2020中考备考:单项选择题专项练习1
2020中考冲刺专题训练——选择题
2020中考冲刺专题训练-选择题一、声光1、声音在传播过程中(B)A.音调会逐渐降低B.响度会逐渐减小C.音色会逐渐改变D.音调、响度、音色都会改变2、有一种电动牙刷,它能发出超声波,直达牙刷棕毛刷不到的地方,这样刷牙干净又舒服,则下列说法正确的是(D)A、电动牙刷发出的超声波不能在空气中传播B、超声波不是由物体振动产生的C、超声波的音调很低所以人听不到D、超声波能传递能量3、下列控制噪声的措施中,属于防止噪声产生的是(B)A.关闭房间的门窗B.会场内把手机调到无声状态C.高速公路旁的房屋装隔音窗D.机场跑道工作人员使用防噪声耳罩4、如图1所示,现有一个盛有适量水的透明玻璃杯和一只筷子。
小名同学将一支筷子斜插入盛有适量水的透明玻璃杯中,若小名从杯子正面观察,可能观察到筷子和筷子在杯中水下部分的成像情况最可能的是( B )5、下列叙述中的“影”由于光的折射形成的是( B )A.立竿见“影” B.毕业合“影” C.湖光倒“影” D.形“影”不离6、小红通过实验探究光从水射入空气中的规律,他发现折射角随入射角的增大而增大。
对“当入射角增大到一定程度时,将会出现的现象”有下列猜想,其中你认为合理的是( B )A.折射角变为0°B.折射光线消失C.折射角将大于90°D.没有任何光现象7、光学知识在生活中有很多的应用,下面说法中不正确的有( D )A.通过放大镜观察地上的蚂蚁,能看到正立放大的蚂蚁像B.站在岸边看到水中游动的鱼是光的折射形成的虚像C.检查视力时,医生让被测者观察平面镜中视力表即可,利用了平面镜成像知识D.人眼睛和照相机一样都成缩小的实像,但人眼的视网膜的像是正立的8、小猫在平静的池塘边欣赏自己在水中的像,下图中正确的是(C)9、如图甲所示,有一个圆柱体PQ放在凸透镜前的图示位置,它所成像的形状应该如图乙中的(B)10、在探究凸透镜成像规律的实验中,小明同学使透镜离书本一定距离时,观察到了如图2所示的实验现象。
【2020】中考题型经典解法及模拟演练系列之单项选择(含精析)
许多题目都有这样一些词,它们对于快速而准确的判定答
案起着至关重要的作用,我们称这些词为关键词,找到句
中的关键词也就找到了解题的突破口。
【范例】I saw Kevin in the supermarket this morning..
—No, it _____ him.. He moved to Canada last week..
【范例】_____ you_____ your brother can join us.. We want one of you..
A.. Both; andB.. Neither; nor
C.. Either; orD.. Not only; but also
【解析】由“We want one of you..”可知两个人中选择一个加入,故答案为C项。
6.. 推算法
有些选择题涉及简单的数学常识,所给的答案从语法上看是对的,要选出这种题的正确答案需要进行推算。
【范例】This is Mr.. White’s ____ visit to Beijing.. He has been there twice before..
A.. two B.. second
5..习惯判断法
有的选择题不能根据语法来选出正确答案,而要根据习惯用法来选出答案。应该掌握的习惯用法很多,平时在学习中要注意记忆和归纳。
【范例】The Greens will visit Hainan as soon as they _____ to China..
【解析】as soon as引导的条件状语从句用一般现在时,主句用将来时,故选B。
— of them are very nice..
A.. EitherB.. BothC.. EachD.. All
2020年江西中考模拟卷(一)(有答案)
2020年江西中考模拟卷(一)说明:1.本卷共五大题,24小题,全卷满分100分。
考试时间为70分钟。
2.本卷可能用到的相对原子质量:H—1N—14O—16Na—23Al—27Si—28S—32Fe—56Cu—64Ba—137题号一二三四五总分得分一、单项选择题(本大题包括10小题,每小题2分,共20分。
每小题有四个选项,其中只有一个选项符合题意)1.“东方之星”沉船事故救援时,潜水员钢瓶中携带的气体是()A.水蒸气B.氮气C.二氧化碳D.氧气2.通常情况下,下列溶液的溶质为液体的是()A.蔗糖溶液B.酒精溶液C.食盐溶液D.澄清石灰水3.如图所示实验操作中,正确的是()4.下列各项中,属于《环境空气质量标准》基本监控项目的是()A.H2O浓度B.O2浓度C.N2浓度D.SO2浓度5.下列关于燃烧和灭火的分析错误的是()A.室内着火不能立即打开门窗,是因为会提供充足的氧气B.点燃的火柴竖直向上,火焰很快熄灭,是因为它接触不到氧气C.扑灭森林火灾铲除前方树木设置隔离带,是因为清除了可燃物D.在生煤炉时,可点燃木材来引燃煤,是因为木材的着火点比煤低6.下列说法错误的是()A.地壳中含量最高的金属元素是铝B.用活性炭吸附可以降低水的硬度C.纯碱不是碱D.固态二氧化碳可用于人工降雨7.如图所示是密闭体系中某反应的微观示意图,“”和“”分别表示两种不同元素的原子。
下列说法错误的是()A.参加反应的“”和“”个数比为1∶2 B.反应前后原子种类没有改变C.反应后该密闭体系中没有单质存在D.该反应是化合反应8.如图是A、B、C三种物质的溶解度随温度的变化趋势。
则下列说法正确的是()A.t1℃时A、B、C三种物质的溶解度由大到小的顺序是A、C、BB.t1℃时30g A物质加入50g水中不断搅拌,形成的溶液质量是80gC.A、B两种物质的混合溶液可通过蒸发结晶的方式提纯AD.将t1℃时A、B、C三种物质饱和溶液的温度升高到t2℃时,三种溶液的溶质质量分数的大小关系是B>C>A9.归纳总结是化学学习中常用的方法,下列归纳总结正确的是()A.复分解反应中可能同时生成两种沉淀B.同种元素组成的物质一定是单质C.能使无色酚酞变为红色的物质一定是碱的溶液D.有单质和化合物生成的反应一定是置换反应10.某同学利用初中科学物质间相互转化的知识,设计了如图所示的3条铜的“旅行路线”,每条路线中的每次转化都是通过一步化学反应来实现的,那么,每条路线中可能都有的化学反应类型是()A.化合反应B.分解反应C.置换反应D.复分解反应二、选择填充题(本大题包括5小题,每小题3分,共15分。
2020中考英语备考therebe句型和主谓一致练习题
.历年真题精选一)单项选择1. ______________ L ook! There a pairofglasses and two boxes on the tableA. isB. areC. wasD. were2. If there ____ no buying and selling of animals, there ____ no killing innature.A. is: will haveB. will be; will beC. will be: will haveD. is: will be3. ____________ -- -- There an exciting soccer game on TV last night, but I missed it.--Oh,what a pityA .isB. wasC. hasD. had4. __________________________________ The TV news reports that there a storm the day after tomorrowA. isB. wasC. will beD. has been5. _________ There a clock on my desk. It wakes me up every dayAareB isC. wereD. was6. _________ There some volunteers helping the old clean the house every weekend.A. isB areC. wereD. will be (二)翻译句子1. 这儿过去有一个大的停车场。
There ________________ be a big parking lot.2 .本溪有很多可供游人观赏枫叶的地方。
____________________many places for tourists to enjoy maple leaves in Benxi3. __________________暑假到来时,将会有很多令人兴奋的事情等着我们去做。
2020九年级中考复习考试试题--机械运动
2020年九年级中考复习试题--机械运动一、选择题(每小题3分,共21分)1.小明同学到南美洲游学,见到一种外表酷似微型西瓜的野生水果,其独特的迷你造型和清爽的口感令人称奇。
右图是迷你“西瓜”与一元硬币放在一起的对比照,根据图片信息,估测该迷你“西瓜”的长度约为()A.2mm B.2cm C.6mm D.6cm2.2019年1月3日,“玉兔二号”从停稳在月球表面的“嫦娥四号”上沿轨道缓缓下行,到达月球表面,如图所示。
关于“玉兔二号”下行的过程,下列说法中正确的是()A.若以月球表面为参照物,“嫦娥四号”是运动的B.若以月球表面为参照物,“玉兔二号”是静止C.若以轨道为参照物,“玉兔二号”是运动的D.若以“嫦娥四号”为参照物,“玉兔二号”是静止的3.孙杨在里约奥运会上夺得自由泳200m金牌。
以每50m为一个赛段,他在四个赛段的成绩如表所示,在此次比赛中,孙杨运动最快的赛段是()A.一 B.二 C.三 D.四4.如图是穿行在餐厅的机器人端着托盘送餐的情景。
若认为托盘是静止的,则所选择的参照物是()A.地面 B.机器人C.餐桌 D.墙壁5.流速为5千米/时的河流中有一只自由漂浮的木桶,甲、乙两船同时从木桶位置出发,以如图所示速度计上显示的速度分别逆流、顺流而行,1小时后两船离木桶的距离()A.甲船25千米,乙船35千米B.甲脑30千米,乙船30千米C.甲船35千米,乙船30千米D.无法确定6.今年我市的中考体育测试,小明同学对有关数据的估测,最接近实际情况的是()A. 1000m跑的成绩是20sB. 跳绳的成绩是每分钟150次C. 立定跳远成绩是10mD. 跑完1000m后心跳是每秒20次7.甲、乙两物体,同时从同一地点沿直线向同一方向运动,它们的 s - t 图象如图所示。
下列说法正确的是()A.2~4s内乙做匀速直线运动B.4s时甲、乙两物体的速度相等C.0~4s内乙的平均速度为2m/sD.3s时甲在乙的前方二、填空与作图题(每空1分,第12题3分,共13分)8.如图,骑马是古人最便捷的出行方式。
广东省广州市双桥实验学校2020年九年级中考备考训练试题 解析版
B.5cm
C.3cm
D.2cm
10.抛物线 y=x2+bx+3 的对称轴为直线 x=2.若关于 x 的一元二次方程 x2+bx+3﹣t=0(t
为实数)在﹣1<x<4 的范围内有实数根,则 t 的取值范围是( )
A.﹣1≤t<3
B.3<t<8
C.﹣1≤t<8
D.﹣1<t<4
二.填空题(本大题共 6 小题,每小题 3 分,共 18 分)
知识像烛光,能照亮一个人,也能照亮无数的人。--培根
∴AD=
=
=8,
∵EF⊥AC, ∴AE=CE, 设 AE=CE=x,则 DE=8﹣x, 在 Rt△CDE 中,由勾股定理得:42+(8﹣x)2=x2, 解得:x=5, ∴DE=8﹣5=3(cm); 选:C. 10.解:∵抛物线 y=x2+bx+3 的对称轴为直线 x=2. ∴﹣ =2,解得:b=﹣4,
11.如图,AH⊥BC,若 AB=3cm、AC=4.5cm、AH=2cm,则点 A 到直线 BC 的距离为
.
12.当 x
时,二次根式
有意义.
13.因式分解:a3﹣9a=
.
14.如图,将一张长方形纸片的角 A,角 E 分别沿 BC,BD 折叠,点 A 落在 A′处,点 E
落在边 BA′上的 E′处,则∠CBD 的度数是
;
④
=
,其中正确的结论有
(填写序号).
三.解答题(本大题共 9 小题,共 102 分) 17.解方程组
18.如图,AC=DC,BC=EC,∠ACD=∠BCE.求证:∠A=∠D.
