、碱、盐都不一定含有氧元素。
C。
酸一定含有氢元素,盐一定不含有氢元素。
D。
盐一定含有金属元素,酸一定不含有金属元素。
3.改写后:A。
pH值为7的溶液是中性溶液。
B。
凡是生成盐和水的反应都是中和反应。
C。
在测定溶液酸碱度时,可以将pH试纸浸入溶液中。
D。
若某溶液的pH值为10,滴入酚酞溶液时,会使溶液呈现红色。
4.改写后:在硝酸银和硝酸铜的混合溶液中加入一定量的铁粉,充分反应后,发现有金属析出。
过滤后滤液呈浅绿色,向滤液中滴加盐酸,会生成白色沉淀。
因此,析出的金属是Ag和Cu。
5.改写后:为了除去稀硝酸中混有的少量硫酸,可以加入Ba(NO3)2溶液,发生的化学方程式为Ba(NO3)2 + H2SO4 → BaSO4↓ + 2HNO3.为了除去氯化钠溶液中混有的少量盐酸,可以加入Ba(OH)2溶液,发生的化学方程式为2NaCl + Ba(OH)2 →2NaOH + BaCl2↓,该反应的类型是双离子交换反应。
中考易错题1
易错题1、如果等腰▲的一边长为8,另一边长为10,那么连结这个三角形各边的中点所成的三角形的周长为()2、已知直角▲的两条边长恰是方程x2-7x+12=0的两根,则该直角▲斜边长为()3、如果两个圆的半径分别为5cm和3cm,公共弦为6cm,那么这两个圆的圆心距是()4、⊙O的半径为5cm,弦AB∥CD,AB=6cm,CD=8cm,则AB和CD的距离为()5、已知⊙O的直径AB为13cm,C为圆上一点,CD⊥AB,垂足为D,且CD=6cm,则AD的长为()6、已知AB和CD为⊙O的两条直径,弦CE∥AB,弧EC的度数为400,则∠BOD的度数为()7、⊙O的一条弦AB把圆分为度数比为1:5的两条弧,C为圆上异于A、B的任一点,则∠ACB的度数为()8、已知一弓形的弦长为8cm,该弓形所在的圆的半径为5cm,则此弓形的高为()9、一个矩形纸片两边长分别为8cm、10cm,用它做一个圆柱的侧面,所得的圆柱的表面积是()10、如果一个直角▲两条直角边长分别为3cm和4cm,以它的一边所在的直线为轴旋转一周,得到一个几何体,则这个几何体的表面积为()11、矩形一个角的平分线为矩形一边为1cm和3cm两部分,则这个矩形的面积为()12、在半径为1的⊙O中,弦AB、AC分别是则∠BAC度数为( ).13、已知⊙O的直径为6cm,如果直线L上的一点C到圆心O的距离为3cm,则直线L与⊙O的位置关系是()14、已知▲ABC中,∠C=900,AC=3,BC=4,分别以A、C为圆心作⊙A、⊙C,且⊙C与直线AB不相交,⊙A与⊙C相切,设⊙A的半径为r,那么r的取值范围是()15、已知AB是⊙O的直径,CD是弦,AB=10cm,点A、B到直线CD的距离分别为1cm和7cm,则弦CD的长为()16、一个已知点到圆周上的点的最大距离为5cm,最小距离为1cm,则此圆的半径为()17、分式2231x xx+--的值为0,则x的取值为()18、AD为▲ABC的高,AD=1,BD=1,CD=ABC的面积为()19、为美化环境,计划在某小区内用30平方米的草皮铺设一块边长为10米的等腰三角形绿地,则这个等腰三角形绿地的另两边长分别为()20、方程 ,则 ( )21、当五个正整数从小到大排列后,其中位数为4。
人教版英语九年级全册期末易错题整理(含答案)
人教版新目标九年级英语易错题整理一.用所给单词的正确形式填空1.Tom has a _____(train) dog ,It can do wonderful tricks.2.The crowd fell _____(silence)when the president appeared.3.The festival that we looked forward to ______(come) at last.4.Tom tried his best to study chemistry and he finally ______(success).5.You can’t imagine what difficulty I had_____(speak) in front of so many people.6.Tom came into the room,_______(sing) pop song.7.I’m glad to receive your _______(i nvite) to the birthday party.8.We’re still only halfway to _____(solve) the problem.st Sunday I saw an______(pleasure)thing in the park--rubbish was everywhere。
10.My parents take pride in my _______(achieve)11.It was midnight,but Tom still stayed _______(wak e) and couldn’t go to sleep.12.It’s ________(believe) that he can finish the task so quickly.13.______(luck),he got better before the important competition.14.The man was out of breath after he climbed to the ______(forty) floor.15.His uncle is blind in both eyes. He is _____(able) to see things.16.Today, the ________(popular) of basketball has risen around the world.17.The plane landed in Tokyo______(safe) after flying in the rainstorm.18.They did the experiment _________(different)19.The boy is ________(honest),so no one likes him.20.How can you make yourself__(understand) if you can not express yourself clearly?21._______(pollute) water is a great danger to people’s health.22.Fallen trees,________(broke)windows and rubbish were everywhere.23.Vaccine(疫苗) must be one of the most important _____(invent) in human beings.24.Jim was a lucky dog today as he was_______(mistake ) for the superstar.25.I’m so tired today that I can’t walk __________(far) than before.26.With all of these new _____(discover),we should be proud of the young scientists .27.Here’s a list of the most famous_________(sing)names.28.The information was _______(use) and they lost their match.29.The road to ________(succeed) is to work honestly.30.The pair of shoes _______(fit) you but those shoes are too small.31.More and more people in China are _____(use) Tik Tok(抖音).32.Jacky Chan is one of the most successful ______(act) in the world.33.My ______(speak)English is very poor , I need more practice.34.The story _____(it) is very interesting.35.At last he became a _________(succeed) businessman.36.He went abroad to do ________(far) study.37.He had an ______(argue) with his parents last weekend.38.December is the _______(twelve) month of the year.39.He ordered a bowl of _______(tomato) soup.40.I had something ______(value) in my schoolbag .I ca n’t lose it.二.单项选择( )1.We should do what we can _______English.A.to practice to speakB. to practice speakingC.practice speaking( )2._____food you have cooked ! Could I have a taste?A.What niceB.How niceC.What bad( )3.--Do you know if _____next Monday?---No . I Will call you if he ____back.A.will he come; comesB.he comes; will comeC.he will come;comes( )4.I discover that listening to ______is the secret ______language learning .A.something interesting;toB.interesting something;toC.something interested;of ( )5.—Do you know if _____next Monday?_No, I will call you if he _____back.A.will he come;comesB.he comes; will comeC.he will come comes( )6.I don’t know______he will live here in many years.A.whetherB.whereC.what( )7.---What did the teacher say ?—He said that light ______faster than sound.A.traveledB.travelsC.has traveled( )8.Does your friend want to go to ______European country or ___Asian country?A.a; anB.an ; anC.a ;a( )9.I had trouble _____complete sentences in learning English.A.makesB.to makingC.making( )10.The old man _____for 10 years.A.diedB.dyingC.has been dead( )11.The _____news made us very _________.A.exciting;excitingB.exciting; excitedC.excited ;exciting( )12.Have you ever read books _______by Lu Xun?A.writingB.writtenC.are written( )13.Edison was a great ______.He ______over 1,000________during his life.A.invent; invented; inventionsB.inventor; invented; inventionC.inventor; invented ; inventions( )14.---I saw Lucy go to Miss Zhang’s home just now.---Yes,she is often seen ___Miss Zhang with her housework.A.helpB.helpsC.to help( )15.If your homework _______,you can play soccer with your classmates.A.finishesB.will finishC.is finished( )16.Joe was made _____in front of the whole class.A.danceB.dancedC.to dance( )17.I like music very much. Nothing can prevent me _____the music club.A.to joinB.joinC.joining( )18.--Why don’t you go to work by car?--There is something wrong with it. I can’t get it _____.A.to startB.startingC.started( )19.I will help you look after your pet cat .You ____ worry about it.A.don’t needB.don’t need toC.needn’t to( )20.The news he told us ____be true because he is an honest boy.A.canB.wouldC.must( )21.---Excuse me,do you know _____this mobile belongs to?