1-3练习
2022-2023学年北师大版九年级数学上册《1-3正方形的性质与判定》同步练习题(附答案)

2022-2023学年北师大版九年级数学上册《1.3正方形的性质与判定》同步练习题(附答案)一.选择题1.正方形具有而矩形不一定具有的性质是()A.对角线相等B.四个角都是直角C.对角线互相垂直D.两组对边分别平行2.下列说法正确的是()A.正方形既是矩形,又是菱形B.有一个内角是直角的四边形是矩形C.两条对角线互相垂直平分的四边形是正方形D.对角线互相垂直的四边形是菱形3.如图,已知四边形ABCD是平行四边形,下列结论正确的是()A.当AB=BC时,四边形ABCD是矩形B.当AC⊥BD时,四边形ABCD是矩形C.当AC⊥BD时,四边形ABCD是菱形D.当∠ABC=90°时,四边形ABCD是正方形4.在正方形ABCD中,BF平分∠DBC交CD于F点,则∠DBF的度数是()A.15°B.22.5°C.30°D.45°5.如图,点E、F分别是正方形ABCD的边CD、BC上的点,且CE=BF,AF、BE相交于点G,下列结论不正确的是()A.AF=BE B.AF⊥BEC.AG=GE D.S△ABG=S四边形CEGF6.如图,点E,F,P,Q分别是正方形ABCD的四条边上的点,并且AF=BP=CQ=DE,则下列结论不一定正确的是()A.∠AFP=∠BPQB.EF∥QPC.四边形EFPQ是正方形D.四边形PQEF的面积是四边形ABCD面积的一半7.如图1是由一根细铁丝围成的正方形,其边长为1.现将该细铁丝围成一个三角形(如图2所示),则AB的长可能为()A.3.0B.2.5C.2.0D.1.58.如图,已知正方形ABCD的边长为4,P是对角线BD上一点,PE⊥BC于点E,PF⊥CD于点F,连接AP,EF.给出下列结论:①PD=EC;②四边形PECF的周长为8;③AP=EF;④EF的最小值为2.其中正确结论有几个()A.1B.2C.3D.49.如图,在平面直角坐标系xOy中,P(4,4),A、B分别是x轴正半轴、y轴正半轴上的动点,且△ABO的周长是8,则P到直线AB的距离是()A.4B.3C.2.5D.210.如图四块同样大小的正方形纸片,围出一个菱形ABCD,一个小孩顺次在这四块纸片上轮流走动,每一步都踩在一块纸片的中心,则这个小孩走的路线所围成的图形是()A.平行四边形B.矩形C.菱形D.正方形二.填空题11.如图,已知阴影部分是一个正方形,AB=4,∠B=45°,则此正方形的面积为.12.添加一个条件,使矩形ABCD是正方形,这个条件可能是.13.如图,平行四边形ABCD的对角线互相垂直,要使ABCD成为正方形,还需添加的一个条件是(只需添加一个即可)14.边长为4的一个正方形和一个等边三角形如图摆放,则△ABC的面积为.15.如图,正方形ABCD内部有一个等边△ABE,则∠DAE=°.16.如图,正方形ABCD的顶点B、C都在直角坐标系的x轴上,点D的坐标是(2,3),则点B的坐标是.17.如图,点D,E,F分别是△ABC三边的中点,连接AD,DE,DF,有下列结论:①四边形AEDF一定是平行四边形;②若∠BAC=90°,则四边形AEDF是矩形;③若AD平分∠BAC,则四边形AEDF是正方形;④若AD⊥BC,则四边形AEDF是菱形.其中正确的有.(填序号)三.解答题18.如图,在正方形ABCD中,E是BC的中点,F是CD上一点,且AB=4,CF=1.(1)求AE,EF,AF的长;(2)求证:∠AEF=90°.19.如图,在正方形ABCD中,PD=QC,求证:PB=AQ,BP⊥AQ.20.四边形ABCD为正方形,点E为线段AC上一点,连接DE,过点E作EF⊥DE,交线段BC于点F,以DE、EF为邻边作矩形DEFG,连接CG.(1)如图,求证:矩形DEFG是正方形;(2)若AB=2,CE=2,求CG的长.参考答案一.选择题1.解:∵正方形的性质为:对边平行且相等,四条边相等,四个角为直角,对角线互相垂直平分,相等,且每条对角线平分一组对角,矩形的性质为:对边平行且相等,四个角为直角,对角线互相平分,相等,∴正方形具有而矩形不一定具有的性质是:对角线互相垂直,故选:C.2.解:A.正方形既是矩形,又是菱形,正确,符合题意;B.有一个内角是直角的四边形是矩形,错误,不符合题意;C.两条对角线互相垂直平分的四边形是正方形,错误,不符合题意;D.对角线互相垂直的四边形是菱形,错误,不符合题意.故选:A.3.