19.先化简,再求值:
,其中 a 是一次函数 y=x﹣3 的图象与 x 轴交点的横坐
备考2020年中考数学复习专题 《圆》综合练习题(含答案)
备考2020年中考数学复习专题《圆》综合练习题一.选择题1.如图,一个小圆沿着一个五边形的边滚动,如果五边形的各边长都和小圆的周长相等,那么当小圆滚动到原来位置时,小圆自身滚动的圈数是()A.4 B.5 C.6 D.102.如图,在⊙O中,弦AB长6cm,圆心O到AB的距离是3cm,⊙O的半径是()A.3cm B.C.4cm D.3.如图为球形灯笼的截面图,过圆心的CD垂直弦AB于D,AB=2dm,CD=4dm,则⊙O半径为()A.2dm B.dm C.dm D.dm4.下列判断中不正确的是()A.半圆是弧,但弧不一定是半圆B.平分弦的直径垂直于弦C.在平面内,到圆心的距离等于半径的点都在圆上D.在同圆或等圆中,相等的圆心角所对的弦相等5.如图,点A、B、C在⊙O上,D是的中点,若∠ACD=20°,则∠AOB的度数为()A.60°B.70°C.80°D.90°6.在菱形ABCD中,记∠ABC=∠α(0°<∠α<90°),菱形的面积记作S,菱形的周长记作C,若AD=2,则()A.C与∠α的大小有关B.当∠α=45°时,S=C.A,B,C,D四个点可以在同一个圆上D.S随∠α的增大而增大7.如图在一次游园活动中有个投篮游戏,活动开始时四个人A、B、C、D在距篮筐P都是5米处站好,篮球放在AC和BD的交点O处,已知取篮球时A要走6米,B要走3米,C要走2米,则D要走()A.2米B.3米C.4米D.5米8.⊙O半径为5,圆心O的坐标为(0,0),点P的坐标为(3,4),则点P与⊙O的位置关系是()A.点P在⊙O内B.点P在⊙O上C.点P在⊙O外D.点P在⊙O上或外9.给定下列条件可以确定一个圆的是()A.已知圆心B.已知半径C.已知直径D.不在同一直线上三点10.如图,△ABC是⊙O的内接三角形,半径OE⊥AB,垂足为点F,连结弦AE,已知OE =1,则下面的结论:①AE2+BC2=4 ②sin∠ACB=③cos∠B=,其中正确的是()A.①②B.①③C.②③D.②11.若半径为5m的圆,其圆心到直线的距离是5m,则直线和圆的位置关系为()A.相离B.相交C.相切D.无法确定12.如图,圆上有A、B、C三点,直线l与圆相切于点A,CD平分∠ACB,且与l交于点D,若=80°,=60°,则∠ADC的度数为()A.80°B.85°C.90°D.95°二.填空题13.如图,在正方形纸片ABCD中,EF∥AD,M,N是线段EF的六等分点,若把该正方形纸片卷成一个圆柱,使点A与点D重合,此时,底面圆的半径为2cm,则此时M、N两点间的距离是cm.14.如图,⊙O的半径OA垂直于弦BC,垂足是D,OA=5,AD:OD=1:4,则BC的长为.15.在我国古代数学著作《九章算术》中记载了这样一个问题:“今有圆材,埋在墙壁中,不知大小,以锯锯之,深一寸,锯道长一尺,问径几何?”问题题意为:如图,有一圆柱形木材埋在墙壁中,不知其直径大小.用锯去锯这木材,锯口深1寸(即CD=1寸),锯道长1尺(即AB=1尺),问这圆形木材直径是多少?(注:1尺=10寸)由此,可求出这圆形木材直径为为寸.16.′如图,在平面直角坐标系xOy中,扇形OAB的圆心角∠AOB=60°,点A在x轴正半轴上且OA=2,带你C为弧AB的中点,D为半径OA上一点,点A关于直线CD的对称点为E,若点E落在扇形OAB内(不含边界),则点E的横坐标x取值范围为.17.如图,以等边△ABC的一边AB为直径的半圆O交AC于点D,交BC于点E,若AB =4,则阴影部分的面积是.18.在一个圆内接四边形ABCD中,已知∠A=100°,则∠C的度数为.三.解答题19.如图AB=3cm,用图形表示:到点A的距离小于2cm,且到点B的距离不小于2cm 的所有点的集合(用阴影表示,注意边界上的点是否在集合中,如果在,用实线表示,如果不在,则用虚线表示).20.如图,⊙O直径AB和弦CD相交于点E,AE=2,EB=6,∠DEB=30°,求弦CD长.21.一条排水管的截面如图所示,已知排水管的半径OA=10m,水面宽AB=12m,某天下雨后,水管水面上升了2m,求此时排水管水面的宽CD.22.如图,已知⊙O的弦AB,E,F是弧AB上两点,=,OE、OF分别交于AB于C、D两点,求证:AC=BD.23.如图,CD为⊙O的弦,P为⊙O上一点,OP∥CD,∠PCD=15°(1)求∠POC的度数;(2)若=,AB⊥CD,点A在CD的上方,直接写出∠BPA的度数.24.如图,四边形ABCD内接于⊙O,∠ABC=135°,AC=4,求⊙O的半径长.25.已知圆O,弦AB、CD相交于点M.(1)求证:AM•MB=CM•MD;(2)若M为CD中点,且圆O的半径为3,OM=2,求AM•MB的值.参考答案一.选择题1.解:因为五边形的各边长都和小圆的周长相等,所以小圆在每一边上滚动正好一周,在五条边上共滚动了5周.由于每次小圆从五边形的一边滚动到另一边时,都会翻转72°,所以小圆在五个角处共滚动一周.因此,总共是滚动了6周.故选:C.2.解:如图所示,由题意知OC=3,且OC⊥AB,∵AB=6,∴AC=AB=3,则OA===3,故选:B.3.解:∵过圆心的CD垂直弦AB于D,AB=2dm,CD=4dm,∴BD=AD=1dm,在Rt△ODB中,OD2+DB2=OB2,即(4﹣r)2+12=r2,解得:r=dm,故选:C.4.解:A、半圆是弧,但弧不一定是半圆,正确;B、平分弦的直径垂直于弦,不正确.需要添加条件:此弦非直径;C、在平面内,到圆心的距离等于半径的点都在圆上,正确;D、在同圆或等圆中,相等的圆心角所对的弦相等,正确,故选:B.5.解:连接OD,∴∠AOD=2∠ACD,∵D是的中点,∴∠AOB=2∠AOD=4∠ACD=80°,故选:C.6.【解答】解:A、错误.菱形的周长=8,与∠α的大小无关;B、错误,∠α=45°时,菱形的面积=2•2•sin45°=2;C、错误,A,B,C,D四个点不在同一个圆上;D、正确.∵0°<α<90°,S=菱形的面积=2•2•sinα,∴菱形的面积S随α的增大而增大.故选:D.7.解:根据题意得:A、B、C、D在以P为圆心,半径是5米的圆上.∴OA•OC=OB•OD,即6×2=3×OD.解得OD=4.故选:C.8.解:∵点P的坐标为(3,4),∴由勾股定理得,点P到圆心O的距离==5,∴点P在⊙O上,故选B.9.解:A、不能确定.因为半径不确定,故不符合题意;B、不能确定.因为圆心的位置不确定,故不符合题意;C、不能确定,因为圆心的位置不确定,故不符合题意;D.不在同一直线上三点可以确定一个圆.故符合题意;故选:D.10.解:连接AO,延长AO交⊙O于M,连接BM、CM、EM.∵AM是直径,∴∠AEM=90°,∴AE2+EM2=AM2,∴AE2+EM2=4,显然无法判定BC=EM,故①错误,∵∠ACB=∠AMB,∴sin∠ACB=sin∠AMB==,故②正确,∵∠ABC=∠AMC,∴cos∠ABC=cos∠AMC==,显然无法判断CM=AE,故③错误,故选:D.11.解:根据圆心到直线的距离等于圆的半径,则直线和圆相切.故选:C.12.解:设圆心为O,连接OA、OC,∵=80°,=60°,∴∠AOC=140°,∠ACB=40°,∵OA=OC,∴∠OAC=20°,∵直线l与圆相切于点A,∴OA⊥l,∴∠OAD=90°,∴∠CAD=70°,∵CD平分∠ACB,∴∠ACD=∠ACB=20°,∴∠ADC=180°﹣∠CAD﹣∠ACD=90°,故选:C.二.填空题(共6小题)13.解:根据题意得:EF=BC,MN=EF,把该正方形纸片卷成一个圆柱,使点A与点D重合,则线段BC形成一半径为2cm的圆,线段BC是圆的周长,BC=EF=2π×2=4π,∴的长=EF==,∴n=120°,即∠MON=120°,∵OM=ON,∴∠M=30°,过O作OG⊥MN于G,∵OM=2,∴OG=1,MG=,∴MN=2MG=2,故答案为:2.14.解:连接OB,∵OA=5,AD:OD=1:4,∴AD=1,OD=4,OB=5,在Rt△ODB中,由勾股定理得:OB2=OD2+BD2,52=42+BD2,解得:BD=3,∵OD⊥BC,OD过O,∴BC=2BD=6,故答案为:6.15.解:延长CD,交⊙O于点E,连接OA,由题意知CE过点O,且OC⊥AB,则AD=BD=AB=5(寸),设圆形木材半径为r,则OD=r﹣1,OA=r,∵OA2=OD2+AD2,∴r2=(r﹣1)2+52,解得r=13,所以⊙O的直径为26寸,故答案为:26.16.解:当点E落在半径OA上时,连接OC,如下图1所示,∵∠ADC=90°,∠AOB=60°,点C为弧AB的中点,点A(2,0),∴∠COD=30°,OA=OC=2,∴CD=OC•sin30°=2×=1,∴OD=O C•cos30°=2×=,∴AD=OA﹣OD=2﹣,∵DE=DA,∴OE=OD﹣OE=﹣(2﹣)=2﹣2,即点E的坐标为(2﹣2,0);当点E落在半径OB上时,连接OC,CD,如图2所示,由已知可得,CE=CA=CB,由上面的计算可知,OE=2﹣2,∴点E的横坐标为:(2﹣2)×cos60°=﹣1,点E的纵坐标为:(2﹣2)×sin60°=3﹣,∴E(﹣1,3﹣),∴满足条件的点E的横坐标x取值范围为﹣1<x<2﹣2.故答案为﹣1<x<2﹣2.17.解:如图,连接OD,OE,DE.∵△ABC是等边三角形,∴∠A=∠B=60°,∵OA=OD=OB=OE=2,∴△AOD,∠EOB都是等边三角形,∴∠AOD=∠EOB=60°,∴∠DOE=60°,△DOE是等边三角形,∴∠DOE=∠EOB,∴弓形DE与弓形BE的面积相等,∵CD=DE=CE=2,∴△CDE是等边三角形,∴S阴=S△CDE=×22=,故答案为.18.解:∵四边形ABCD是⊙O的内接四边形,∴∠C+∠A=180°,∴∠C=180°﹣100°=80°.故答案为:80°三.解答题(共7小题)19.解:到点A的距离小于2cm,且到点B的距离不小于2cm的所有点的集合如图所示:20.解:过O作OF⊥CD,交CD于点F,连接OD,∴F为CD的中点,即CF=DF,∵AE=2,EB=6,∴AB=AE+EB=2+6=8,∴OA=4,∴OE=OA﹣AE=4﹣2=2,在Rt△OEF中,∠DEB=30°,∴OF=OE=1,在Rt△ODF中,OF=1,OD=4,根据勾股定理得:DF==,则CD=2DF=2.21.解:如图:作OE⊥AB于E,交CD于F,∵AB=12m,OE⊥AB,OA=1m,∴OE=8m.∵水管水面上升了2m,∴OF=8﹣2=6m,∴CF==8m,∴CD=16m.22.证明:连接OA、OB,∵OA=OB,∴∠A=∠B,∵=,∴∠AOC=∠BOD,在△AOC和△BOD中,,∴△AOC≌△BOD,∴AC=BD.23.解:(1)∵OP∥CD,∴∠OPC=∠PCD=15°,∵OP=OC,∴∠OPC=∠OCP=15°,∴∠OCD=30°.(2)①如图1中,当AB在点O的左侧时,连接PA,PB,OD,OA,OB.∵OC=OD,∴∠OCD=∠ODC=30°,∴∠COD=120°,∵=,∴∠AOB=∠COD=120°,∴∠APB=∠AOB=60°.②如图2中,当AB在点O的右侧时,同法可得∠ACB=60°,∵∠APB+∠ACB=180°,∴∠APB=120°,综上所述,∠APB=60°或120°.24.解:∵四边形ABCD内接于⊙O,∠ABC=135°,∴∠D=180°﹣∠ABC=45°,∴∠AOC=2∠D=90°,∵OA=OC,且AC=4,∴OA=OC=AC=2,即⊙O的半径长为2.25.解:(1)连接AD、BC.∵∠A=∠C,∠D=∠B,∴△ADM∽△CBM∴即AM•MB=CM•MD.(2)连接OM、OC.∵M为CD中点,∴OM⊥CD在Rt△OMC中,∵OC=3,OM=2 ∴CD=CM===由(1)知AM•MB=CM•MD.∴AM•MB=•=5.。
中考英语备考 时态综合 练习题(含答案)
2020中考英语备考时态综合练习题一.历年真题精选(一)单项选择1. Sarah______ many places of interest in Beijing already A. visited B. has visited C. will visit D. visits2.--- What did you do for your father on Father’s Day? ---I______ a book for my father.A. buyB. will buyC. have boughtD. bought3. Her grandpa______ for many years. Now he is in good health.A. exercisesB. has exercisedC. exercisedD. was exercising4.---Tom,can you help me lay out the fruits now? ---Sorry, I can’t. I_____ English on the InternetA. have learned B learned C. am learning D. learn5.--- Why were you in such a hurry just now? ---Oh, my mum______ for me at the school gateA. waitedB. will waitC. was waitingD. has waited6.--- Our teacher with us often_____ games after class. ---Your teacher is so nice!A. playB. playedC. is playingD. plays7. He_______ a member of the school basketball team since two years ago.A. joinedB. has become C, has joined D. has been8.-- - May I speak to Mr. Black? ---Sorry, he_____ Hong Kong. But he_____ back in a few daysA. has been in: will comeB. has been in: cameC. has gone to: cameD. has gone to; will come9. Tom is not here. He_____ in the health club.A. is exercisingB. was exercisingC. exercisesD. exercised10. Luckily,I arrived home before it___________ A. rains B. is raining C rained D. will rain11.--- Excuse me,could you tell me the way to the Haitang Mountains? ---Sure . Go down this road and turn left.You_____ the mountains near the village. A see B. saw C. have seen D will see12.---What’re you doing here? ---My daughter_____ back. I'm waiting for her.A. hasn’t comeB. wasn't comingC. didn't comeD. won't come13. We hope to manage our own lives because we______ up. A. grew B. have grown C. grow D. were growing14.---Hello,may I speak to Tom? ---Hold on, please, He______ a shower.A. takes B, is taking C, was taking D, took15.I think if Julia helps with my English, I______ my English a lot.A. will improve B, improve C, have improver D. improve16.