----Let me see. Oh,it’s ______.A.who; meB.whose; meC.who ; mine( )22.Tom has some friends who___Moon Reflected on Second Spring very much.A.enjoyB.enjoysC.enjoyed( )23.Listening to soft music can make you ______.A.relaxingB.to feel relaxingC.feel relaxed( )24.It’s worth ___the time to learn about the ___of a country before you go there.A.spending ;customsB.to spend ;customers.C.spending ; habits( )25.The sweet smell of the flowers in garden comes in _____the open window, making us feel good.A.throughB.acrossC.that( )26.Mrs.White asks us to remember that __care we are,____mistakes we will make. A.the A.more ;the fewer B.the more ; the more C.the less; the fewer( )27.______hot weather it is today !A.How B What C.What a( )28.Alice with her classmates _____a lot of new knowledge during the study tripA.Every year. A.learnsB.learnC.has learned( )29.______he like soccer , _____I like soccer.A.Not only does: but alsoB.Not only ;but alsoC.Not only ; but also( )30.How do people here drink tea?Most of us usually drink tea that _____with milk or sugar.A.servedB.wasn’t servedC.isn’t served( )31.It’s very nice_____pictures for me.A,of you to draw B.for you to draw C.of you drawing( )32.Tom prefers______to_______.Let’s ask him to join our dancing club.A.singing; dancingB.dancing ;singingC.to singing dance( )33. A library with five thousand books _____to the nation as a gift.A.is offeredB.has offeredC.are offered( )34.Two hundred pounds ______a big sum of money for the poor family.A.seemB.seemsC. will seem( )35.The dress ______smooth and soft .A.is feelingB.feelsC.is felt( )36.Do you know that Fujian is ______the west of Taiwan?A.to B in C.on( )37.About______of the workers in the factory were born in the _____.A.three fifths; 1970B.three fifths; 1970sC.three fifth ;1970s( )38.( )38.Lisa is _____a love girl _____we all love her.A.so; thatB.such; thatC.enough; to( )39.They were talking about the people and things______ they remembered when I came into the room.A.whichB.thatC.who( )40.Jack is one of the boys_______basketball very well.A.whom playB.who playsC.who play参考答案一.用所给单词的正确形式填空1 training2 silent3 came4 succeeded5 speaking6 singing7 invitation8 solve9 pleasant 10 achievement 11 awake12believed 13Luckily 14fortieth 15unable 16 popularity17safely 18 differently 19unhonest 20to be understood 21Pollution 22 broken 23 inventions 24mistaken25farther 26discovery 27singers` 28 useless 29 success 30 fits 31using 32actors 33 spoken 34itself 35successful 36futther 37argument 38 twelfth 39 tomato 40 valuable二、单项选择1-5:BACAC 6-10:ABACC11-15:BBCCC 16-20:CCCBC21-25:CACAA 26-30:ABAAC31-35:AAABB 36-40:ABBBB。
人教版九年级物理年中考专题复习—易错题集锦.doc
乙 图3 甲 图 5 R 1 R 2 A 1 A 2 图7 A V 1 V 2R R ' 图10 R S L 1 图9 A 1 A 2 V P 2010年中考物理专题复习——易错题集锦一、选择题: 1、如图1所示,杠杆处于平衡状态,力F 1的力臂是( ) A 、OD B 、OC C 、OB D 、OA2、如图2所示,在轻质杠杆的B 处挂一重物G,O 为支点,在A 端用力使杠杆在水平方向上平衡,则此杠杆( )A 、一定是省力杠杆B 、一定是费力杠杆C 、一定是等臂杠杆D 、以上都有可能 3、小刚用50N 的力将重30N 的铅球推到7m 远处,那么小刚对铅球做的功是( )A 、350JB 、210JC 、0D 、条件不足,无法计算4、下列说法中,正确的是( )A 、机械的功率越大,做功越多B 、机械的功率越大,机械的机械效率越高C 、机械的机械效率越高,机械越省力D 、机械的功率越小,做功越慢5、如图3所示,小明分别用甲、乙两个滑轮把同一袋沙子从地面提到二楼,用甲滑轮所做的总功为W 1,机械效率为η1;用乙滑轮 所做的总功为W 2,机械效率为η2。
若不计绳重与摩擦,则( )A 、W 1 = W 2,η1=η2B 、W 1 = W 2,η1<η2C 、W 1 < W 2,η1>η2D 、W 1 > W 2,η1>η26、一个开关控制两盏灯,它们同时亮同时灭,那么它们( )A 、一定是并联的B 、一定是串联的C 、可能是并联的D 、以上都不对7、教室中的两只日光灯由一个开关控制,同时亮同时灭,那么它们( )A 、一定是并联的B 、一定是串联的C 、可能是并联的D 、可能是串联的8、在图4中,若闭合开关S,则( )A 、L 1、L 2都被烧坏B 、L 1,L 2不亮C 、电压表被烧坏D 、电流表被烧坏9、某电阻,当它的两端的电压为4V 时,通过的电流是0.2A,当它的两端电压为2V 时,阻值为( )A 、10ΩB 、 20ΩC 、30ΩD 、40Ω10、在图5中,闭合开关后发现A 1、A 2的指针偏转角度完全相同,则( )A 、U 1∶U 2=1∶5B 、R 1∶R 2=1∶4C 、R 1∶R 2=4∶1D 、R 1∶R 2=5∶111、如图6,电源为四节干电池串联,R 1=3Ω,R 2=6Ω,当开关闭合时,电压表示数是( )A 、2VB 、3VC 、4VD 、6V12、L 1标有“220V 、100W ”,L 2标有“110V 、40W ”,把它们并联后接在110V 的电源上,则( )A 、L 1较亮B 、L 2较亮C 、一样亮D 、不是同时发光不好比较13、L 1标有“220V 、40W ”,L 2标有“220V 、15W ”,把它们串联后接在220V 电源上,下面分析正确的是( )A 、两盏电灯的总功率等于55WB 、较亮的灯是L 1C 、两灯都不能正常发光D 、若电源电压是440V,两灯就都能正常发光了14、某同学在检修一只标有“220V 、800W ”的电炉时,发现电炉丝断了一小截,他用一截同种材料但较细的电炉丝,取长度相同的一截补接在断裂处,再接入220V 的原电路中使用,那么它的实际功率将( )A 、大于800WB 、等于800WC 、小于800WD 、以上三种情况都可能是可能的电表示数变化类15、如图7所示,当S 闭合,滑片P 向右移动时( )A 、V 1、V 2示数都减小,电流表示数增大B 、V 1、V 2示数都变大,电流表示数减小C 、V 1示数增大,V 2示数减小,电流表示数减小D 、V 1示数减小,V 2示数增大,电流表示数减小16、如图8所示,当S 闭合,滑片P 向右移动时( )A 、电流表示数减小,电压表示数也减小B 、电流表示数增大,电压表示数也增大C 、电流表示数不变,电压表示数不变D 、电流表示数不变,电压表示数减小17、如图9所示,当S 闭合,滑片P 由中点向右移动时( )A 、A 1、A 2示数都减小,电压表示数不变B 、A 1、A 2示数都变大,电压表示数减小图1 F 1 A BO F 2 D C 图2 O A G R 1 R 2 V 图6 图8 A V P 图4L 1 L 2 A S V图15 C 、A 1示数增大,A 2示数减小,电压表示数增大D 、A 1示数减小,A 2示数增大,电压表示数不变18、如图10所示,L 1标有“6V 、3W ”,R=8Ω,闭合S 后,L 1恰能正常发光,若用标有“6V 、6W ”的灯L 2替换L 1,那么L 2的实际功率( )A 、等于6WB 、小于6WC 、大于6WD 、以上都有可能19、如图11所示,闭合开关S 后,两灯都不亮,电流表和电压表都没有示数,则故障可能是( )A 、L 1短路B 、L 1断路C 、L 2短路D 、L 2断路20、如图12所示,闭合开关S 后,两灯都正常发光,一段时间后,其中一盏灯突然熄灭了,电流表的示数不变,则故障可能是( )A 、L 1短路B 、L 1断路C 、L 2短路D 、L 2断路21、如图13,闭合开关后,两灯都不亮,把电压表接在A 、B之间,电压表无示数;把电压表接在B 、C 之间,电压表有数,则故障可能是( )A 、L 1短路B 、L 1断路C 、L 2短路D 、L 2断路估算类22、小红将掉在地上的的物理课本捡回桌面,她所做的功最接近( )A 、0.03JB 、0.3JC 、3JD 、30J23、在2006年中考体能测试中,某同学选择跳绳。
中考英语易错题专项练习精选(含答案)
初中中考英语必考易错题含答案解析1、Be careful when the streetA. to crossB. crossC. you crossD. you’ll cross【解析】当你通过马路时要当心。
用一般现在时,答案为C。
2、The book ______ you want is on the desk Which of the following isn’t right?A.thatB.whichC./D.it【解析】请注意,是让你选哪个不正确。
定语从句可用that和which引导,并且that可省略,答案为D。
3、 Our teacher saw us ______ on the desks and went out of the classroomA. to sitB. satC. sitingD. sitting see【解析】sb. doing sth.看见某人正在做某事。
see sb. do sth.看见某人做过某事。
sit 现在分词形式为sitting.故答案选D4、----Don’t play the dangerous game any more ----Sorry! I _____ do it againA.can’tB.don’tC.won’tD. mustn’t【解析】表示将来用will,否定形式为won’t,答案为C。
意为:我以后不会再做了。
5、 ---The rain came to a stop the night before The fields are still full of water ---It_____ for nearly a weekA. has rainedB. had rainedC. would rainD. was raining【解析】came to a stop“停止”the night before"前一个晚上"for+一段时间用于完成时,而came 表明是过去时,所以后面用过去完成时。
中考数学重难点易错题汇总含答案解析