解:A、∵四边形ABCD是平行四边形,又∵AB=BC,∴四边形ABCD是菱形,故本选项不符合题意;B、∵四边形ABCD是平行四边形,又∵AC⊥BD,∴四边形ABCD是菱形,故本选项不符合题意;C、∵四边形ABCD是平行四边形,又∵AC⊥BD,∴四边形ABCD是菱形,故本选项符合题意;D、∵四边形ABCD是平行四边形,又∵∠ABC=90°,∴四边形ABCD是矩形,故本选项不符合题意;故选:C.4.解:∵BD是正方形ABCD的对角线,∴∠DBC=45°.∵BF平分∠DBC,∴∠DBF=∠DBC=22.5°.故选:B.5.解:∵四边形ABCD是正方形,∴AB=BC,∠ABC=∠C=90°,∵BF=CE,∴△ABF≌△BCE(SAS),∴AF=BE,∠BAG=∠CBE,∴选项A不符合题意;∵∠ABG+∠CBE=∠ABC=90°,∴∠BAG+∠ABG=90°,∴∠AGB=90°,∴AF⊥BE,∴选项B不符合题意;∵△ABF≌△BCE,∴S△ABF=S△BCE,∴S△ABF﹣S△BFG=S△BCE﹣S△BFG,∴S△ABG=S四边形CEGF,∴选项D不符合题意;∵无法证明AG=GE,∴选项C符合题意;故选:C.6.解:∵四边形ABCD是正方形,∴∠A=∠B=∠C=∠D=90°,AB=BC=CD=AD,∵AF=BP=CQ=DE,∴DF=CE=BQ=AP,∴△APF≌△DFE≌△CEQ≌△BQP(SAS),∴EF=FP=PQ=QE,∠AFP=∠BPQ,故A选项正确,不符合题意;∵EF=FP=PQ=QE,∴四边形EFPQ是菱形,∴EF∥PQ,故B选项正确,不符合题意;∵△APF≌△BQP,∴∠AFP=∠BPQ,∵∠AFP+∠APF=90°,∴∠APF+∠BPQ=90°,∴∠FPQ=90°,∴四边形EFPQ是正方形.故C选项正确,不符合题意;∵四边形PQEF的面积=EF2,四边形ABCD面积=AB2,若四边形PQEF的面积是四边形ABCD面积的一半,则EF2=AB2,即EF=AB.若EF≠AB,则四边形PQEF的面积不是四边形ABCD面积的一半,故D选项不一定正确,符合题意.故选:D.7.解:∵由一根细铁丝围成的正方形,其边长为1,∴该细铁丝的长度为4.∴AC+BC+AB=4,∴AC+BC=4﹣AB.∵AC+BC>AB,∴4﹣AB>AB,∴AB<2.∴AB的长可能为1.5,故选:D.8.解:如图,连接PC,①∵正方形ABCD的边长为4,P是对角线BD上一点,∴∠ABC=∠ADC=∠BCD=90°,∠PDC=∠DBC=45°,AB=BC=CD=AD=4,又∵PE⊥BC,PF⊥CD,∴∠PEC=∠PEB=∠PFC=∠PFD=90°=∠BCD,∴∠DPF=∠PDF=∠BPE=∠DBC=45°,∴PF=DF,PE=BE,即△PDF和△BPE均为等腰直角三角形,∴PD=PF,∵∠PEC=∠PFC=∠BCD=90°,∴四边形PECF是矩形,∴CE=PF=DF,PE=FC,∴PD=CE,故①正确;②由①知:PE=BE,且四边形PECF为矩形,∴四边形PECF的周长=2CE+2PE=2CE+2BE=2(CE+BE)=2BC=2×4=8,故②正确;③∵四边形PECF为矩形,∴PC=EF,∵四边形ABCD为正方形,∴AD=CD,∠ADP=∠CDP,在△ADP和△CDP中,,∴△ADP≌△CDP(SAS),∴AP=PC,∴AP=EF,故③正确;④由③得:EF=PC=AP,∴当AP最小时,EF最小,∴当AP⊥BD时,垂线段最短,即AP=BD=2时,EF的最小值等于2;故④错误;综上,①②③正确.故选:C.9.解:方法一:如图,过点P作PC⊥x轴,PD⊥y轴,垂直分别为C,D,设OB=a,OA=b,AB=c,P到直线AB的距离是h,∵△ABO的周长是8,∴a+b+c=8,∴a+b=8﹣c,∴a2+2ab+b2=64﹣16c+c2根据勾股定理得:a2+b2=c2,∴ab=32﹣8c,∵S△P AB=4×4﹣ab﹣4(4﹣b)﹣4(4﹣a)=2(a+b)﹣ab=2(8﹣c)﹣(32﹣8c)=16﹣2c﹣16+4c=2c,∵S△P AB=×c•h,∴2c=×c•h,∴h=4.∴P到直线AB的距离为4.方法二:如图,过点P作PC⊥x轴,PD⊥y轴,垂直分别为C,D,∵P(4,4),∴四边形CODP是边长为4的正方形,∴PC=PD=OC=OD=4,∵A、B分别是x轴正半轴、y轴正半轴上的动点,∴将△P A′D沿P A′折叠得到△P A′E,延长A′E交y轴于点B,∴∠P A′D=∠P A′E,PE=PD,A′D=A′E,∠PDA′=∠PEA′=90°,∴PE=PC,在Rt△PEB和Rt△PCB中,,∴Rt△PEB≌Rt△PCB(HL),∴BE=BC,∵△A′BO的周长是8,∴A′O+BO+A′B=A′O+BO+BE+A′E=A′O+BO+BC+A′D=CO+DO=8,∴△A′BO符合题意中的△ABO,∴P到直线AB的距离PE=4,故选:A.10.