---I’ m afraid the meeting has begun. ---Don't worry. It_____ until the bell______.A. will begin; ringsB. doesn't begin: will ringC. won't begin: will ring D, won't begin; rings17. I_____ in the supermarket when the rain came suddenly yesterday.A. am shoppingB. shoppedC. was shoppingD. have shopped18. Our geography teacher told us that the earth ______ the sun.A. went aroundB. goes aroundC. is going aroundD. was going around19.I think it is true that Jill______ to work today because she is on a tripA. has comeB. didn't comeC. is coming D will not come20.As the sun_______, the birds began to sing A. has risen B. will rise C. is rising D. was rising21. John and I_____ to visit his grandparents last Sunday afternoonA. goB. wentC. will goD. have gone22. With the development of science and technology, robot cooks_____ in our families in the futureA. appearB. appearedC. will appearD. are appearing23. New media, like Wechat, ______ the ways of communication nowadays.A. are changingB. will changeC. changedD. were changing24. ---Did you hear the strange noise next door around 10o'clock last night? ---No, I_____ my favorite TV programmein my bedroom. A. watch B. watched C was watching D. am watching25. Be quiet! A bird______ something on the window A. ate B. eats C is eating D has eaten26. I've just returned from my trip to London. I_____ many interesting places there.A. visitB. will visitC. am visitingD. visited27. ---Look at my new smart phone ---Wow, it's so cool! When and where_____ you_____ it.A. do: buyB. have; boughtC. did; buyD. have: had28. The recent rain storms in southern China______ the local people much troubleA. were causing B will cause C. have caused D cause29. Even if you learn something well, you_____ it unless you use it.A. forgetB. forgotC. have forgottenD. will forget30. My parents and my sister______ dumplings when I got home yesterday evening.A. are makingB. madeC. have made D were making31. Simon looks worried because he______ a writing competition and now he's waiting for the resultA enters B. entered C. will enter D. is entering(二)翻译句子32.我的祖父母已经结婚50年了。
2020中考基础题专练一
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荷山中学 2020 中考数学基础题专练
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2020届中考化学必备选择题100题汇总及答案解析
2020届中考备考化学选择题专项练习100题(类型齐全+解析)1.下列变化中,属于化学变化的是()A. 粉笔折断B. 棉纱织布C. 木材燃烧D. 汽油挥发2.如图所示实验基本操作正确的是()A. 闻气味B. 倾倒液体C. 取固体药品D. 加热液体3.对生活中下列现象的解释错误的是()现象解释A湿衣服在夏天比在冬天干得快温度升高,分子运动速率加快B用肉眼不能直接观察到二氧化碳分子二氧化碳分子很小C在无外力下,花粉会在平静的水面上移动分子在不断运动D白行车轮胎在阳光下暴晒而炸裂分子受热,体积变大A. AB. BC. CD. D4.下列物质中存在氧分子的是()A. 空气B. 过氧化氢C. 高锰酸钾D. 水5.下列是一些装置气密性的检查方法,其中正确的是()第1页共63页第2页,共63页A.B.C.D.6. 概念之间存在交叉、并列或包含关系。
若有关概念之间存在如下图所示的关系,则下列选项中的概念符合图中所示关系的是( ) 选项 A B C D m 化合物 化合物 物理变化 分解反应 n 纯净物 单质 化学变化 燃烧 Q单质氧化物缓慢氧化化合反应A. AB. BC. CD. D7. 甲醇是一种“绿色能源”.甲醇完全燃烧的反应可表示为:2CH 4O+xO 2点燃2CO 2+4H 2O ,其中x 的数值和O 2中氧元素的化合价分别是( )A. 3,−2B. 3,0C. 6,−2D. 4,08.下列实验操作错误的是()A. 测定液体的pHB. 稀释浓硫酸C. 蒸发D. 称量NaOH固体9.下列“不一定“的说法正确的是()①化合物中的某种元素转变为单质不一定要通过分解反应②在一定的条件下二氧化碳与水反应不一定生成碳酸③能使紫色石蕊试液变蓝色的物质不一定是碱④可燃物在燃烧时不一定产生火焰.A. ①②③④B. ②③④C. ①③④D. ①③10.下列实验现象的描述正确的是()A. 铁丝在氧气中燃烧,火星四射,生成黑色固体,放出大量的热B. 磷在氧气中燃烧,产生大量的白色烟雾C. 木炭在氧气中燃烧,发出蓝色火焰,产生大量白烟D. 硫在空气中燃烧,生成无色的二氧化硫气体11.下列金属中,不能从CuSO4溶液中置换出Cu的是()A. ZnB. AlC. AgD. Fe第3页共63页12.现有反应:4A+5B=4C+6D,已知C与D的相对分子质量之比为 5:3,现将17g A,与一定质量B恰好完全反应,生成30g C,则该反应中B与D的质量比为()A. 40:27B. 16:9C. 5:6D. 31:1813.如图是甲、乙、丙三种物质的溶解度曲线,下列叙述正确的是()A. t1℃时,等质量的甲、丙溶液中所含溶质的质量分数为丙>甲B. t2℃时,20g丙溶解于50g水中能形成70g溶液C. 分别将三种物质的饱和溶液从t3℃降温至t2℃时,所得溶液溶质质量分数的大小关系为乙>甲=丙D. 若要将组成在N点的甲溶液转变为M点的甲溶液,可采取恒温蒸发溶剂的方法14.下列不属于缓慢氧化的是()A. 动物呼吸B. 酿造米酒C. 食物腐败D. 生火做饭15.下列对于Fe、Fe2+、Fe3+的说法不正确的是()A. 核电荷数相同B. 相对原子质量相同C. 属于同一种微粒D. 属于同一种元素16.在庆典活动中,人们常用氦气充灌气球,其利用了氦气的性质有()①密度比空气小;②在空气中不会发生燃烧和爆炸;③是一种无色气体;④不能供给呼吸.A. ①②B. ③④C. ①②③D. ②③④17.下列物质的用途,主要利用了物质的物理性质的是()A. 氧气用于急救病人B. “干冰”用于人工降雨C. 甲烷用作燃料D. 氮气、氦气做保护气18.物质世界充满了变化,下列变化中,属于化学变化的是()A. 胆矾研碎B. 轮胎爆炸C. 铁钉生锈D. 干冰升华19.关于催化剂的叙述正确的是()A. 催化剂在化学反应中起催化作用B. 催化剂只能加快化学反应速率C. 催化剂在化学反应前后其质量和性质不变D. 用过氧化氢溶液制氧气的反应必须使用二氧化锰作催化剂20.下列物质中,属于纯净物的是()第4页,共63页A. 汽水B. 干冰C. 加铁酱油D. 新鲜空气21.厕所用清洁剂中含有盐酸,如果不慎洒到大理石地面上,会发出嘶嘶声,并有气体产生.这种气体是()A.氢气B. 二氧化硫C. 氧气D. 二氧化碳22.向100g水中不断加入固体A或改变温度,得到相应的溶液①~⑤.下列说法正确的是()资料:A的溶解度温度/℃2030405060溶解度/g37.241.445.850.455.2A. ②中A的质量分数最大B. ③⑤中A的质量分数相等C. ②④⑤的溶液为饱和溶液D. ①③④⑤中没有固体存在23.有化学反应3A+B+2C=D,将A、B、C各15g混合均匀后加热,生成了30gD.向残留物中加入10gA后,反应又继续开始,待反应再次停止后反应物中只剩余C.以下说法中正确的是()A. 第一次反应停止时B剩余了9gB. 第一次反应停止时C剩余了6gC. 反应中A和C的质量比为5:3D. 第二次反应后C剩余了5 g24.下表是一些物质的pH,其中显碱性的是()物质番茄肥皂水牛奶酱油pH 4.0-4.49.5-10.5 6.3-6.6 4.0-5.0A. 番茄B. 肥皂水C. 牛奶D. 酱油25.将一定量的丙烷(C3H8)和氧气置于一个密闭的容器中引燃并充分反应,测得反应前后各物质的质量如表所示,下列判断不正确的是()第5页共63页物质C3H8O2H2O CO2X反应前质量/g 4.412.8000反应后质量/g007.2 4.4aA. 表中a的值一定是5.6B. 若8.8g丙烷完全反应,则生成14.4g水C. 生成物X中一定含有氢元素D. 若4.4g丙烷与16.0g氧气充分反应,则无X生成26.2008年9月27日,太空第一次留下了“中国人的脚印”.我国研制的航天员舱外服为航天员成功进行太空行走提供了可靠的保证.航天员舱外服内含有与氢氧化钠性质相似的氢氧化锂(LiOH),它不可能具有的化学性质是()A. 与二氧化碳反应B. 与盐酸反应C. 与氯化铜溶液反应D. 与氧化铁反应27.将一枚洁白的铁钉浸入稀硫酸中,下列叙述中正确的是()①铁钉表面产生气泡②液体由无色逐渐变为浅绿色③铁钉的质量减轻④液体的质量增加.A. ②③B. ①②④C. ①②③D. ①②③④28.如图是“空气中氧气体积分数测定”实验的改进装置,主要操作是:在实际容积为150mL的集气瓶里,先装进50mL的水,再按图连接好仪器,按下热的玻璃棒,白磷立即被点燃。
2020中考英语备考情景交际练习题含答案
2020中考英语备考情景交际练习题一.单项选择1.---May I use your computer, Mr. Black? ---. I will use my ipad instead.A Go ahead B. Thank you C. Sorry, you can,t D. I'm afraid not2.---This is your order, a sandwich and an apple pie.? ---I,ll have them here.A. For here or to goB. Something to drinkC. Anything elseD. Am I right3.---? ---I,m afraid that I have got a bad coldA. What's the matter with youB. How old are youC. Have you taken your temperatureD. What would you like4.---It's said that shopping online is safe ---. You' d better be carefulA. I agreeB. That dependsC. I think soD. No problem5.---I'm awfully sorry for bringing you so much trouble. --A. Never mindB. It's a pleasureC. Of course notD. You are welcome6.---You look smart today! --A. Not goodB. That' s OKC. What a shame!D. Thank you7.---W hat's Han Mei like? --A. She is a volunteerB. She studies very hardC. She likes skatingD. She is heavy but beautiful8.---Excuse me, where's the library? ---. I'm new here, too ---Thank you all the same.A Sorry, I don' t know B. That way, pleaseC. This is the libraryD. There it is9.---Hello, haven't seen you for a long time! You look fine! --A. Oh, no B Thanks C. Great D. Not at all10.---So kind of you to give me a ride to the bus stop. --A. My pleasureB. Never mindC. It doesn't matterD. That's nothing to do11.---My friends and I are going out for a picnic tomorrow --A. My pleasureB. Have a good time!C. Help yourselvesD. What a pity!12.---? ---Yes. Id like some beef noodles.A. May I take your orderB. May I borrow your rulerC. What club do you want to joinD. What size would you like13.---May I speak to Mr. Smith? ---, please. I'll see if he is inA. Sounds goodB. Hold onC. Don't worryD. Come on14.---Let's invite Nick and Nora to Shanghai Disneyland with us.---. I'll give them a call right now.A. Sounds goodB. That's too badC. Don't wor ryD. Better not15.---Would you like to travel with me after this exam? ---. I can't wait.A. That's all rightB. Of course notC. Yes, Pd love toD. What a pity二.补全对话1)A:Did you listen to the weather report this morning?B:No, 1.?A:There is a rainstorm coming.B:2.?A: It will be here by tomorrow night.B:Bad luck! We will have a vacation the day after tomorrow.A:3.?C:Not decided yet. Maybe Shenyang or Benxi.A: Why not look up the weather information for the coming 3 days on the Internet?B:4.. I will do it right away. Thank you.A:5..2)A:Hello! This is Wang Hong. 1.?B:Yes, Li Mei speakingA: Hi, Li Mei. Our summer holidays are coming. What are you going to do?B:2..A:Beijing? That is a good place to visit.B:Right, would you like to go with me?A:3.. I have to take piano lessons this summer.B: Oh, what a pity!A:Yeah... By the way, 4.?B:With my parents.A:5..Bye.C:Thank you. Bye.3)A: I heard you went to the West Lake in Hangzhou for a trip with your family last weekend.Is that true?B. Yes. We also went to Leifeng Pagoda for a visit.A.You're lucky. 1.?B.It was great. But there were too many people.A:2.?C. A bus took us there. 3.?A:No. I had to stay at home to look after my mother last weekendB:What was wrong with your mother?A:4..B: I'm sorry to hear that. 5.?A.Yes, much better. Thanks for your kindness.B.You're welcome. Oh, the bell is ringing. Let's take the lesson.A. OK! Let's go.4)A:Hello! 1.?B:I'm going to see a filmA:2.?B: Good idea! We can see the film together. Here is my mobile phone and we can go to MEITUAN network to search what is on.A:OK Look, there are some films, such as Incredibles 2, Missing Link and so on.B:3.! I prefer Incredibles 2.A: So do I.B:Shall we book the tickets on the Internet now?A:Certainly. It is cheaper to book the tickets on the Internet... I have got it.B:You are great. 