精品基础教育教学资料,仅供参考,需要可下载使用!最新初三九年级中考数学易错题集锦汇总学校:__________ 姓名:__________ 班级:__________ 考号:__________ 题号 一 总分 得分注意事项:1.答题前填写好自己的姓名、班级、考号等信息2.请将答案正确填写在答题卡上评卷人得分 一、选择题1.如图,能判定 AB ∥CD 的条件是( )A .∠1=∠2B .∠1+∠2= 180°C .∠3=∠4D .∠3+∠1=180°2.下列各式中从左到右的变形,是因式分解的是( )A .(a+3)(a-3)=a 2-9;B .x 2+x-5=(x-2)(x+3)+1;C .a 2b+ab 2=ab (a+b )D .x 2+1=x (x+x1) 3.用科学记数方法表示0000907.0,得( )A .41007.9-⨯B .51007.9-⨯C .6107.90-⨯D .7107.90-⨯ 4.小马虎在下面的计算中只做对了一道题,则他做对的题目是 ( )A .222)(b a b a -=-B .6234)2(a a =-C .5232a a a =+D .1)1(--=--a a5.方程x 3=22-x 的解的情况是( ) A .2=x B .6=xC .6-=xD .无解 6.已知235x x ++的值为 3,则代数式2391x x +-的值为( )A .-9B .-7C .0D .37.下列事件中,届于不确定事件的是( )A .2008年奥运会在北京举行B .太阳从西边升起C .在1,2,3,4中任取一个教比 5大D .打开数学书就翻到第10页8.下列长度的三条线段能组成三角形的是( )A .5cm,3cm,1cmB .6cm,4cm,2cmC . 8cm, 5cm, 3cmD . 9cm,6cm,4cm9.在下面四个图形中,既包含图形的旋转,又有图形的轴对称设计的是( )A .B .C .D .10.下列说法中,正确的是( )A .一颗质地均匀的骰子已连续抛掷了 2000次,其中抛掷出 5点的次数最少,则第2001次一定抛掷出 5点B .某种彩票中奖的概率是1%,因此买100张该种彩票一定会中奖C .天气预报说明天下雨的概率是50%,所以明天将有一半时间在下雨D .抛掷一枚图钉,钉尖触地和钉尖朝上的概率不相等11.某地区10户家庭的年消费情况如下:年消费l0万元的有2户,年消费5万元的有l 户,年消费1.5万元的有6户,年消费7千元的有1户.可估计该地区每户年消费金额的一般水平为()A.1.5万元 B.5万元 C.10万元 D.3.47万元12.三角形的一个外角小于与它相邻的内角,这个三角形是()A.直角三角形B.锐角三角形C.钝角三角形D.属于哪一类不能确定13.下列图形中,由已知图形通过平移变换得到的是()14.在同一平面内垂直于同一条直线的两条直线必然()A.互相平行B.互相垂直C.互相重合D.关系不能确定15.△ABC和△DEF都是等边三角形,若△ABC的周长为24 cm ,△DEF的边长比△ABC 的边长长3 cm,则△DEF的周长为()A.27 cm B.30 cm C.33 cm D.无法确定16.下列命题不正确的是()A.在同一三角形中,等边对等角B.在同一三角形中,等角对等边C.在等腰三角形中与顶角相邻的外角等于底角的2倍D.等腰三角形是等边三角形17.在△ABC中,∠A:∠B:∠C=2:3:5,则△ABC是()A.锐角三角形B.钝角三角形C.直角三角形D.无法确定18.等腰三角形的“三线合一”是指()A.中线、高、角平分线互相重合B.腰上的中线、腰上的高、底角的平分线互相重合C.顶角的平分线、中线、高线三线互相重合D . 顶角的平分线、底边上的高及底边上的中线三线互相重合19.在△ABC 中,已知AC AB = ,DE 垂直平分AC ,50=∠A °,则DCB ∠的度数是( )A . 15°B .30°C . 50°D . 65°20.将如图1所示的Rt △ABC 绕直角边BC 旋转一周,所得几何体的左视图是( )21.画一个物体的三视图时,一般的顺序是( )A .主视图、左视图、俯视图B .主视图、俯视图、左视图C .俯视图、主视图、左视图D .左视图、俯视图、主视图22.要了解一批电视机的使用寿命,从中任意抽取30台电视机进行试验,在这个问题中,30是( )A .个体B .总体C .样本容量D .总体的一个样本23.济南市某储运部紧急调拨一批物资,调进物资共用4小时,调进物资2小时后开始调出物资(调进物资与调出物资的速度均保持不变).储运部库存物资S (吨)与时间t (小时)之间的函数关系如图所示,这批物资从开始调进到全部调出需要的时间是( )A .4小时B .4.4小时C .4.8小时D .5小时 24.若分式3242x x +-有意义,则字母x 的取值范围是( ) A .12x = B .23x =- C .12x ≠ 23x ≠-25.把图中的角表示成下列形式:①∠AP0;②∠P;③∠0PC;④∠0;⑤∠CP0;⑥∠AOP.其中正确的有()A.6个B.5个C.4个D.3个26.盒子中有白色乒乓球8个和黄色乒乓球若干个,为求得盒中黄色乒乓球的个数,某同学进行了如下实验:每次摸出一个乒乓球记下它的颜色,如此重复360次,摸出白色乒乓球90次,则黄色乒乓球的个数估计为()A.90个B.24个C.70个D.32个27.如图所示的 6 个数是按一定规律排列的,根据这个规律,括号内的数应是()A.27 B.56 C.43 D.3028.现有两个有理数 a、b,它们的绝对值相等,则这两个有理数()A.相等 B.相等或互为相反数 C.都是零 D.互为相反数29.某天股票A 开盘价 19 元,上午 11:30 跌1. 5 元,下午收盘时又涨了 0. 5 元,则投票A 这天收盘价为()A.0.3 元B.l6.2 元C.16.8 元D.18 元30.蜗牛在井里距井口 lm 处,它每天白天向上爬行 30 cm,每天夜晚又下滑 20 cm,则蜗牛爬出井口需要的天数是()A.11 天B.10 天C.9 天D.8 天31.小红妈妈的 2 万元存款到期了,按规定她可以得到 2 的利息,但同时必须向国家缴 纳 20% 的利息所得税,则小红妈妈缴税的金额是( )A .80 元B .60 元C .40 元D .20 元32.求0.0529的正确按键顺序为( )A .B .C .D .33.下列方程中,是一元一次方程的为( )A .x+y=1B .2210x x -+=C .21x =D .x=034.有下列计算 :①0-(-5)=-5;②(-3)+(-9)=-12;③293()342⨯-=-;④(36)(9)4-÷-=-.其中正确的有( )A . 1个B . 2个C .3个D .4个35.一个五次多项式,它的任何一项的次数( )A .都小于5B .都等于5C .都不大于5D .都不小于536.⎩⎨⎧==21y x 是方程3=-y ax 的解,则a 的值是( ) A .5 B .5- C .2 D .137.下列说法中正确的是 ( )A .直线大于射线B .连结两点的线段叫做两点的距离C .若AB=BC ,则B 是线段AC 的中点D .两点之间线段最短38. 在△ABC 中,∠A =30°,∠B =50°,则∠C 的外角=( )A .60°B .80°C .100°D .120°39.如图,∠AOC=∠BOD=90°,下列结论中正确的个数是( )①∠AOB=∠COD ;②∠AOD=3∠B0C ;③∠AOD+∠BOC=∠AOC+∠BODA .0个B .l 个C .2个D .3个40.若两个角互为补角,则这两个角( )A .都是锐角B .都是钝角C .一个是锐角,另一个是钝角D .以上结论都不全对41.下列说法中,错误的是( )A .经过一点可以画无数条直线B .经过两点可以画一条直线C .两点之间线段最短D .三点确定一条直线42.12-的绝对值是( ) A .2- B .12- C .2 D .1243.下列说法中正确的是( )A .从三角形一个顶点向它对边所在直线画垂线,此垂线就是三角形的高B .三角形的角平分线是一条射线C.直角三角形只有一条高D.钝角三角形的三条高所在的直线的交点在此三角形的外部44.如图所示,是轴对称图形的个数有()A.4个B.3个C.2个D.1个45.将如图所示的图形按照顺时针方向旋转90°后所得的图形是()46.如图,已知 6.75r=,则图中阴影部分的面积为(结果保留π)()R=, 3.25A.35π⋅B.12.25πC.27πD.35π47.如图,由△ABC平移而得的三角形有()A. 8个B. 9个C. 10个D. 16个48.下列各式中不是不等式的为()A.25x=D.610x+≤C.58-<B.92y+> 49.关于单项式322-的系数、次数,下列说法中,正确的是()2x y zA.系数为-2,次数为 8B.系数为-8,次数为 5C.系数为-23,次数为 4D .系数为-2,次数为 750.直角三角形在正方形网格纸中的位置如图所示,则cos α的值是( )A . 43B . 34C . 53D . 5451.下列说法中,正确的个数是( )①样本的方差越小,波动性越小,说明样本稳定性越好;②一组数据的方差一定是正数;③一组数据的方差的单位与原数据的单位是一致的;④一组数据的标准差越大,则这组数据的方差一定越大.A .1个B .2个C .3个D .4个52.如图,在两半径不同的圆心角中,∠AOB=∠A ′O ′B ′=60°,则( )A .AB=A ′B ′ B .AB<A ′B ′C .AB 的度数=A ′B ′的度数D .AB 的长度=A ′B ′的长度53.△ABC 中,A = 47°,AB = 1.5 cm ,AC=2 cm ,△DEF 中,E = 47°,ED =2.8 cm ,EF=2. 1 cnn ,这两个三角形( )A . 相似B .不相似C . 全等D . 以上都不对54.在△ABC 中,AB=AC ,∠A=36°.以点A 为位似中心,把△ABC 放大2倍后得△A ′B ′C ′,则∠B 等于( )A .36°B .54°C .72°D .144°55.如图,∠APD =90°,AP =PB =BC =CD ,则下列结论成立的是( )A .ΔPAB ∽ΔPCA B .ΔPAB ∽ΔPDAC .ΔABC ∽ΔDBAD .ΔABC ∽ΔDCA56.如图,已知21∠=∠,那么添加下列一个条件后,仍无法..判定ABC ∆∽ADE ∆的是( )A .AE AC AD AB = B .DE BC AD AB = C .D B ∠=∠ D .AED C ∠=∠57.若正比例函数2y x =-与反比例函数k y x=的图象交于点A ,且A 点的横坐标是1-,则此反比例函数的解析式为( )A .12y x =B .12y x =-C .2y x =D .2y x=- 58.如图,梯形ABCD 中,AB ∥DC ,AB ⊥BC ,AB =2cm ,CD =4cm .以BC 上一点O 为圆心的圆经过A 、D 两点,且∠AOD =90°,则圆心O 到弦AD 的距离是( )A .6cmB .10cmC .32cmD .52cm59.等腰三角形的腰长为32,底边长为6,那么底角等于( )A . 30°B . 45°C . 60°D .120°60.下列事件,是必然事件的是( )A .掷一枚均匀的普通正方形骰子,骰子停止后朝上的点数是1B .掷一枚均匀的普通正方形骰子,骰子停止后朝上的点数是偶数C .打开电视,正在播广告D .抛掷一枚硬币,掷得的结果不是正面就是反面61.如图,扇形 OAB 的圆心角为 90°,分别以 OA 、OB 为直径在扇形内作半圆,P 和Q 分别表示两个阴影部分的面积,那么 P 和Q 的大小关系是( )A .P=QB .P>QC .P<QD . 无法确定62.某飞机于空中 A 处探测到平面目标 B ,此时从飞机上看目标B 的俯角α=30°,飞行高度AC= 1200 m,那么飞机到目标B 的距离AB为()A.2400m B.1200m C.4003 m D.12003 m 63.已知二次函数22(21)1y x a x a=+++-的最小值为 0,则a的值为()A.34B.34-C.54D.54-64.一箱灯泡有 24 个,灯泡的合格率是87.5%,则从中任意拿出一个是次品的概率是()A.0 B.124C.78D.1865.设有 10 个型号相同的杯子,其中一等品 7个、二等品 2个、三等品 1 个,从中任取一个杯子是一等品的概率等于()A.310B.70lC.37D.1766.书架的第一层放有 2 本文艺书、3 本科技书,书架的第二层放有 4 本文艺书、1 本科技书,从两层各取 1 本书,恰好都是科技书的概率是()A.325B.49C.1720D.2567.在一个有 10 万人的小镇,随机调查了 2000人,其中有 250 人看中央电视台的早新闻,在该镇随机问一个人,他看早新闻的概率大约是()A.0.75 B. 0.5 C. 0.25 D. 0.12568.有左、中、右三个抽屉,左边的抽屉里放有 2个白球,中间和右边的抽屉里各放一个红球和一个白球,从三个抽屉里任选一个球是红球的概率是()A.14B.13C.16D.2569.在今年的中考中,市区学生体育测试分成了三类,耐力类,速度类和力量类。
人教版九年级物理内能易错题集锦
(每日一练)人教版九年级物理内能易错题集锦单选题1、如图所示,是我国古代《墨经》最早记述了秤的杠杆原理,有关它的说法正确的是()A.“标”“本”表示力,“权”“重”表示力臂B.图中的B点为杠杆的支点C.“权”小于“重”时,A端一定上扬D.增大“重”时,应把“权”向A端移答案:D解析:A.“标”“本”表示力臂,“权”“重”表示力,故A错误;B.杠杆绕着O转动,故O为支点,故B错误;C.“权”小于“重”时,A端可能上扬,因为杠杆平衡原理可知,平衡不仅与力有关还与力臂有关,故C错误;D.增大“重”时,重与OB的乘积变大,在权不变的情况下可以增大标,故应把“权”向A端移,故D正确。
故选D。
2、如图所示,用20N的拉力F沿水平方向拉绳子的一端,使重400N的物体A以0.2m/s的速度沿水平地面向左匀速运动了10s,已知滑轮组的机械效率为90%,则此过程中()A.绳子自由端移动的距离为2mB.滑轮组对物体A的水平拉力为54NC.拉力F的功率为4WD.拉力F所做的有用功为120J答案:B解析:A.由图可知,连接动滑轮绳子的股数n=3,绳子自由端移动的速度为v绳=nv物=3×0.2m/s=0.6m/s则绳子自由端移动的距离为s绳=v绳t=0.6m/s×10s=6m故A不符合题意;B.由公式η=W有用W总=fs物Fs绳=fs物Fns物=f3F可得物体A受到的摩擦力为f=3ηF=3×90%×20N=54N由于物体A匀速运动,所以滑轮组对物体A的水平拉力等于物体A受到的摩擦力,大小为54N,故B符合题意;C.因为P=Wt=Fst=Fv所以拉力F做功的功率为P=Fv绳=20N×0.6m/s=12W故C不符合题意;D.拉力所做的有用功,即克服物体A与水平面之间的摩擦力做的功为W有=fs=fv物t=54N×0.2m/s×10s=108J故D不符合题意。
故选B。
【中考英语易错题】中考英语陷阱题大全(含答案解析)