解:如图,根据题意,顺次连接四个正方形的中心,所构成的图形是正方形,所以这个小孩走的路线所围成的图形是正方形.故选:D.二.填空题11.解:∵阴影部分是一个正方形,∴∠ACB=90°,∵∠B=45°,∴△ABC是等腰直角三角形,∴AC===2,∴正方形的面积为(2)2=8,故答案为:8.12.解:AB=AD(或AC⊥BD答案不唯一).理由:∵四边形ABCD是矩形,又∵AB=AD,∴四边形ABCD是正方形.或∵四边形ABCD是矩形,又∵AC⊥BD,∴四边形ABCD是正方形,故答案为:AB=AD(或AC⊥BD答案不唯一).13.解:条件为∠ABC=90°或AC=BD,理由是:∵平行四边形ABCD的对角线互相垂直,∴四边形ABCD是菱形,∵∠ABC=90°或AC=BD,∴四边形ABCD是正方形,故答案为:∠ABC=90°或AC=BD.14.解:过C作CD⊥AB交AB延长线与D,如图:∵∠CBD=180﹣90°﹣60°=30°,∠D=90°,∴CD=BC=×4=2,∴△ABC的面积为AB•CD=×4×2=4,故答案为:4.15.解:∵四边形ABCD是正方形,∴∠DAB=90°,∵△ABE是等边三角形,∴∠DAE=∠DAB﹣∠EAB=90°﹣60°=30°,故答案为:30.16.解:∵四边形ABCD为正方形,∴AD=CD=BC=AB,∵点D的坐标是(2,3),∴AD=CD=BC=3,OC=2,∴OB=1,∴点B的坐标是(﹣1,0).故答案为:(﹣1,0).17.解:①∵点D、E、F分别是△ABC三边的中点,∴DE、DF为△ABC的中位线,∴ED∥AC,且ED=AC=AF;DF∥AB,且DF=AB=AE,∴四边形AEDF一定是平行四边形,故正确;②若∠BAC=90°,则平行四边形AEDF是矩形,故正确;③若AD平分∠BAC,则∠BAD=∠CAD,∵DE∥AC,∴∠CAD=∠ADE,∴∠BAD=∠ADE,∴AE=DE,又∵四边形AEDF是平行四边形,∴四边形AEDF是菱形,∴不能判定四边形AEDF是正方形,故错误;④若AD⊥BC,则AD垂直平分BC,∴AB=AC,∵AB=AC,AD⊥BC,∴AD平分∠BAC,即∠BAD=∠CAD,∵DE∥AC,∴∠CAD=∠ADE,∴AE=DE,又∵四边形AEDF是平行四边形,∴四边形AEDF是菱形,故正确.故答案为:①②④.三.解答题18.(1)解:∵四边形ABCD是正方形,∴∠B=∠C=∠D=90°,∵E为AB的中点,∴BE=CE=2,∴AE===2,EF===,AF===5;(2)证明:∵AE2+EF2=20+5=25,AF2=52=25,∴AE2+EF2=AF2,∴∠AEF=90°.19.证明:由题意可得:AD=AB=BC=DC,∠BAD=∠ADC=∠ABC=∠C=90°,∵PD=QC,∴AP=DQ,在△ADQ和△BAP中,,∴△ADQ≌△BAP(SAS),∴BP=AQ,∠APB=∠AQD,∵∠DAQ+∠AQD=90°,∴∠DAQ+∠APB=90°,∴BP⊥AQ,∴BP=AQ,BP⊥AQ.20.(1)证明:如图1,作EP⊥CD于P,EQ⊥BC于Q,∵∠DCA=∠BCA,∴EQ=EP,∵∠QEF+∠FEC=45°,∠PED+∠FEC=45°,∴∠QEF=∠PED,在Rt△EQF和Rt△EPD中,,∴Rt△EQF≌Rt△EPD(ASA),∴EF=ED,∴矩形DEFG是正方形;(2)解:如图2,在Rt△ABC中,AB=2,∴AC=AB=4,∵CE=2,∴AE=4﹣2=2,∴AE=CE,∴点F与C重合,此时△DCG是等腰直角三角形,∴CG=CE=2.。
《成本管理会计》(1-3)练习答案

《成本会计》第1~3章练习一、填空题1、产品的制造成本是指为制造产品而发生的各种生产费用的总和,包括直接材料、直接人工和制造费用。
在制造成本法下,期间费用不计入产品成本,而是直接计入当期损益。
2、在成本会计的各项内容中,成本核算是成本会计的核心。
3、企业根据需要可将“生产成本”账户分设_基本生产成本_和_辅助生产成本_两个明细账户。
4、“制造费用”账户是核算企业为组织和管理生产而发生的,应该计入产品成本,但不能专设成本项目的各项生产费用。
5、各种要素费用发生后,对于直接用于产品生产、专设成本项目的费用,应单独记入生产成本总账账户。