4.?A:At16:00.B:5.. We can do some window shopping firstA: All right. Let's go5)A:Hello! Zhu Hui, have you seen the film Amazing China(《厉害了,我的国》)?B:Not yet. What do you think of it?A:1..B: I heard it's a documentary, but many people like watching it.2.A: It's about China's achievements over the last five yearsB:3..A:Not really, most of its audience are 20 to 29 year old.B:Really? I can't believe that. 4.?A:And the film has caused a patriotic fever爱国热)recently.B:Oh, I'll go to see the film tonight. 5.?A: Ha ha. You know I have seen it. You can ask Li Ming to go with you. He wants to see it.C:OK. I'll call him later.A: Have a good night tonight6)A:Hi, Angela. I heard someone playing the violin. What wonderful music! 1.'B:I did. I often play the violin when I am free.A:2.?B. Twice a weekA:It's really nice. What else do you do in your free time?B:3..A. Like what?B:Taking a walk, doing my lessons, doing sports and so on.4.?A:Besides doing my homework, I have to take many after school classes. I don't have time to do other things to relax myselfB:Why not try to manage your time properly? Yon can listen carefully in class and try to solve your problems at school. Then you' ll have more free time.A:5.. I′ll have a try.B: I believe you can make it7)A:Hi, Li Ming!B:Hi, Wang Dong!A:I hear that we are going to have a class meeting. 1.?B:Tomorrow. Our teacher asked me to host主持)the class meeting.A:I think you can do it. 2.?B:It's about safety. We know safety is important to every studentA:3.?C:We are going to watch a video about safety first, then have a discussion.A:Why not ask a policeman to teach us how to avoid accidents?B:4.. It may help a lot. Thank youA:5..8)A: Hey, Bob! You look so sleepy. What's up?B:1..A: What were you doing last night? Were you doing your homework?B:2.. Mountains of homework. I didn't finish it until midnight.A: Poor boy! No wonder you don't look well.B:You know, less sleep is so bad. 3.?A:Sure. Make a plan before doing your homework. And you'd better do some sports.B:4.. I am going to follow your advice. But I have to take after-school classes at weekends.A. You do? 5.?B:Because my parents want me to get into a good high school.A:Well, perhaps you should talk to them and explain that health is the most importantB:You are right. Thanks for all the good advice. Ill try to talk to them9)A: Hi,Lin TaoB: Hi, Wang Hua. Why are you in such a hurry?A: Well, Linda is having a birthday party. Im afraid I'm late.B:1.?A:It will start at 4:00 pmB;2.. There is much time left. You know Linda is from England and you are supposed to arrive 15 minutes lateA: Oh, yes. I've forgotten it! What present should I take when I meet Linda?B:3.? Girls always like flowers, I think.A:4.! I will buy some in the nearest flower shopB:By the way, will you wear jeans to the party?A: Jeans? Oh, no, I can't wear them to the party. I think I have to change them at onceB:5.. Or you will be really lateA:I think so. Bye!B:Bye-bye!10)A: Good morning, doctor.8:Good morning. 1.?A.I have a stomachache and a sore throatB:2.?A: Ever since last nightB:3.?A: I had lots of ice-cream, chocolate, hamburgers and saladB: That,s probably the reason. You shouldn't eat too much next time. It's bad for your healthA: OK. doctor. 4.. What should I do?B.You should drink more hot water with honey and have a good rest. I think you'll be better soon A: Thank you very much.B:5..11)A:Good afternoon. 1.?B:Yes, Im looking for a pair of shoesA:We have many different kinds of shoes. 2.?B:Size 42. I like this pair. Can I try them on?A:Yes. of courseB:Well, they fit very well. 3.?A:They are 699 yuan.B:4.. Can I see another pair?A. What about this pair? It's much cheaper.B:But I don,t like the colour.A.Well. 5?B.BlackA. Sure. I will get another pair for you12)A:Hi, Alice. You look sad. 1.?B:Well, I love comics, but my mother doesn't allow me to read themA:2.?B: Because she thinks comics will get in the way of my studyA:3.. We do need to spend more time on our studyB:4.. But comics are so interesting that I can,t help thinking about them.A:I understand your situation. 5.?B:I have tried to, but she looked too serious to talk about it.A: Communication is always a better way than keeping things to yourself. I'm sure you will understand each other better after the talkB. OK, I will have a try. Thanks a lot参考答案:一.1 〜5 AAABA 6-10 DDABA 11-15 BABAC1)1.What will the weather be like/How will the weather be2.When will it be/arrive here3.Where are you going/Where are you going to visit..4.Good idea/Great …5.You,re welcome/My pleasure …2)1.May/Can/Could I speak to Li Mei2.I,m go ing to visit Beijing/I'm going to travel to Beijing...3.I'd love to, but I'm afraid I can't.4.who( whom )will you go with/who(whom) are you going with5.Have a nice(good/wonderful/great.)trip/Have fun/Have a good time/ Enjoy yourselves/Have agood vacation( holiday)3)1.How was your trip/How was the West Lake2.How did you go/get there3.Did you go for a trip last weekend/Did you go somewhere last weekend..4.She had a bad cold and coughed day and night/She had a headache/She didn't feel well5.Does she feel better now4)1.What are you going to do2.Can/May I go with you3.What good films4.When will the film start5.Good/Great/OK5)1.I think it's great/wonderful/amazing/fantastic..2.What is it about3.I guess the old people like it better4.Anything else5.Would you like to go with me6)1.Did you play the violin2.How often do you play the violin3.Lots of things/Many things4.How about you/What about you/And you5.Good/Great idea.7)1.When will it start/be/be held2.What is the class meeting about3.What are we going to do on the class meeting/What activities are there on the class meeting4.I agree with you/ That is a good idea/Good idea..5.You're welcome/My pleasure.8)1.I stayed up (too late )last night2.Yes, I was3.Can/ Could you give me some suggestions/ advice4.Good idea/ Sounds great..5.Why/Why do you do that(at weekends)9)1.When/What time will it start2.Just take your time / No hurry/Take it easy..3.What about/How about some flowers4.Sounds good/You're right/That's great/All right5.Hurry up/Come on10)1.What's wrong(with you)/what's the matter(with you)/ What's the trouble( with you)...2.How long have you been like this3.What did you have/eat( last night)4.I will follow your suggestion/ advice5.You're welcome/That s OKThat's all right/Not at all11)1.Can/May I help you/What can I do for you2.What is your size/What size do you want/wear3.How much do they cost/How much are they/What's the price4.It's/ They're too expensive5.What color do you like/prefer12)1.What's the matter(with you)/what's wrong(with you)/What happened.2.Why/Why doesn't she allow you to read them3.Perhaps she is right/ I think she is right.4.I know/I agree with you...5.Have you(ever )tried to talk to her (about this)。
初中历史中考复习 2020年广东省深圳市中考历史试卷(解析版)
2020年广东省深圳市中考历史试卷一、单项选择题(30小题,每小题2分,共60分)。
下列各题的四个选项中,只有一项最符合题意.1.中华文明主要是在适合农业耕作的大河流域诞生的。
如图所示的文物出土于()A.长江流域B.珠江流域C.黄河流域D.辽河流域2.我们的先人很早就认识到生态环境的重要性。
孔子说:“钓而不纲,戈不射宿。
”意思是“不用大网打鱼,不射夜宿之鸟”。
这一观点出自()A.儒家B.道家C.墨家D.法家3.秦统一后,李斯等人制定文字,主要采用古文,力求笔画简洁。
制定出的文字是()A.甲骨文B.金文C.大篆D.小篆4.从现有史料来看,深圳市南头古城一带是汉武帝时期番禺盐官的驻地。
由此可印证汉武帝()A.实施“推恩令”B.实行盐铁专卖C.铸造五铢钱D.建立刺史制度5.在学习历史的过程中,我们可以借助历史文学作品来了解史实。
《三国演义》中“孔明草船借箭”“周瑜打黄盖”的故事有助于我们了解()A.桂陵之战B.官渡之战C.赤壁之战D.淝水之战6.“张公出,丝路兴,文明传。
……大业(年号)始,东都建,运河开。
”材料中的“丝路”与“运河”都促进了()A.南北交通的发展B.经济和文化的交流C.经济重心的南移D.西汉的大一统7.他的词“倾荡磊落,如诗如文,如天地奇观”。
他极大地提高了词的品位,确定了豪放派在宋代词坛的重要地位。
他是()A.李白B.苏轼C.李清照D.关汉卿8.清朝翰林官徐骏在奏章里把“陛下”的“陛”字错写成“狴”。
雍正帝因此将其革职,又派人查他的诗集,以诽谤朝廷的罪名将其治罪。
这反映清朝前期()A.大兴文字狱B.八股取士C.罢黜百家,独尊儒术D.焚书坑儒9.清政府实行闭关政策,特许设立了一个对外贸易机构,负责承销外商进口货物,并管理外国商人。
这一机构是()A.宣政院B.内阁C.广州十三行D.军机处10.近代以来,中华民族的仁人志士为救亡图存和实现现代化而奋斗不息。
以下历史人物和历史事件对应正确的是()A.邓世昌﹣﹣义和团运动B.谭嗣同﹣﹣戊戌变法C.孙中山﹣﹣五四运动D.周恩来﹣﹣秋收起义11.中国共产党不仅是合作共赢的倡导者,更是积极实践者。
2020年中考英语题型复习——单项选择(含答案)