初中中考英语必考易错题含答案解析1、---My computer doesn’t work at all ---Don’t worryI think I can put it ______for youA.wellB.rightC.goodD.up【解析】 A和C都是“好”的意思,但这个好是与一般相对的,D是“上”的意思,B是“ 正确”“恢复正常”的意思我电脑坏了---不要担心,我认为我可以帮你修好。
答案为B。
2、---Did you _____ the first place of the league match? ---Of course we did We _____ allthe other teamsA.beat, beatB. beat ,wonC. win, wonD.win, beat.【解析】win“获胜”、“得到成功”,在作为及物动词时,它的宾语往往是奖品、地位、奖学金、名誉、财产、战争或运动等等beat也有“赢”、“取胜”、“战胜”之意。
但跟win的用法不同,这个动词后面跟的是比赛、竞争中的对手或战争中的敌人。
答案为D。
3、 ---How many English words had you learned _____ the end of last term? ---Around , butI’ve forgotten most of themA. byB. atC. toD. on【解析】By the end of 到....为止如果后面接将来时间,主句用将来时,如果后面是现在时间,主句用现在完成时,如果是过去时间,主句用过去完成时。
At the end of “在...尽头”后面接时间时,一般用过去时或将来时。
答案为A。
4、No matter _____ you do, you must do it as well as possibleA.whatB.howC.whenD.where【解析】no matter how不管如何,no matter what无论什么事 no matter when 无论什么时候 no matter where 无论哪里答案为A。
中考英语易错题含答案解析
中考英语易错题含答案解析1、 ---My trousers are______ ---I’ll buy you a new pairA. wore outB. worn outC. wearing outD. sold out【解析】wear out 穿坏,sell out卖完。
裤子是被穿坏,而不是主动的,所以是被动语态,答案B。
2、 The boy put his money in his inside pocket,_______he?A. doesn’tB. didn’tC.won’tD.isn’t【解析】这个男孩把他的钱放进他内口袋了,是不是?说明是过去的事,用过去时。
答案为B。
put 的过去时put3、---Alice,why didn’t you come here yesterday? ---I ____ , but my son suddenly fell ill and I had to take him to the hospitalA.hadB.didC.was going toD.didn’t【解析】我本来打算去,但是我儿子病了,我不得不带他去医院答案为C。
4、Could you give me ______ second chance please?A.anB./C.theD.a【解析】序数词前加the,表示第几...。
序数词前加a,表示再一,a second再一次,并且说明对方已经给过一次机会。
答案为D。
5、 ---You must what I have done for you before you leave ---Well, how much does it_____? Is dollars enough?A. pay for, costB. pay, spendC. spend, pay forD. pay, cost【解析】为某事支付用pay for. 某事花费多少钱,用cost。
中考英语单项选择易错题100道(含答案解析)
中考易错题100道一、单项选择1.Which is the way to the __________?A. shoe factoryB. shoes factoryC. shoe’s factoryD. shoes’ factory2.________ it is today!A. What fine weatherB. What a fine weatherC. How a fine weatherD. How fine a weather3.This class ________ now. Miss Gao teaches them.A. are studyingB. is studyingC. be studyingD. studying4.We will have a _________ holiday after the exam.A. two monthB. two-monthC. two month’sD. two-months 5.There is no enough ________ on the corner to put the table.A. placeB. roomC. floorD. ground6.We can have _____ blue sky if we create _____ less polluted world.A. a; aB. a; theC. the; aD. the; the7.— Are you ________ American or English?— English. We are working in Wuhu.A. aB. \C. theD. an8.You like playing basketball, and he likes running, ____?A. don’t youB. doesn’t heC. do youD. does he9.— Why not take ________ umbrella with the sign “ Made in China”?It is _____ useful umbrella?— What _______ good advice it is!A. an; an; aB. an; a; \C. a; an; aD. \; an; a10.— When shall we meet again next week?—_______ day is possible. It’s no problem with me.A. EitherB. NeitherC. EveryD. Any11.Robert has gone to _________ city and he’ll be back in a week.A. otherB. the otherC. anotherD. any other12.— A latest magazine, please.— Only one left. Would you like to have ________?A. itB. oneC. thisD. that13.— Which book would you like to borrow?— ________ of the two books is OK with me.A. EitherB. BothC. AnyD. None 14.Mrs. Lee teaches ________ math. We all like her.A. weB. usC. ourD. ours 15.There are many trees on ________ side of the street.A. eitherB. anyC. allD. both 16.________ is the population of the city?A. How manyB. WhatC. How many peopleD. How much17.—Why don’t we take a little break?—Didn’t we just have _______?A. itB. thatC. oneD. this 18.The teacher asked the boy many questions, but he only answered ___ of them.A. someB. lotsC. eachD. few 19.About ______ the fans are waiting here. They want to see the great singer.A. two thousand ofB. two thousandC. thousand ofD. two thousands of20.— How many apples do I have?— You can have ______. I want none of them.A. oneB. allC. bothD. some 21.Japan is ________ the east of China. Fujian is ____ the southeast of China.A. in; inB. to; inC. on; toD. in; to 22.The postman shouted, “Mr. Green, here is a letter ________ you.”A. toB. fromC. forD. of 23.He hasn’t heard from his friend _________ last month.A. sinceB. by the end ofC. forD. until 24.— Jimmy lost his key yesterday.—________? It’s his third time in just one month.A. Has heB. Did heC. Was heD. Does he 25.You’ve passed the exam. I’m happy ______ you.A. onB. atC. inD. for26.I wonder ________ they finished so many different jobs in such a short time.A. whyB. howC. whenD. where 27.— Ought I to go right now?— ________.A. That’s very bad.B. Yes, you go ought toC. Yes, you oughtD. No, you ought not to28.I don’t know when he ________. When he _______ here, I’ll call you in a minute.A. will come; will arriveB. comes; arrivesC. will come; arrivesD. comes; will arrive29.He turned ________ the radio a little because his father was asleep.A. onB. downC. upD. off30.I don’t know the homework _______ today.A. onB. inC. ofD. for 31.— Would you like some coffee?— Yes, and please get me some milk. I prefer coffee ____ milk.A. withB. toC. ofD. on 32.They each ___ a book. Each of them ___ from China.A. has; areB. have; isC. are having; areD. is having; is 33.— ________ you ________ your book to the library?— Yes. I returned it yesterday.A. Did, returnB. Have, returnedC. Will, returnD. Do, return 34.Though it’s cloudy now, it ________ get sunny later.A. canB. mayC. mustD. need35.It is in the library, you _______ talk loudly.A. may notB. can’tC. needn’tD. mustn’t 36.If anyone wants to say something in class, you ______ put up your hands first.A. mustB. mayC. shouldD. can 37.The pen _________ him ten yuan.A. paidB. costC. tookD. spent 38.The train _________ for twenty minutes.A. leftB. has leftC. is leavingD. has been away39.— How many books _____ they ________?—Five. But they haven’t finished reading even one。
中考总复习初中物理经典易错题100例
中考总复习初中物理经典易错题100例力和运动1.在湖中划船时,使船前进的的动力是()A.桨划水的推力B.水直接对船的推力C.人对船的推力D.水对桨的推力2.踢到空中的足球,受到哪些力的作用( )A受到脚的作用力和重力 B受到重力的作用C只受到脚的作有力 D没有受到任何力的作用3.一辆汽车分别以6米/秒和4米/秒的速度运动时,它的惯性大小:()A.一样大;B.速度为4米/秒时大;C.速度为6米/秒时大;D.无法比较4.站在匀速行驶的汽车里的乘客受到几个力的作用( )A.1个B.2 个C.3个D.4个5.甲、乙两个同学沿相反的方向拉测力计,各用力200牛.则测力计的示数为( )A、100牛B、200牛C、0牛D、400牛6.一物体受到两个力的作用,这两个力三要素完全相同,那么这两个力( )A 一定是平衡力B 一定不是平衡力C 可能是平衡力D 无法判断7.体育课上,小明匀速爬杆小刚匀速爬绳。