6、直接生产产品的生产工人工资和根据生产工人工资按规定比例提取的职工福利费,应记入直接人工成本项目。
7、专设的销售部门人员工资应记入_销售费用(营业费用)_总账账户和所属明细账。
8、辅助生产费用的分配方法主要有直接分配法、顺序分配法、交互分配法、代数分配法和计划成本分配法。
9、废品按能否修复分为可修复废品和不可修复废品。
10、如果辅助生产的制造费用,不是通过“制造费用”账户核算,则应全部借记“生产成本—辅助生产成本”账户。
11、按计划分配率方法,“制造费用”账户期末有余额,就是实际发生额与计划分配额的差额,一般应在年末调整计入12月份的产品成本。
二、单项选择题1、下列应计入产品生产成本的费用是(C)A、广告费B、租入办公设备的租赁费C、生产工人工资D、利息支出2、制造业产品成本是指(B)A、生产费用、销售费用、管理费用、财务费用之和B、生产一定种类和数量的产品所支出的各种生产费用之和C、生产费用与管理费用之和D、生产费用与管理费用、财务费用之和3、下列应计入产品成本的费用是(B)A、职工教育经费B、生产车间机器设备的修理费C、技术服务部门设备的修理费D、仓库设备的修理费4、成本理论构成的内容是(B)A、C+V+MB、C+VC、V+MD、C+M5、按照医务及生活福利部门人员的工资额提取的职工福利费,实际工作中应计入(C)A、应付福利费B、制造费用C、管理费用D、辅助生产成本6、基本生产车间计提的固定资产折旧费,应借记(C)账户。
英语九年级上册Units 1-3语法归纳同步练习-鲁教版(五四学制)

Units 1-3语法归纳同步练习被动语态(Units 1-3语法归纳)同步练习(答题时间:20分钟)Ⅰ. 单项选择*1. Great changes ________ in my hometown during the past five years.A. has been happenedB. has been taken placeC. happenedD. have taken place2. The Great Wall ____ all over the world.A. knowsB. knewC. is knownD. was known3. —When ___ this kind of computers______?—Last year.A. did; useB. was; usedC. is; usedD. are; used4. —I want to teach in this area.—Well, teachers very much here.A. needB. are needingC. are neededD. well need **5. The flowers well if they .A. won’t grow; don’t take good care ofB. don’t grow; are taken good care ofC. don’t grow; don’t take good care ofD. won’t grow; are not taken good care of6. —Your dress is so nice.—Thanks! It by my uncle as a birthday present.A. boughtB. was boughtC. has boughtD. will buy7. A talk on Chinese history _____ in the school hall next week.A. is givenB. has been givenC. will be givenD. givesⅡ. 用括号中所给动词的正确形式填空1. I ___________(give)a pencil by my mother this morning.2. ___________ the wall _____________(paint)blue by you last month?3. The work ____________________(finish)in two days.4. What shall I do? The key ______________________(lose)by me.5. People should_________________(prevent)from cutting trees.6. The book _________________(buy)by a small boy yesterday.7. Two thieves __________________(catch)by the police last night.8. He _______often_________(tell)to be careful when he drives his car.