2020 年中考英语题型复习名词)1.-Lisa, could you help me buy some -OK ,Mom. A. potato B .pearC. beef)2. There are 30单项选择A. suggestionB.adviceC. instructionD.information)8. They discussed where to travel this weekend, but at last they still couldn'makeon your way home?D.bananaand 600 in this primary school.A. woman teachers; girl studentsB. women teachers; girl students A. messB. mistakeC. decisionD. dialogue)l. The Blacks are new here. A. TheseB. ThoseC. woman teachers: girls studentsD. women teachers; girls students)3.It's not far from my home to school. It's only about twenty A. hour's B. hours C. minute's D. minuteswalk.)4.-Leo, do you know who the girl in the photo is?-Yes. She is littlesister.A. Ruby and Jason C .Ruby's and JasonB. Ruby's and Jason'sD. Ruby and Jason's)5. My sister studies hard and she always gets goodon her exams.A. marks )6. It is aschool. A. skillB .opinionsC. reasonsD. prizesthat the students aren't allowed to use mobile phones in B. habitC. ruleD. dream)7. -I can't get along well with my parents. Could you give me some-Sure. I think you should spend more time with them. our代词come from Canada.C. WeD. They)2. There is something wrong with my watch. has stopped working. A. It B. One C. This D. That)3.-Where is Tom? His mother is waiting for-Oh, he might be on the playground. A. heB. theyC. himoutside the school gate.D. them)4 . Nancy was very excited because she got many gifts on birthday.A.youB. herC. hisD. my)5.-Mike, is that new bike-Yes. My mother bought it for me yesterday. A.youB. yourC.yoursD. yourself)6. -Did they have fun visiting the Water Park? -Yes. They really enjoy A.theirsB. theirthere.C. themD. themselves)7. In winter, the weather in Harbin is much colder thanin Shenzhen.( )8. --Which of the two T-shirts will you take?-I 'll take . One is for my son and the other is for my husband.A.noneB. allC. neitherD. both( )9. We study Chinese, English, math and some subjects.A. the otherB. othersC. otherD. another( )l0.-Would you like tea or coffee?- , thanks! I 'd prefer a Coke.A. BothB. NeitherC. AllD. Either ( )11. -When should I visit you, this Saturday or this Sunday?-It 's up to you. day is OK for me.A. NeitherB. NoneC. EitherD. EachA. WhatB. WhoC. WhichD. Whose数词( )1. Bert's parents bought him a new computer on his birthday.A.fifteenB. the fifteenC. fifteenthD. the fifteenth ( )2.About of the students in our class have kept diaries in EnglisA. two thirdsB. two thirdC. second threesD. second ( )3. The scientist still works hard though he is in his .A.seventyB. seventiesC. seventiethD. the seventieth( )4. To finish the task, we've tried twice, and next week we'll try tA. a threeB. a thirdC. thirdD. three( )5 There are months in a year and December is the mo( )12.It seems that Henry has to do at the moment. You can ask him to read year.a book.A.everythingB. anythingC.nothingD. something ( )13. -Who helped you clean the bedroom yesterday? - . I cleaned it all by myself.A. NobodyB. EverybodyC. SomebodyD. Anybody ( )14. Many of them heard about that TV show, but saw it.A. a fewB. fewC. a littleD. little( )15.- is your father?A. twelve; twelveB. twelve; twelfthC. Twelfth; twelveD. twelfth; twelfth介词()l. Mr Green's office is the 18th floor. You can take the lift thereA.atB. inC. onD. from( )2. -How did you improve your grammar, Wang Li/- doing grammar exercises.A. WithB. InC. ForD. ByA.itB. oneC. thatD. this -He is a doctor.A.amongB. betweenC. likeD. about形容词)1.We'll be late if we walk there. It's to take a taxi.A. meaningfulB. necessaryC. difficultD. dangerousholiday.A.asB. byC. toD. for( )5. Breakfast is important. You shouldn't go to school it.A.forB. againstC. withoutD. with ( )6. Look! That boy student is walking road carefully.A.acrossB. throughC.overD. of( )7. In the park Li Hua showed a foreigner the way to the park gate English.A.withB. inC. onD. by( )8. It 's very cold today. Please close the door you.A.aroundB. besideC.aboveD. behind( )9. Don't worry, Mom. I will get home 15 minutes.A.sinceB. inC. forD. at( )10. No one can stop her leaving for ShanghaiA.ofB. fromC. to D against( )l1. I remember Susan left a very cold morning of January.A.onB. inC. atD.since( )12. Don't tell anybody about the secret. Keep it you and me. ( )2. Steve is very . He once jumped into the river and saved a boy.A.braveB. honestC. smartD. humorous( )3. It's such a(n) book that I have read it twice.A.boringB. interestingC. boredD. interested( ) 4.Nick is a shy boy, and he feels every time he is asked to read a text inclass.A.lonelyB. nervousC. proudD. lucky( )5. Nelly likes to take a walk in the garden because the flowers in it smell .A.goodB. dirtyC. deliciousD. terrible( )6. Music is as as sports among the teenagers.A.popular B more popular C. the more popular D. the most popular ( )7. The traffic in our city is still pretty bad, but it is a little than it used to be.A. the bestB. betterC. the worstD. worse( )8. Tom is than the other members in his study group.A.funnyB. funnierC. the funnierD. the funniest( )9.we all know that exercise we take, we will be.A. the much; the healthyB. the more; the healthy( )3. -We're all here Scott. Where's he?-He has gone to the library.A. withoutB.exceptC.againstD. besides (()4. Sanya is knownits beaches. Every year lots of people go there for a( )4. Richard is a very serious man. He always thinks very before making adecision.A.politelyB.easilyC. carefullyD. quickly( )5. Few students like to talk to their parents about their problems. , they'dlike to talk to their friends.( )11. It 's one of movies I've ever seen.I'ts worth watching twice.A.more excitingB.excitingC. the least excitingD. the most exciting ( )12. Of all the subjects, math is for Anna. She likes to learn it.A.easyB. difficultC. the most difficultD. the easiest ( )13. Mr. Smith thought the Heping Park was the second park in the city.rgeB. largerC. largestD. the largest副词( )1. Walking is good for my health, so I go to school on foot.A. StillB. FinallyC. InsteadD. Luckily( )6. He has helped you a lot. , you should say thanks to him.A. AgainB. HoweverC. AnywayD. Besides ( )7. This question is more difficult than that one.A.muchB. quiteC.veryD. So( )8.-Do you have any hobbies?-Yes. I have many hobbies, but I like playing the guitar.A. recentlyB. especiallyC. usuallyD. nearly( )9. If you want to know what the word means , you should look it up inA.seldomB. neverC.everD. often ( )2. -How often do you play computer games?- . I 'm not interested in them at all.A. OftenB. UsuallyC. NeverD. Always ( )3. Matt said he would visit Shanghai next month, but he wasn't sureC. the much; the healthierD. the more; the healthier( )10. -How do you like our hometown?-It 's becoming . I enjoy living here.A. beautiful and beautifulB. most and most beautifulC. more and more beautifulD. less and less beautifulthe dictionary.A.simplyB. widelyC. closelyD. exactly( )10. I didn 't get up so as my sister yesterday morning.A.earlyB. earlierC. the earlierD. earliest( )11. I work hard this term, but Peter works even .enough. A.hard B. harder C. the harder D. hardest A.certainly B. probably C. actually D. completely ( )12. Bruce jumped in the long jump! He won first prize.A.farB. fartherC. the fartherD. farthest (冠词( )1. -What did you have for breakfast? ( - glass of milk and two pieces of bread.A.不填;AB.不填;TheC.the; AD. the; The( )2. What useful dictionary it is for beginners of English!(A.anB. theC. aD.不填( )3. February is second month of the year.A.aB. theC. anD. 不填(( )4. Mike and his friends went to Summer Palace yesterday and had greatfun.A. theB. aC. anD.不填(( )5. -What did old man in red buy in your shop?-He bought umbrella. ( A.an; an B. an; a C. the; an D. the; a ( )6. I want to be policeman when I grow up. I think it 's exciting (job.A.a; anB.不填;anC. a; aD.不填;a( )7. Yesterday was Children 's Day. My kids had wonderful time. (A.the; aB.the;不填C.不填;aD.不填;不填动词()1. It 's really kind of you to so much time showing me around.A.costB. spend C take D.pay)2.-Coffee is ready. How nice it ! Would you like some, Alfred?-Yes, thanks.A.feelsB. smellsC. soundsD. touches)3.-Where is Jack?-I'm not sure. He be in the reading room.A.canB. mustC. mayD. need)4. -Can I go to the cinema, Mom?