有关他们受到的摩擦力下面说法正确的是()A、因为爬杆时手握杆的压力大,所以小明受到的摩擦力一定大B、因为绳子粗糙,所以小刚受到的摩擦力一定大C、小明和小刚受到的摩擦力一定相等D、若小明的体重大,则他受到的摩擦力一定大8.如图所示,物体A在水平力F的作用下,静止在竖直墙壁上.当水平力减小为F/2时,物体A恰好沿竖直墙壁匀速下滑.此时物体A所受摩擦力的大小()A.减小为原来的1/2 B.和原来一样 C.增大为原来的2倍D.无法判断9.蹦极游戏是将一根有弹性的绳子一端系在身上,另一端固定在高处,从高处跳下,a是弹性绳自然下垂的位置,C点是游戏者所到达的最低点,游戏者从离开跳台到最低点的过程中,物体速度是如何变化的?_______________ 10.A、B两物体叠放在水平桌面上,在如图所示的三种情况下:①甲图中两物体均处于静止状态;②乙图中水平恒力F作用在B物体上,使A、B一起以2m/s的速度做匀速直线运动;③丙图中水平恒力F作用在B物体上,使A、B一起以20m/s的速度做匀速直线运动。
人教版九年级中考单选易错题104道 包含答案
人教版九年级中考易错题104道(四)--含答案()1.—What_____to your city in recent years?—Lots of wide roads,tall buildings and beautiful parks have been built.A.takes placeB.have happenedC.has happenedD.happened() 2.—Does your father still smoke?—No,he has succeeded in_____smoking for three years.A.giving upB.give upC.gives upD.gave up() 3.In the past,I often wrote letters to my friends.But now we keep in touch_____each other by telephones and the Internet.A.toB.ofC.forD.with() 4. The family was_____poor_____they couldn’t buy a TV set.A.so;thatB.not;untilC.not;butD.so;but() 5.—_____my daughter is only ten years old,she knows a lot.—What a clever girl!A.BecauseB.WhetherC.ThoughD.So( ) 6.He got up______late______he was late for work today.A.such...asB.so...thatC.very...thatD.too...to()7.______it rains heavily,______farmers are still working in the fields. A. Though,but B.Though,still C.Though,/ D.Although,but() 8. —I helped a disabled man yesterday.—_____wonderful experience!A.WhatB.How aC.HowD.What a() 9.Jessie learned a lot______the book after reading it.A.fromB.OfC.atD.with()10.We now______him by writing letters.A.keep away fromB.keep onC.keep distanceD.keep in touch with()11.He has lived in Hunan______1998.A.forB.inC.sinceD.at()12. He is good at______basketballA.playB.playing C.to play D.Plays()13. I study English by______English movies.A.watchB.to watch C.watching D.Watches()14. I don’t want to watch TV,What about______basketball?A. playB.to play C.playing D.play( )15. It is very exciting for him______English.A.studyB.to study C.studying D. studies()16.______was interesting to play with my cousin.A.ThisB.ThatC. ItD. He()17. Mr.Smith is eighty now.He is______old______work.A. too,toB.so,that C.very, to D.too, not()18. The______you work,the______grades you will get.A. hard,goodB.harder,betterC. harder,good D. hard, better()19.The______you do,the______you will do.A.carefully, goodB. carefully, betterC.more carefully,goodD.more carefully,better()20. I_____really quiet.Now I’m very outgoing.e to beed to bee toed to()21. Ann____to choose her own clothes,but she isn’t allowed to get her ear pierced yet.A.is allowedB.allowC.allowedD.is allowing()22. —What___you do if you had a million dollars?—I’d give it to charity.A.willB.didC.wereD. would()23. —Jack,you look tired today.What’s wrong?—I was_____busy___I didn’t go to bed until midnight yesterday.A.too,toB.enough,toC.so,thatD.such,that()24.When I heard that I would go to Beijing with my classmates,I couldn’t help_____.A.sing and jumpB.singing and jumpC.singing and jumpingD.sing and jumping()25. I have to finish my homework first____cleaning up the room.A. because ofB.instead ofC.in front ofD.at the end of()26. —Jack,please don’t look out of the window.—_____.A.It’s right.B.I know that.C.Sorry,I don’t do it again.D.It doesn't matter.()27. —I have to be home by10:00p.m.—_____.A. So do IB.So have IC.So I doD.So I have()28. —When____the car invented?A.isB.wasC.hasD.be()29. She likes_______cookies.They are hard,dry and easily broken.A. crispyB.sweetC.saltyD.sour()30. My mother hopes_______her do some housework first.A.me to helpB.me helpC.me that I can helpD.that I can help()31. —What’s your plan for the coming vacation?—I’d like to go________.A. anywhere relaxingB.somewhere relaxingC.relaxing anywhereD.relaxing somewhere()32.Taiwan is______the southeast of China and Japan is_______the east of China.A.in;inB.in;toC.to;toD.to;on()33. I hate those________don’t help others when they are in trouble.A.whoB.whichC.theyD.them()34. _______you do,I will support you.A.WheneverB.HoweverC.WhoeverD.Whatever()35. The plane________because of the bad weather.A.put upB.put offC.put awayD.put on()36. He reminds me______his brother.A.atB. toC. inD. of()37.—Why not get your ears_____?They will be nice.—As a student,I'm not_________.A.pierce;allowedB.pierced;allowingC.pierce;allowingD.pierced;allowed()38.The Great Green Wall can stop the wind and sand_____to the rich land in the south of China.A.moveB.to moveC.from movingD. moved()39.The boy is often heard_________in the music room.He sings very well.A.practice singing B.to practice singing C.practiced singing()40.—What senior school do you want to go,Li Hua?—It's hard for me_________a decision now.A.doB.to doC.makeD.to make()41.We have to_________ourselves when we are away from home.A.look atB.look forC.look upD.look after()42. —Can I take the magazines out?—No,sir.They_________out of the reading room.It's a rule. A.needn't be taken B.can't take C.mustn't be taken D.should not take()43.He made his sister_______at last.She began to laugh.A.stop cryingB.to stop cryingC.stop to cryD.to stop to cry()44.In many places in China,the old over90______not only by their family but also by the government.A.is taking good careB.are taken good careC.is taken good care of D.are taken good care of()45. Drivers should have_________.A.earrings B.uniforms C.licenses D.clothes() 46. Tom doesn't study at all.He will_________the test,I think.A.failB.passC.getD.take()47. There aren't many tickets left for the concert.You'd better______that you get one today.A.make sure ofB.make a decisionC.make sureD.make plans() 48. —Are you_________about selling your house?—Yes.I need money.A.seriousB.afraidC.strictD.nervous() 49. —I think students can go out alone on school nights.