-Certainly. But you be back by 11 o'clockA. couldn 'tB. shouldn'tC. mustD. might)5. The shoe store a sale. The shoes there are at a very low price.A. is havingB. hadC.will haveD. was having)6. The boy hurt his right leg when he to school.A.ridesB. has riddenC. is ridingD. was riding)7. -Would you like to visit the history museum with me next Saturday? -I 'd love to, but I it already.A. was visitingB. am visitingC. have visitedD. will visit)8. Billy is glad that so far he five Chinese songs.A. will learnB. learnedC. has learnedD. is learning)9. The waiters in the restaurant to work at nine every morning.A. are startingB. startC. have startedD. were starting ( ( )10.-I hear Jane has gone to Shanghai for her holiday.-Really? Do you know when she ?A. was leavingB. leavesC. has leftD. left( ( )11. -Mr White, there's something wrong with my computer.-Don't worry. I it for you.(A.checkB. will checkC. checkedD. have checked( )12. It 's said that this hospital last year.A.builtB. was builtC. buildsD. is built ( ( )13. A talk on Chinese history in the school hall next week.A.givesB. is givenC. will giveD. will be given ( ( )14. Every day, too much water .I think everyone should take action to save it. ( A. is wasted B. wastes C. was wasted D. wasted ( )15. -Maria won first prize in yesterday's dancing competition.(-Really? Her parents must be her.A. sure aboutB. afraid ofC. proud ofD. strict with(( )16. Don' t worry. I won 't much of your time. )18.My parents like the talk show. They think it is very funny and can make themA.to laughughingughD. laughed )19. Me. Li agreed meimprove my writing.A.helpB. helpingC.to helpD. helped )20. a healthy life, you need togive up smoking.A.LiveB. LivingC.LivedD. To live句子种类、简单句)1. slowly, Rick There's a school ahead.A. DriveB. To driveC.DroveD. Driving)2. wake up your mom. She needs to have a good rest.A. Don 'tB. Doesn't D. Can'tC. Won't)3. delicious the pizza looks! I can't wait to taste it.A. How aB. How D WhatC. What a)4. interesting story Grandma told me!A. HowB. WhatC. How anD. What an)5.There many apples in the box. You can take some.A.hadB.haveC.wereD.are)6. There an English party in our school tomorrow.A.hasB. haveC. is going to beD. are going to be)7.- honey do you need, Mom?A.take downB. take upC. take ofD. take out (( )17.I hope you can to deal with this problem.A.take part ine up withC.run away fromD. look up to (-Only one spoon.-Seven.A . D. W C . ()8.-()15-HA . HA . Y B. N()9.C .D .-L o连词A . W h )1. ll h ()10.A .s o C. b ut-O n()2. D yo uA . .HA .a C.b ()11.()3. --In -I I 'A . D. HA .s C.or ()12.()4. T I taFr e n-ItA .A . D .C . ()13.()5. Y in a h in a fr-TA . H D . H A .b otB .e-Only one spoon. -Seven.()1C.D.We love spring there are beautiful flowers everywhere. train.A.thoughB. becauseC.whenD. if ( )7. Ted is the basketball teams best player he's the shortest one on it. (A. afterB. unlessC. althoughD. until ( )8.Did Tom go back late last night? ( No. It was just nine o'clock he arrived home.A. whenB. afterC. untilD. if ( ( )9. we were singing, the teacher came in.A. BeforeB. WhileC. SinceD. Till ( )10. You should make a good plan you do anything important. (A.afterB. thoughC. beforeD.until ( )11. You can't leave here your father comes to pick you up.A.ifB. butC. unlessD. and ( ( )12. Let 's stay at home it rains heavily tomorrow.A.becauseB. whileC.unlessD. if( )13.I will wait he comes back, because I have something important to tell ( him.A.beforeB. tillC. whenD. since( )14. We didn't know the good news our teacher told us about it.A.asB. even ifC. untilD. as soon as (( )15. They arrived at the train station late they failed to catch the A. too; to B. enough; to C. so; that D. such:; that )16. Bob goes to a health club he can keep himself strong.A. so thatB. althoughC. as long asD. if)17. Julia decided to buy that book it was a little expensive. A. so that B. even though C. as long as D. ever since)18.-Do you know there is a good restaurant around here?-Sure. Mr. Green's restaurant is very famous and 'ist close to here. A.that B. how C. what D. if)19. -The boat races are so exciting, but our boat is still behind.- Don 't worry. I am sure our team will win!A.whenB. thatC. whetherD.how)20. -What did you say to your mother just now?-I asked her what she for dinner.A. was cookingB. has cookedC. will cookD. is cookin )21. -Look, here is my new handbag.-It 's very nice. Could you tell me ?A. how much was itB. how much will it costC. how much it wasD. how much it will cost)22. -Excuse me, could you tell me some books about science? -Sure. They are on the second floor.A. where can I buyB. where I can buyC. when can I buyD. when I can buy( )23. Could you tell me whonext Sunday?A. will you visitB. you will visitC. how far is your house to the bus stopD. how long it will take me to the train station( )28. -Look! That is the girl I met yesterday.-Oh? She 's my cousin.( )24.-I wonder for the meeting yesterday ( )29. At the meeting, we talked aboutthe museum we visited last week.C. have you visitedD. you have visitedA.whatB.whichC. whoD. where -Because the traffic was heavy.A.whoB. whatC. whomD. whichC. why did you come lateD. why you came lateA. thatB. whoC. whichD. what)25 - Do you know ?-Yes. She came here on foot.参考答案A. how did Emma come hereB. how Emma came here 名词 1-5 CBDDA 6-8 CBCC. why did Emma come hereD. why Emma came here代词 1-5 DACBC 6-10 DCDCB 11-15 CCABA)26. - Dad, I want to know数词 1-5 CABBB-At 9:00 p.m. on Friday.介词 1-5 CDBDC 6-10ABDBB 11-12 ABA. what time will the guests arriveB. how long will the guests stay here 形容词1-5 BABBA 6-10 ABBDC 11-13 DDCC. what time the guests will arriveD. how long the guests will stay here副词 1-5 DCBCC 6-10 CABDA11-12 BD)27. -Excuse me, I seem to be lost. Could you tell me ?冠词 1-5 ACBAC 6-7 AC- Sure. You can take the No. 201 bus to get there. 动词1-5 BBCCA6-10 DCCBD11-15 BBDAC16-20 BBA. why do you come lateB. why you come late ( )30. The students like teachers can understand them.(((A. how I can get to the airport句子种类、简单句 1-5 AABDD 6-10 CBAAB 11-15BCBACB. where is the nearest hospital连词、主从复合句 1-5 ABDDB 6-10 BCABC11-15 CDBCC16-20 ABDBA 21-25 CBBDB 26-30 CACDA。
2020年中考选择题专项训练
2019年-2020年中考选择题专项训练题潮安区宝山中学刘奕璇一.选择题(共15小题,满分45分,每小题3分)1.中华民族的发明创造为人类文明进步作出了巨大贡献。
下列古代发明及应用中,不涉及化学变化的是()A.陶瓷烧制B.火药使用C.粮食酿酒D.甲骨刻字2.下列图标是化学实验室部分药品标签上的是()A.B.C.D.3.下列物品中的主要材料不属于有机合成材料的是()A.纯棉毛巾B.塑料桶C.橡胶轮胎D.尼龙绳4.下列做法与社会可持续发展理念相违背的是()A.将工业废水注入地下,治理水污染B.研发可降解的塑料,减少“白色污染”C.开发新能源,代替化石燃料D.推行自行车、公交车等出行方式,减少“碳”排放5.黄蜂的毒液呈碱性,若被黄蜂蜇了,涂抹下列物质可缓解疼痛的是()A.食盐水(pH≈7)B.牙膏(pH≈9)C.肥皂(pH≈10)D.米醋(pH≈3)6.下列有关金属及金属材料的说法正确的是()A.铁在潮湿的环境中比在干燥的环境中更容易生锈B.铝合金比纯铝硬度大,熔点高C.镁在氧气中燃烧,发出耀眼的白光,生成黑色固体D.我国的矿物储量比较丰富,所以废旧金属直接扔掉,没有必要回收7.下列实验操作正确的是()A.取用固体B.滴加液体C.稀释浓硫酸D.熄灭酒精灯8.下列实验方法错误的是()A.用灼烧闻气味的方法鉴别合成纤维和羊毛纤维B.配制一定溶质质量的分数的氯化钠溶液时可将称好的氯化钠倒入量筒中,搅拌溶解C.欲除去氯化钠溶液中的氢氧化钠,应向溶液中加入适量稀盐酸D.只需要用水即可鉴别碳酸钙、氢氧化钠和氯化钾9.善于归纳知识,有利于培养我们的科学素质.下列知识整理的内容有错误的一组是()A.化学与安全B.化学与生活油锅着火﹣﹣用锅盖盖灭进入地窖﹣﹣先做灯火实验降低水的硬度﹣﹣煮沸或蒸馏人体适量补钙﹣﹣防止患甲状腺疾病C.化学与能源D.化学与环保光合作用﹣﹣光能转变为化学能电池放电﹣﹣化学能转变为电能减少汽车尾气污染﹣﹣提倡使用公共交通等减少温室气体排放﹣﹣开发并使用太阳能等A.A B.B C.C D.D10.以下推理正确的是()A.酸中都含有氢元素,所以含有氢元素的化合物一定是酸B.碱性溶液能使酚酞试液变红,所以能使酚酞试液变红的溶液一定呈碱性C.中和反应生成盐和水,所以生成盐和水的反应一定是中和反应D.碳酸盐与盐酸反应放出气体,所以与盐酸反应放出气体的物质一定是碳酸盐11.“题10图”为四种物质的溶解度曲线。
2020届中考复习苏州市中考选择题和填空题组集训有配套答案(集训1~集训8)
苏州市中考数学选择题和填空题组集训选填题组集训(一)(时间:30分钟 分值:54分)一、选择题(每小题3分,共30分)下列各小题均有四个答案,其中只有一个是正确的.1. -16的相反数是( )A. 16 B. -6 C. 6 D. -162. 可燃冰,学名叫“天然气水合物”,是一种高效清洁、储量巨大的新能源.据报道,仅我国可燃冰预测远景资源量就超过了1000亿吨油当量.将1000亿用科学记数法可表示为( )A. 1×103 B. 1000×108 C. 1×1011 D. 1×10143. 某校规定学生的学期数学成绩满分为100分,其中研究性学习成绩占40%,期末卷面成绩占60%,小明的两项成绩(百分制)依次是80分,90分,则小明这学期的数学成绩是( )A. 80分B. 82分 C . 84分 D. 86分4. 下列计算正确的是( )A. x 2+3x 2=4x 4 ;B. x 2y ·2x 3=2x 6y ;C. (6x 3y 2)÷(3x)=2x 2;D. (-3x)2=9x 25. 下列各选项中,不是正方体表面展开图的是( )6. 如图,在△ABC 中,AB =AC ,BD 平分∠ABC 交AC 于点D ,AE ∥BD 交CB 的延长线于点E ,若∠E =35°,则∠BAC 的度数为( )A. 40°B. 45°C. 60°D. 70°第6题图 第9题图 第10题图 7. 已知二次函数y =x 2+2x -3,当自变量x 取m 时,对应的函数值小于0,设自变量分别取m -4,m +4时,对应的函数值为y 1,y 2,则下列判断正确的是( )A. y 1<0,y 2<0B. y 1<0,y 2>0C. y 1>0,y 2<0D. y 1>0,y 2>08. 一个盒子装有除颜色外其他均相同的2个红球和3个白球,现从中任取2个球,则取到的是一个红球、一个白球的概率为( )A. 25 B. 23 C. 35 D. 3109. 如图,直线DA 切⊙O 于A ,AB 是⊙O 的一条直径,点C 是⊙O 上异于A 、B 的任一点,则下列结论不一定正确的是( )A. ∠CAB =12∠COB ;B. AD ∥OC ;C. AD 2=DC ·DB ;D. AB ⊥AD 10. 如图,在平面直角坐标系中,若干个半径为2个单位长度,圆心角为60°的扇形组成一条连续的曲线,点P 从原点O 出发,沿这条曲线向右上下起伏运动,点在直线上的速度为每秒2个单位长度,点在弧线上的速度为每秒2π3个单位长度,则第2018秒时,点P 的坐标是( )A. (2018,0) B. (2018,-3) C. (2018,3) D. (2017,0)二、填空题(每小题3分,共24分)11. 计算:38+(12)-2=________. 12. 若关于x 的方程x 2+2x +m -5=0有两个相等的实数根,则m =________. 13. 如图,在▱ABCD 中,AB =3,AD =42,AF 交BC 于E ,交DC 的延长线于F ,且CF =1,则CE 的长为________.第13题图 第14题图 第15题图14. 如图,四边形ABCD 是菱形,∠A =60°,AB =2,扇形EBF 的半径为2,圆心角为60°,则图中阴影部分的面积是________.15. 已知如图所示,矩形ABCD ,P 为BC 上的一点,连接AP ,过D 点作DH ⊥AP 于H ,AB =22,BC =4,当△CDH 为等腰三角形时,则BP =________.16.如图,在距离铁轨200m 的B 处,观察从南通开往南京的“和谐号”动车,当动车车头在A 处时,恰好位于B 处的北偏东60°方向上.10 s 后,动车车头到达C 处,恰好位于B 处的西北方向上,则这列动车的平均车速是 ▲ m/s (结果保留根号).17.如图①,点P 从△ABC 的顶点B 出发,沿B →C →A 匀速运动到点A ,图②是点P 运动时,线段BP 的长度y 随时间x 变化的关系图象,其中M 为曲线部分的最低点,则△ABC 的面积是 ▲ .18.若关于x 的方程x 2-2ax +a -2=0的一个实数根为x 1≥1,另一个实数根x 2≤-1,则抛物线y =-x 2+2ax +2-a 的顶点到x 轴距离的最小值是 ▲ .选填题组集训(二)(时间:30分钟 分值:54分)一、选择题(每小题3分,共30分)下列各小题均有四个答案,其中只有一个是正确的. 1. -4的绝对值是( )A. -4B. 4C. 14D. -142. 如图,已知a 、b 、c 、d 四条直线,a ∥b ,c ∥d ,∠1=110°,则∠2等于( )A. 50°B. 70°C. 90°D. 110°第2题图 第6题图 第9题图3. “一带一路”的“朋友圈”究竟有多大?“一带一路”涉及沿线65个国家,总涉及人口约4400000000,将4400000000用科学记数法表示为( )A. 4.4×107B. 44×108C. 4.4×109D. 0.44×10104. 关于x 的不等式组⎩⎪⎨⎪⎧-x<1x -2≤0,其解集在数轴上表示正确的是( )5. 下列调查中,最适合采用全面调查(普查)方式的是( )A. 对河南省辖区内黄河流域水质情况的调查B. 对乘坐飞机的旅客是否携带违禁物品的调查C. 对一个社区每天丢弃塑料袋数量的调查D. 对河南电视台“华豫之门”栏目收视率的调查6. 如图是由一些相同的小正方体构成的几何体的三视图,则构成这个几何体的小正方体的个数是( )A. 3 B. 4 C. 5 D. 67. 若A(1,2),B(3,2),C(0,5),D(m ,5)是抛物线y =ax 2+bx +c 图象上的四点,则m 的值为( )A. -2 B. 2 C. -4 D . 48. 有6张看上去无差别的卡片,上面分别写着1,2,3,4,5,6.随机抽取一张后,放回并混在一起,再随机抽取一张,两次抽取的数字的积为奇数的概率是 ( ) A. 12 B. 14 C. 310 D. 169. 如图,平行四边形ABCD 的周长是26 cm ,对角线AC 与BD 交于点O ,AC ⊥AB ,E 是BC 的中点,△AOD 的周长比△AOB 的周长多3 cm ,则AE 的长度为( )A. 3 cmB. 4 cmC. 5 cmD. 8 cm10. 如图①,在等边△ABC 中,点D 是BC 边的中点,点P 为AB 边上的一个动点,设AP =x ,图①中线段DP 的长为y ,若表示y 与x 的函数关系的图象如图②所示,则等边△ABC 的面积为( )A. 4 B. 2 3 C . 12 D. 4 3二、填空题(每小题3分,共24分)11. 计算:(-1)2+(-3)0=________.12. 如图,D 是△ABC 的边BC 上一点,AB =4,AD =2,∠DAC =∠B.如果△ABD 的面积为15,那么△ACD 的面积为________.第10题图 第12题图 第14题图13. 已知点(m -1,y 1),(m -3,y 2)是反比例函数y =m x(m<0)图象上的两点,则y 1________y 2(填“>”、“=”或“<”).14. 如图,正方形ABCD 的边长为6,分别以A 、B 为圆心,6为半径画BD ︵、AC ︵,则图中阴影部分的面积为________.15. 如图,矩形ABCD 中,AB =6,BC =8,E 是BC 边上的一定点,P 是CD 边上的一动点(不与点C 、D 重合),M ,N 分别是AE 、PE 的中点,记MN 的长度为a ,在点P 运动过程中,a 不断变化,则a 的取值范围是________.第15题图 第16题图16.如图,已知P 是线段AB 的黄金分割点,且PA PB >.若1S 表示以PA 为一边的正方形的面积,2S 表示长是AB 、宽是PB 的矩形的面积,则1S 2S .(填“>”“=”或“<”)17.如图,在平面内,线段6,AB P =为线段AB 上的动点,三角形纸片CDE 的边CD 所在 的直线与线段AB 垂直相交于点P ,且满足PC PA =,若点P 沿AB 方向从点A 运动到点B ,则点E 运动的路径长为 .18.如图,已知点A 是一次函数1(0)2y x x =≥图像上一点,过点A 作x 轴的垂线,l B 是l 上 一点(点B 在点A 的上方),在AB 的右侧以AB 为斜边作等腰直角三角形ABC ,反比例 函数(0)k y k x=>的图像过点,B C ,若OAB ∆的面积为6,则ABC ∆的面积是 .选填题组集训(三)(时间:30分钟 分值:54分)一、选择题(每小题3分,共30分)下列各小题均有四个答案,其中只有一个是正确的.1. 下列各数中,最大的数是( )A. -2B. 7C. 0D. 3 2. 在人体血液中,红细胞的直径约为7.7×10-4 cm ,7.7×10-4用小数表示为( )A. 0.000077B. 0.00077C. -0.00077D. 0.00773. 下列计算正确的是( )A. (-2)2=-4;B. 23-3=2;C. (-2)×(-5)=-10 ;D. 16=44. 在学校开展的“争做最优秀中学生”的演讲比赛中,编号分别为1,2,3,4,5五位同学的最后成绩如下表所示:参赛者编号1 2 3 4 5 成绩/分 96 88 86 93 86 A. 96,88 B. 86,86 C. 88,86 D. 86,885. 如图,A ,B 是双曲线y =k x上的两点,过A 点作AC ⊥x 轴,交OB 于D 点,垂足为C.若△ADO 的面积为1,D 为OB 的中点,则k 的值为( )A. 43B. 83C. 3D. 4第5题图 第6题图 第9题图 第10题图6. 如图是由6个相同的小正方体搭成的几何体,那么这个几何体的俯视图是( )7. 已知二次函数y =-2x 2+4x -3,如果y 随x 的增大而减小,那么x 的取值范围是( )A. x ≥1B. x ≥0C. x ≥-1D. x ≥-28. 布袋中有红、黄、蓝三种颜色的球各一个,从中摸出一个球之后不放回布袋,再摸第二个球,这时得到的两个球的颜色中有“一红一黄”的概率是( ) A. 16 B. 29 C. 13 D. 239. 如图,在Rt △ABC 中,∠C =90°,AC =4,BC =3,点D 是AC 的中点,连接BD ,按以下步骤作图:①分别以点B 、D 为圆心,大于12BD 的长为半径作弧,两弧相交于点P 和点Q ;②作直线PQ 交AB 于点E ,交BC 于点F ,则BF =( )A. 56B. 1C. 136D. 5210. 如图,矩形ABCD 中,AB =3,BC =4,动点P 从A 点出发,按A →B →C 的方向在AB 和BC 上移动,设PA =x ,点D 到直线PA 的距离为y ,则y 关于x 的函数图象大致是( )二、填空题(每小题3分,共24分)11. 计算:|-2|-9=________.12. 如图,将一块直角三角板的直角顶点放在直尺的一边上,如果∠1=50°,那么∠2的度数是________.第12题图 第14题图 第15题图13. 不等式组⎩⎪⎨⎪⎧x +2>12x -1≤8-x 的最大整数解是________. 14. 如图,在扇形AOB 中,∠AOB =90°,点C 为OA 的中点,CE ⊥OA 交AB ︵于点E ,以点C 为圆心,OA 的长为直径作半圆交OE 于点D.若OA =4,则图中阴影部分的面积为________.15. 如图,在矩形ABCD 中,AB =2,AD =6,E 、F 分别是线段AD 、BC 上的点,连接EF ,使四边形ABFE 为正方形,若点G 是AD 上的动点,连接FG ,将矩形沿FG 折叠使得点C 落在正方形ABFE 的对角线所在的直线上,对应点为P ,则线段AP 的长为_______16.如图,已知反比例函数2y x=在第一象限内的图像上一点A ,且4,OA AB x =⊥轴,垂足为B ,线段OA 的垂直平分线交x 轴于点C (点C 在点B 的左侧),则ABC ∆的周长等于 .17.如图,AOB ∆为等腰三角形,顶点A 的坐标为(3,4),底边OB 在x 轴正半轴上.将AOB ∆绕点O 按逆时针方向旋转一定角度后得A OB ''∆,点A 的对应点A '在x 轴负半轴上,则点B 的对应点B '的坐标为 .18.如图,平面直角坐标系中,已知,A B 两点的坐标分别为(2,0)(0, 23,点P 是AOB ∆外 接圆上的一点,且45BOP ∠=︒,则点P 的坐标为 .选填题组集训(四)(时间:30分钟 分值:54分)一、选择题(每小题3分,共30分)下列各小题均有四个答案,其中只有一个是正确的.1. 下列各数中为无理数的是( ) A. 0.010010001 B. 12C. πD. 4 2. 如图所示的几何体的主视图为( )3. 一元二次方程(x +6)2-9=0的解是( )A. x 1=6,x 2=-6B. x 1=x 2=-6C. x 1=-3,x 2=-9D. x 1=3,x 2=-94. 如图,直线l 1∥l 2,CD ⊥AB 于点D ,∠1=50°,则∠BCD 的度数为( )A. 50°B. 45°C. 40°D. 30°第4题图 第7题图 第9题图5. 不等式组⎩⎪⎨⎪⎧-x +1≤014x -1<0的所有整数解的和是( )A. 6 B. 7 C. 8 D. 9 6. 下列选项中正确的是( )A. “任意画一个三角形,其内角和是360°”是必然事件B. 一组数据3,6,6,7,9的中位数是6C. 从2000名学生中选200名学生进行抽样调查,样本容量为2000D. 随机掷一枚均匀的硬币10次,正面朝上的次数一定为5次7. 二次函数y =ax 2+bx +c 的图象在平面直角坐标系中的位置如图所示,则一次函数y =ax +b 与反比例函数y =c x 在同一平面直角坐标系中的图象可能是( )8. 某校组织九年级学生参加中考体育测试,共租3辆客车,分别编号为1、2、3,李军和赵娟两人可任选一辆车乘坐,则两人同坐2号车的概率为( ) A. 19 B. 16 C. 13 D. 129. 如图,AP 为⊙O 的切线,P 为切点,若∠A =20°,C 、D 为圆周上两点,且∠PDC =60°,则∠OBC 等于( )A. 55° B. 65° C. 70° D. 75°第10题图10. 观察下列一组图形,第1个图形中共有4个三角形,第2个图形中共有8个三角形,…,按此规律,则第2018个图形中三角形的个数是( )A. 2018B. 4036C. 6054 D . 8072二、填空题(每小题3分,共24分)11. 计算:(-1)2018+(-2)3=________. 12. 已知函数y =-1x,当自变量的取值为-1<x<0或x ≥2,函数值y 的取值范围为________. 13. 若一个圆锥的底面圆的半径为2,母线长为6,则该圆锥侧面展开图的圆心角是________.14. 如图,边长为6的正方形ABCD 和边长为8的正方形BEFG 排放在一起,O 1和O 2分别是两个正方体的对称中心,则阴影部分的面积为________.第14题图 第15题图 第16题图15. 如图,在Rt △ABC 中,∠ACB =90°,AB =5,AC =3,点D 是BC 上一动点,连接AD ,将△ACD沿AD 折叠,点C 落在点C ′,连接C ′D 交AB 于点E ,连接BC ′,当△BC ′D 是直角三角形时,DE 的长为________.16.小亮早晨从家骑车去学校,先走下坡路,然后走上坡路,去时行程情况如图.若返回时,他的下坡和上坡速度仍保持不变,那么小亮从学校按原路返回家用的时间是______分.17.如图,己知△ABC 中,90303C A AC ∠=︒∠=︒=,,,动点D 在边AC 上,以BD 为边作等边△BDE (点E 、A 在BD 的同侧),在点D 从点A 移动至点C 的过程中,点E 移动的路线长为__________.(第17题)(第18题)18.如图,菱形ABCD 的三个顶点在二次函数y =ax 2-2ax +32(a <0)的图象上,点A ,B 分别是该抛物线的顶点和抛物线与y 轴的交点,则点D 的坐标为__________.选填题组集训(五)(时间:30分钟 分值:54分)一、选择题(每小题3分,共30分)下列各小题均有四个答案,其中只有一个是正确的.1. 冰箱冷藏室的温度零上5 ℃,记作+5 ℃,保鲜室的温度零下7 ℃,记作( )A. 7 ℃B. -7 ℃C. 2 ℃D. -12 ℃2. 河南是中华民族与中华文明的主要发祥地之一,中国古代四大发明中的指南针、造纸术、火药三大技术均发明于河南,河南省的面积约为16.7万平方千米,16.7万用科学记数法表示为( )A.1.67×10 B. 1.67×104 C. 1.67×105 D. 1.67×10-53. 将一副三角板,如图所示放置,使点A 落在DE 边上,BC ∥DE ,AB 与EF 相交于点H ,则∠AHF 的度数为( )A. 60° B. 65° C. 70° D. 75°第3题图 第6题图 第9题图 第10题图4. 11名同学参加数学竞赛初赛,他们的得分互不相同,按从高分录到低分的原则,取前6名同学参加复赛,现在小明同学已经知道自己的分数,如果他想知道自己能否进入复赛,那他还需知道所有参赛学生成绩的( )A. 平均数B. 中位数C. 众数D. 方差5. 将二次函数y =x 2+1的图象向上平移2个单位,再向右平移1个单位,平移后的函数解析式为( )A. y =(x -1)2-1B. y =(x +1)2-1C. y =(x +1)2+3D. y =(x -1)2+36. 如图是某几何体的三视图,根据图中所标的数据求得该几何体的体积为( )A. 136πB. 236πC. 132πD. 120π7. 甲、乙两个不透明的袋子中装有只有颜色不同的小球,甲袋里有红、黑色球各一个,乙袋里有红、黑、白色球各一个,分别从这两个袋中任取一球,那么取出的两个球颜色相同的概率为( )A. 16B. 13C. 12D. 238. 若式子k -1+(k -1)0有意义,则一次函数y =(1-k)x +k -1的图象可能是( )9. 如图,▱ABCD 中,∠ABC 和∠BCD 的平分线交于AD 边上一点E ,且BE =4,CE =3,则AB 的长是( )A. 52 B. 3 C. 4 D. 5 10. 如图,等腰Rt △ABC 中,∠B =90°,AB =1,将Rt △ABC 绕点C 按顺时针方向旋转,得到Rt △A ′B ′C ,且B 、C 、A ′三点共线,则边AB 扫过的面积(图中阴影部分)是( )A. 3π4+12;B. 3π4-12;C. 9π8;D. 3π8二、填空题(每小题3分,共24分)11. 计算:25+3-64=________.12. 如图,练习本中的横格线都平行,且相邻两条横格线间的距离都相等,同一条直线上的三个点A 、B 、C 都在横格线上,若线段AB =4 cm ,则线段BC =________cm .第12题图 第13题图 第15题图13. 如图,在平面直角坐标系中,点B 在y 轴上,点C 在反比例函数y =-6x的图象上,则菱形OABC 的面积为________.14. 已知关于x 的方程2x +m x -2=3的解是正数,则m 的取值范围是________. 15. 如图,在Rt △ABC 中,∠C =90°,翻折∠C ,使点C 落在斜边AB 上某一点D 处,折痕为EF(点E 、F 分别在边AC 、BC 上),若以C 、E 、F 为顶点的三角形与以A 、B 、C 为顶点的三角形相似且AC =3,BC =4时,则AD 的长为________。
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31.5 万件,处分 25.4 万人,包括省部干部 20 人,厅局级干部 0.2 万人。
这表明( )
A.加大反腐力度成为我国当前中心工作
B.法律是由国家制定或认可的行为规范
C.每个公民都平等享有法律规定的权利
D.任何人都没有超越宪法和法律的特权
21.2019 年 12 月 23 日,××市××区人民法院公开宣判被告人×××等 20
人犯黑社会性质组织罪案件,依法判处该团伙组织领导者×××有期徒刑 20
年,剥夺政治权利 3 年,并处没收个人全部财产,其他黑社会性质组织成员
判处 2 年 6 个月至 19 年有期徒刑。上述材料表明我国法律( )
①制裁违法犯罪行为
②是由国家制定或认可的
③规范社会成员的行为
④保障社会成员的一切权利
A.①②
绕“珍爱生命,安全伴我行”开展主题活动。下列符合这一主题的有(
)
①参加学校开展的应急疏散演练活动
②独自到无安全防护设施的河边游泳
③认真学习预防一氧化碳中毒的知识
④瞒着父母单独外出去会见陌生网友
A.①②
B.①③
C.②④
D.③④
如果没有您爱的滋润,怎么会绽放那么多美好的灵魂之花!