—_________.They may meet some bad people. A.I hope so B.I don't think so C.I agree with you D.I think so()50.Reading English aloud in the morning is a good way______English well.A. for learningB. to learnC. that learnD. with learning()51.Can you tell me______?A. where does he liveB. how did he come here yesterdayC. what his job isD. that he is good at English()52. He_____think he was wrong______I showed the answer to him.A.didn't;at allB. didn't;untilC.won't;untilD. not;until()53.My parents always ask me______lies because it is bad for a student.A. don't tellB. not tellingC. no tellD. not to tell()puters_______in everyday life in this country before long.A.will be usedB.is usedC.will useD.was used()55.The Green family________London for nearly two years.They all miss their hometown very much.A.left B.will leave C.have left D.have been away from()56. —Must I finish the article now?—No,you________.You can do it later.A.must B.can’t C.may D.needn’t()57.Do you know______during the coming holiday?A.what will Tom doB.what did Tom doC.What Tom will doD.what Tom did()58.To welcome the29th Olympic Games,a lot of money_____in improving the environment in Beijing.A.takeB.spendC.spentD.was spent()59.Does Tom often play_____football after_____school?A./,/B./,the C.the,/D.a,a()60. How wonderful!The_____is made of_________.A.house,glass B.house,glasses C.houses,glass D.houses,glasses()61.Every morning Mr.Smith takes a______to his office.A.20minutes’ walk B.20minute’s walkC.20-minutes walk D.20-minute walk ()62.Uncle Tom asked David, Sam,___brothers and___three to help write the cards.A.my,I B.my,me C.myself,I D.myself,me()63.The man______Mary was so tall that she could hardly see the show. A.in front of B.in the front of C.at the back of D.at the beginning()64.The garden______while the Greens were away from home.A.took good care of B.was taken good careB.was taken good care of D.was taking good care()65. —Have you finished___the book?—Not yet.I’ll try____it to you before Friday.A.reading,returning B.to read,to returnC.reading,to return D.to read,returning()66.Many people watched the boys______the mountain at that time. A.climb B.climbing C.to climb D.climbed()67. India had the second______population in the world.A.largest B.larger C.most D.smallest()68. When father was young,he______from morning till night.A.was made work B.was made workingC.made to work D.was made to work()69.Five-year-old children are______young_____go to school.A.too,to B.so,that C.very,to D.enough,to()70.—____I put my coat here?—Sorry,you______.A.Must;mustn’t B.Do;don’tC.can;needn’t D.May;can’t()71.Tom wants to try_____some of his ideas.A.on B.off C.out D.to()72.Could you tell me if it_____tomorrow?A.rain B.will rain C.raining D.rains()73. Do you know______at the bus stop?A.whom they are waiting for B.who they are waitingC.whom are they waiting for D.who are they waiting()74. He is seriously ill;there is______hope for him.A.a few B.few C.little D.a little()75. Be sure not________that again. A.to do B.doingC.did D.Does()76. Teenagers shouldn’t be allowed________,they are not serious enough. A.to drive B.drive C.driving D.to driving()77.I regret not________a new skirt.A.buying B.buys C.bought D.buy()78. I________to have a part-time job.A.am not allowB.not allowC.don’t allowD.am not allowed()79. We should manage________our housework. A.do B.did C.to do D.doing()80.He can’t speak English,I can’t,______.A.tooB.eitherC.alsoD.neither()81.The room________every day.A.cleansB.must cleanC.be cleanedD.must be cleaned()82.Sorry,your car______in front of the hotel.A.can putB.be not putC.can’t be putD.can be not put ()83.If he carries on driving like that,he'll________dead. A.take up B.make up C.end up D.walk up()84.V olunteering in the society will be_______. A.a good experience B. good experienceC.good a experienceD.good experiences()85. —Do you agree_______the plan?—Yes,but I don’t agree______what he said.A.to;withB.with;toC.on;withD.to;on()86.—Look at the sign on the right.—Oh,smoking_______here.A.doesn’t allowB.isn’t allowedC.didn’t allowD.wasn’t allowed()87.If people_______cutting down the forest,they will have nowhere_____.A. keep,to live inB.will keep,to live inC.keep,to liveD.will keep,to live()88.Lucy speaks English_______.She can talk to the guests from the USA.A.enough goodB.enough wellC.good enoughD.well enough()89.It's very hot in the room.Would you please keep the window_______?A.openB.opensC.to openD.close()90.James,I’m too tired.Let’s stop_______a rest.A.havingB.haveC.to havingD.to have()91.The twins are good at_______.They are both in the_______ club. A. run,run B.runs,running C.run,ran D.running,running()92.Tom agreed_______ friends with me.A.makeB.makesC.makingD.to make()93. I don’t _______your opinion.A. care aboutB.care forC.take care ofD.take care()94.Our English teacher is very strict_______us and he is strict_________his teaching.A.with,atB.with,withC.at,atD.with,in()95.—What’s the matter?—They said I should not be allowed____here.They don’t allow____in the waiting room.A.smoking,to smokeB.to smoke,smokeB.to smoke,smoking D.smoking,smoking()96.He doesn’t do his homework________,though he has________. A. carefully enough,enough time B.enough carelessly,time enough C. carelessly enough,enough time D.enough carefully,enough time()97.Everyone____________to have at least eight__________sleep at night. A.needs,hour’s B.need,hours’ C.needed,hour’s D.needs,hours’()98.Something is wrong with my PDA. I will get it_____.A.repairB.repairingC.to repairD.repaired()99.—Excuse me,you are_________of my passing through.—I’m sorry,here you go.A.on the wayB.in the wayC.out the wayD.off the way()100.Jill didn’t finish the homework,_________.A.eitherB.tooC.alsoD.neither()101.You must concentrate more_________your English.A.toB.inC.onD.at()102.She put on her sister’s sweater _______ because it was too dark.A. by accidentB. by chanceC. by mistakeD. by choice()103.My home is near the school . It takes me _____ ten minutes to get to school every day.A. much thanB. much moreC. less thanD. at last()104. The 24th Winter Olympics will _____ in China in 2022.A. happenB. take placeC. happen toD. be taken place参考答案:1-10 CADAC BCDAD11-20 CBCCB CABDB21-30 ADCCB CABAD31-40 BBADB DDCBD41-50 DCADC ACABB51-60 CBDAD DCDAA61-70 A/D BACC BADAD71-80 CBACA AADCB81-90 DCCAC BCDAD 91-100 DDADC ADDBA 101-104 CCCB。
中考英语易错题100道及答案
中考英语易错题100道及答案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,谓语动词遵循“就近一致原则”,即由靠近谓语的那个主语决定谓语的人称和数用何种形式。
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人教版九年级下册易错题综合复习一(C )1.Yesterday Mr.Green went to his hometown and visited the old house ____ he was born in.A.whatB.howC.whichD.that(B )2.There are 50 students in Class One. Twenty of them are boys, __ are girls.A.someB.the othersC.the otherD.others(A)3.She often parks her car near the house __ she can get to.A.whichB.whereC.thatD.what(B)4.Is this toy __ you played with last time ?A.thatB.the oneC.whichD.what(ACE)(不定项)5.Is this the toy ___ you played with last time ?A.thatB.the oneC.whichD.whatE./(AD )(不定项)6.Is this the factory __ you worked ?A.in whichB.whichC.thatD.where(B )7.-How can I pay full attention to my homework ?-Turn off your phone and B__ any possible bother.A.keeping offB.keep offC.to keep offD.kept off(C)8.-_C_ your homework faster, Danny. Then you can have more time to have fun.A.DoesB.DoingC.DoD.To do(B )9.I've never seen a movie __ than it.A.the most excitingB.more excitingC.a more excitingD.much exciting(A )10.It's ___ movie I've ever seen.A.the most excitingB.more excitingC.a more excitingD.much exciting(C)11.-May I help you with some jeans, sir ?-Yes, I'd like to try on those blue ___.A.pair C.ones C.one(A )12.- Is the river_____ through that town very large?A which flowsB flowsC that flowingD whose flows(C )13.The pen ___she writes letters is broken.A whichB thatC with whichD by which(D )14.He is one of the students who, I am sure, always do ____ best.A hisB one’sC myD their(A)15.The teacher gave me a piece of paper__A___.A to write onB to be written onC to write inD to be written(C )16.This is a film _C__ Spielberg used real actors instend of stunt men.A.whichB.whoseC.in whichD.of which(A)17.-How often do you write emails to your sister ?-Only once a month. A_ of us has enough time.A.NeitherB.EitherC.NoneD.All(D )18.People's way of life in the north is quite different from _D_ in the south.A.itB.thoseC.thisD.that1.The house is _C_ than that one.A.two-thirds largeB.two third largerC.two-thirds largerrger two-thirds(B )19.-Alice, are you going to Bob's birthday party on Saturday ?-Unless I __.A.will be invitedB.am invitedC.was invitingD.invited(D)20.-Close your eyes and guess what the box is made of.-It's so light. It must be made of__.A.ironB.metalC.silverD.plastic(C)21.-There is so much rubbish in the river.-Yes. Luckily, to save water, many things __.A.are doingB.are going to doC.are going to be doneD.are going to be doing(C )22.We should spend as much time as we can __ our lessons after class.A.to reviewB.reviewC.reviewing(A)23.We should do as much as we can __ our lessons after class.A.to reviewB.reviewC.reviewing(D)24.our school football team won the cup !-Well, it __ be true. We are far from the best team.A.mustn'tB.needn'tC.shouldn'tD.can't(B)25.-Madame Curie is one of the scientists __ won two Nobel Prizes.-She will be remembered by people for __ she discovered.A.that;thatB.who; whatC.who;thatD.which; what(D)26.__ is a pity that you can't go to the concert with me tonight.A.ThatB.WhatC.ThisD.It( C ) 27. — The cakes ____ delicious. I’d like to have one.— OK. Here you are.A. soundB. feelC. lookD. taste( A )28. — How much ____ the pair of gloves?— Twenty dollars ____ enough.A. is; isB. are; isC. is; areD. are; are( C )29.Lucy remembered __ the kitchen before leaving home. But as she entered it after work, she saw it was a mess.A.cleanB.have cleanedC.cleaningD.cleaned( B )30. — Are you busy working on the project, Tim?— Yes. If I finish the ____ earlier, we can go to a movie together.A. surveyB. taskC. goalD. process( A )31. — Do you remember attending Julia’s birthday party, John?— Yes. ____A. It was a really great time for me.B. I’m really looking forward to seeing her.C. Why not prepare a good present for her?D. She must be waiting for us to arrive there soon.( B/D )32.Our school organized a job fair and a computer company ____ my attention.A. matchedB. drewC. influencedD. caught(C )33.-Could I ask your neighbors for help, Tom ?-I'm afraid not. I __ know them.A.onlyB.seldomC.hardlyD.just(C )34.-My parents __ allow me to go swimming in the river without them.-I think so. That's too dangerous.A.shouldn'tB.mustn'tC.wouldn'tD.needn't(C )35.-Like so many creative people he is never __.-That's why he's made lots of valuable paintings.A.cheerfulB.skillfulC.satisfiedD.surprised(B )36.Why can ___ movies help improve our English ?A.to watchB.watchingC.watchedD.watch(A )37.My little sister fell in love with the movie __ Dumbo ___.A.called;as wellB.call; as well asC.called; eitherD.calling; too(C)38.They find __ difficult to understand what native English speakers say.A.thisB.himC.itD.that(A )39.Read something you are interested in, ___ that you have to read.A.orB.andC.but(B )40.Your dream will not come true __ you keep trying your best.A.whenB.unlessC.whetherD.because(C )41.Mr.Zhang, I have trouble ___ the text. Could you help me?-Certainly. First, remember __ it three times at least.A.to understand; readingB.understanding; readingC.understanding; to readD.to understand; to read(B )42.There are so many beautiful T-shirts. I really don’t know __.-Let’s ask the assistant for help.A.what I choose itB.which one to chooseC.how to chooseD.where I choose(B )43.I made a decision to go to Yunnan Province ___.A.on myselfB.on my ownC.in myselfD.in my own(B )44.-Can you give us some advice __ prevent the terrorist attack ? -Sorry. A.on how B.on how to C.to what D.to what to(D)45.I try to pay attention ___ fewer mistakes.A.makeB.makingC.to makeD.to making(A )46.People __ cross the road when the traffic lights are red.A.mustn’tB.needn’tC.mustD.need(B )47.David finds__ difficult to communicate with his parents.A.oneB.itC.thisD.that(D )48. Erquan Yingyue is one of __ pieces of folk music in China.A.more famousB.most famousC.famousD.the most famous(D )49.Everyone ___ down from 10:10.9.8...esB.turnsC.looksD.counts(A )50.___ exciting the news is ! Beijing will hold 2022 Winter Olympic Games.A.HowB.What aC.WhatD.What an(A )51.-I wonder ___. -I’m not sure yet.A.which is hersB.which hers isC.whether is it hersD.whether hers it is(A )52.How she __ that she could have __ in the new year !A.wished; good luckB.wish; good luckyC.hoped; good luckD.hope; a good luck(B )53.