K12 中考教育
12.列夫·托尔斯泰曾说过:“通往幸福的最错误的途径,莫过于名利、乐
C.挫折时人生的宝贵财富,越多越好
D.发掘自身的力量主要依靠他人支持
15.读漫画《看客》。我们应当对漫画中的旁观者说( )
A.拒绝平凡,时时创造伟大
B.战胜挫折,培养意志坚强
C.牺牲自我,实现生命价值
D.拒绝冷漠,营造和谐社会
如果没有您爱的滋润,怎么会绽放那么多美好的灵魂之花!
K12 中考教育
16.“时代楷模”钟扬援藏 16 年,足迹遍布西藏最偏远、最艰苦的地区,率
A.①②
B.①③
C.②④
D.③④
5.应急车道,是专门供工程救险、消防救援、医疗救护或者民警执行紧急公
务等处理应急事务车辆使用得车道,也被称为“生命通道”。我们要保持“
生命通道”畅通,是因为( )
A.生命短暂,要尽情享受生命
B.生命至上,要保障及时救援
C.生命是独特的,人生道路不同
D.生命是脆弱的,必须自立自强
A.珍惜自己生命
B.善待他人生命
C.培养坚强意志
D.履行法律义务
8.王某中考失利,整天没精打采。母亲责备了几句,她竟然离家出走企图自
杀。这件事提醒我们应当( )
①增强自信,勇于面对挫折
②敬畏生命,不漠视自己的生命
③珍视生命,轻视学习成绩
④关怀他人,养成健康生活方式
A.①②
B.①③
C.②④
D.③④
9.守护生命,我们要关心身体的状况,养成健康的生活方式。下列做法符合
约 60%的人会选择“不干了或忍气吞声”。对此,你给农民工的正确建议是
()
A.到当地政府部门静坐抗议
B.到劳动仲裁机构寻求帮助
C.可通过打击报复维护权益
D.通过网络暴力来发泄不满
27.李某因谎报险情,被公安机关拘留;某出版社未经作者同意发表其作品,
作者将该出版社告上法庭。李某、某出版社的行为分别属于( )
B.①③
C.②④
D.③④
22.下列法律中,属于我国对未成年人给予特殊关爱和保护的专门性法律的
有( )
①婚姻法
②未成年人保护法
③义务教育法
④预防未成年人犯罪法
A.①②
B.①③
C.②④
D.③④
23.下列生活情境的做法与“四大保护”的要求对应一致的有( )
选项 ① ② ③ ④
四道防线 家庭保护 学校保护 社会保护 司法保护
A.刑事违法行为、民事违法行为
B.民事违法行为、行政违法行为
C.行政违法行为、民事违法行为
D.行政违法行为、刑事违法行为
28.下列四组图示,正确反映违法与犯罪关系的是( )
如果没有您爱的滋润,怎么会绽放那么多美好的灵魂之花!
K12 中考教育
29.因向未成年人售卖烟草制品,一商家吃了全国首张此类罚单。××百货
×以实际行动诠释了( )
A.生命的韧性
B.诚信的品质
C.友善的态度
D.团结的力量
14.霍金 21 岁患渐冻症,不能说话,全身仅有三根手指能动。在如此艰难的
情况下,他依然坚持进行科学研究,成为最伟大的物理学家之一。霍金的事
迹告诉我们( )
A.每个人都可以正确面对人生的挫折
B.正确对待挫折可以发掘生命的力量
中考道德与法治单项选择题专项练习(一)答案
如果没有您爱的滋润,怎么会绽放那么多美好的灵魂之花!
K12 中考教育
1-5.BCBDB 6-10.CBADC 11-15.BDABD 16-20.CDABD 21-25.BCDDA 26-30.BCDBB
如果没有您爱的滋润,怎么会绽放那么多美好的灵魂之花!
这一要求的有( )
①通宵达旦,观看娱乐节目
②抽烟酗酒,消除内心烦恼
③按时作息,坚持体育锻炼
④荤素搭配,注重膳食营养
A.①②
B.①③
C.②④
D.③④
10.突发火灾时,正确的逃生建议是( )
A.四处奔跑,慌不择路
B.返回原处,捡拾钱物
C.掩鼻低身,有序撤离
D.乘坐电梯,速度第一
11.2020 年 3 月 25 日全国第 25 个“中小学生安全教育日”。长春市某校围
6.读漫画《停车》。漫画中的乘客应当( )
①捍卫权利,维护权利
②尊法守法,遵守规则
③珍惜权利,放弃义务
④珍爱生命,敬畏生命
A.①②
B.①③
C.②④
D.③④
7.榆树 14 岁女孩小雪被严重烧伤,因家庭经济困难治疗受阻,长春市爱心
如果没有您爱的滋润,怎么会绽放那么多美好的灵魂之花!
K12 中考教育
市民筹集善款七十多万元救助小雪。爱心市民的义举主要体现了( )
④我国落实宪法核心价值追求
A.①②
B.①③
C.②④
D.③④
3.(2019 长春中考)读图《五四精神》。长春市某中学围绕图片内容召开
班会,下列适合做本次班会主题的有( )
①弘扬中国精神 共圆民族梦想
②勤于规划人生 聚焦个人发展
③承担历史使命 投身伟大实践 ④制定政策法规 铸就民族辉煌
A.①②
B.①③
C.②④
领团队在青藏高原为国家收集了数千万颗植物种子。科学家钟扬的事迹启示
我们( )
A.实现生命的意义,必须牺牲个人的利益
B.只有到最艰苦的地方,才能活出生命的精彩
C.伟大在于创造和贡献,要让有限的生命焕发光彩
D.只有作出惊天动地的壮举,才能实现生命的价值
17.我们的父母是社会的劳动者,有劳动法等法律法规来保护他们的合法权
D.③④
4.(2019 长春模拟)读《2014-2018 年吉林省城镇和农村常住居民人均可支
配收入》情况。对信息认识正确的有( )
如果没有您爱的滋润,怎么会绽放那么多美好的灵魂之花!
K12 中考教育
①我省已经实现城乡协调发展
②我省人民生活实现共同富裕
③我省城市与农村发展不平衡
④我省城乡居民收入持续增长
享和奢华生活。”这启示我们应当( )
A.关注精神发育,保持物质贫乏 B.追求物质富足,进行物质攀比
C.杜绝物质追求,追求精神生活 D.积极养护精神,满足精神需求
13.×××,××市肢残人协会主席。他从小因为身患小儿麻痹落下终身残
疾,却凭借自强不息的精神,克服身体上的种种障碍,从一无所有开始创业
。目前他所创办的××市××职业技术学校拥有全日制在校学生千余人。××
④可以解决社会生活中的所有问题
A.①②
B.①③
C.②④
D.③④
19.法律区别于道德等行为规范的最主要特征是( )
A.由国家制定或认可
B.由国家强制力保证实施
C.规范全体社会成员的行为 D.对全体社会成员具有普遍约束力
如果没有您爱的滋润,怎么会绽放那么多美好的灵魂之花!
K12 中考教育
20.2019 年上半年,全国纪检监察机关共接受信访举报 160.9 万件次,立案
益;道路上的行人、车辆都必须遵守交通法规;盗窃、抢劫等违法犯罪行动
会受到法律制裁……这表明( )
A.法律指导着人们未来的生活
B.法律是统治阶段意志的体现
C.法律只对违法的人有约束力
D.我们的生活与法律息息相关
18.读图,对图所反映的主题认识正确的有 ( )
①助推中国梦的实现
②强调依法治国、法律至上
③是国家治理现代化的唯一标志
K12 中考教育
中考道德与法治单项选择题专项练习(一)
一、单项选择题(共 60 分,每小题 2 分,每题只有一个正确选项。)
1.(2019 长春中考)一名外国人以收集资料做调研为由,请我国某公民为
其拍摄国内军事基地照片,并承诺给予高额报酬。该公民的正确选择应该是
()
A.提供照片 B.及时举报
C.索要高价
的店主××向××市场监督管理局上缴了一笔 3 万元的罚款,全国首宗向未
成年人非法售烟案结案。该案中商家的行为属于( )
①一般违法行为 ②严重违法行为 ③行政违法行为 ④民事违法行为
A.①②
B.①③
C.②④
D.③④
30.犯罪的最本质特征是( )
A.社会危害性 B.严重社会危害性 C.刑事违法性 D.应受刑罚处罚性
生活情景 教育部印发《关于开展校园欺凌专项治理的通知》 公安机关对伤害女儿的刘某开出了《反家庭暴力告诫书》 国家网信办开展“护苗 2019·网上行动”,净化网络环境 人民法院不公开审理未成年人违法犯罪案件