-___ your coat, it’s cold today.-Look at me. I’m ___ a coat.A.Wear; putting onB.Put on; wearingC.Dress; wearingD.Dresses; putting on(D)54.Please remind me __ Linda at 9:00 p.m.A.callB.calledC.callingD.to call(B )55.___ fun ___ a trick on someone on April 1st.A.It’s; playingB.It’s; to playC.That; playingD.That’s; to play(C )56.-Have you watched the movie named Amazing China ?-Sure, I have. __ great achievements our country has made !A.What aB.What anC.WhatD.How(D)57.-Do you know if Jim __ to the party ?-I am not sure. But if he___, I will give him a big surprise.es; will comeB.will come; will comees; comesD.will come; comes(D)58.-What did Tom say to you just now, John ? -He asked __.A.why I am so happy todayB.who did I play football with after schoolB.what will I do for the weekend D.if I could go to the movies with him tonight(D )59.-Our school will organize a spring outing next week.-___ wonderful news ! It’ll be a good time to relax ourselves.A.HowB.What aC.How aD.What(B)60.-What’s wrong with Lisa?-She didn’t do well in the exam. She worries about ___ she can pass it.A.thatB.whetherC.whatD.if(B )61.-With __ did you go to Beijing ?-My mother. We went to see my father.A.whichB.whomC.whoD.whose(B )62.-Could you please tell me ___ ?-No problem. It’s on Huayuan Road, a wonderful amusement park.A.where’s there a place to have funB.where there’s a place to have funC.where is a place to have funD.where a place is to have fun(A )63.We can get a lot of famous English movies ___ the Internet.A.onB.withC.byD.about(C)64.-All the money in Mary’s wallet was stolen, but her ID card ____. --But she remained __ as if nothing had happened.A.remained; happilyB.was remained; happilyC.remained;happyD.was remained; happy(A )65.I also learned that not all great ideas _____.A.workB.faileD.send(D )66.-Changchun has been building its subways since 2012.-Yes. It’ll be more convenient for people to go out after they’re all _____. A.processed B.created C.protected pleted(C )67.-Can I go out to play football, Mom ?-Look, your bedroom is in a mess. You can’t go out until it ____.A.cleansB.has cleanedC.is cleanedD.will be cleaned(A )68.-Hi, Pam ! __ this pair of gloves yours ?-No, but the scissors on the desk _____ mine.A.Is;areB.Is;isC.Are;isD.Are;are(A )69.-Have you ever been to ___, Sally ?-Yes, I traveled there last year. And I made friends with lots of __ there.A.Germany;GermansB.German; GermanyC.Germany; GermenD.Germans; Germany(C )70.-Can I go out to play football, Mom ?-Look, your bedroom is a mess. You can’t go out until it ____.A.cleansB.has cleanedC.is cleanedD.will be cleaned(D)71.A new kind of bikes ___ out already.A.have soldB.has soldC.has been soldD.have been sold(A )72.He was made ___ from morning till night.A.to workB.workC.workingD.worked(C )73.This book ____ everybody.A.is known byB.is known forC.is known toD.knows(C )74.-I find it hard to improve my spoken English soon.-Be patient, please. It needs a long __.A.introductionB.experienceC.processD.development(C )75. -You seldom have desserts, __.-___. It’s bad for my teeth, I think.A.do you; Yes, I doB.don’t you; Yes, I do.C.do you; No, I don’tD.don’t you; No, I don’t.(C)76.-People use smartphones ____.-Yes. They are very important in our __ life.A.everyday; everydayB.everyday; every dayC.every day; everydayD.every day; every day(B )77.Don’t play computer games unless your homework _____.A.has doneB.is doneC.was doneD.will be done(A )78.This kind of salad tasted ___ and it sells __.A.good;wellB.well;goodC.well;wellD.good;good(D )79.His bad marks made him ____.A.happyB.to happyC.to be unhappyD.unhappy(B)80.-Hurry up, the bus is coming.-Wait a minute. Don’t cross the street ____ the traffic light is green.A.afterB.untilC.whileD.unless(D )81.His speech __ a cheer among the students. They all __ from their chairs.A.rose; roseB.raised; raisedC.rose; raisedD.raised;rose(D )82.Many students enjoyed the book Harry Potter _____by J.K. Rowling. A.wrote B.was written C.was writing D.written(A )83. -Would your sister go to Hainan this summer?-If I don’t go, _______.A.neither will sheB. neither does sheC. so will sheD. so does she(C )84.My brother and I will go hiking tomorrow.-_____.Shall we go together?A.So do IB. So I doC. So will ID. So I will(B )85.The students are on their way home, ________ and ________ .A. laugh ; talkB. laughing ; talkingC. laughed ; talkingD. are laughing ;talking(B )86. Tomorrow I’ll get my hair_______. It’s a little long.A. cutsB. cutC. to cutD. cutting(C )87.You kept us_______ for a long time.A. waitB. to waitC. waitingD. waited(D )88.The old man needs to spend time ________ his family.A. onB. toC. inD. with(B )89.It would be better _____a mobile phone.A. haveB. to haveC. havingD. had(C )90.—Susan, why are you still here? They are all ready to start.—I’m sorry, but I _____when to leave.A.don’t tellB.didn’t tellC. wasn’t toldD. is told(B )91.__good advice you have given to me ! I'll take it.A.HowB.WhatC.HowD.What a(C )92.The world is changing fast every day. I wonder __ in the future.A.what will the world look likeB.how we think of the worldC.whether the world will have peaceD.which country wins the match(A )93.The show also __ the moving stories behind those people.A.tellsB.talksC.speaksD.says(C)94.—What_____to your city in recent years?-Lots of wide roads,tall buildings and beautifulparks have been built.A.takes placeB.have happenedC.has happenedD.happened (C)95. Jack,please don’t look out of the window.—_____.A.It’s right.B.I know that.C.Sorry,I don’t do it again.D.It doesn't matter.(A)96. —I have to be home by10:00p.m.—_____.A.So do IB.So have IC.So I doD.So I have(A)97.He made his sister_______at last.She began to laugh. A.stop crying B.to stop cryingC.stop to cryD.to stop to cry(C)98.Can you tell me______?A. where does he liveB. how did he come here yesterdayC. what his job isD.that he is good at English(A)puters_______in everyday life in this country before long.A.will be usedB.is usedC.will useD.was used(A/D)100.Every morning Mr.Smith takes a______to his office. A.20minutes’ walk B.20minute’s walkC.20-minutes walk D.20-minute walk。