Ⅲ. 把下列句子改为被动语态1. He bought a CD-ROM last year.A CD-ROM ___________________________________________ last year.2. Tom organizes activities for the computer club.Activities for the computer club______________________________________.3. He can lend me a book.____________________________________by him.4. The boss made them work 10 hours a day.They __________________________10 hours a day.Ⅳ. 根据汉语意思完成下列句子1. 这座桥是他们2004年建的。
【文库精品】七年级英语上册 Starter Units 1-3同步练习 (新版)人教新目标版

Starter Units 1-3Ⅰ.字母(A)按顺序写出英语的26个字母(包括大小写)。
(B)你知道哪五个字母是元音字母吗?请按字母表顺序写出来(包括大小写)。
(C)选出与所给字母具有相同元音音素的一项。
( )1.F A.H B.G C.O D.L( )2.C A.I B.J C.B D.K( )3.H A.M B.K C.E D.O( )4.I A.N B.D C.G D.Y( )5.Q A.K B.U C.D D.BⅡ.词汇(A)根据句意及汉语提示完成句子。
1.I can speak ________ (英语).2.They have a ________ (紫色的) car.3.What is the color of your ________ (夹克衫)?4.Who can ________ (拼写) this word?5.“A” is ________ (在……里) Alice.(B)根据句意及首字母提示补全单词。
1.—Good a________, Frank!—Good afternoon, Mike!2.I can s________ my ABCs.3.—H________ is your mom?—She is fine, thanks.4.—Can you s________ it?—Yes, PEN.5.—What color is it?—It's w________.(C)写出下列各词(组)的英文缩写形式。
1.停车场 ________ 2.千克;公斤 ________3.中国中央电视台 ________4.what is ________ 5.I am ________Ⅲ.单项填空( )1.英语字母共有 ________ 个。
其中辅音字母 ______ 个,元音字母 ______精品学习资料个。
A.26; 20; 6 B.27; 22; 5C.25; 20; 5 D.26; 21; 5( )2.I ________ Lin Tao.This ________ my ruler.A.is; is B.is; amC.am; is D.is; are( )3.I must go to school(去上学) now.________.A.Good B.FineC.Hello D.Bye( )4.下列字母含有相同元音音素的是________.A.Y I J B.W U QC.A B I D.E C X( )5.—What's this ________ English?—It's ________ orange.A.with; an B.in; anC.with; a D.in; a( )6.—________ is the pen?—It's blue.A.What B.What colorC.Where D.How( )7.This is ________ key and that is ________ orange.A.a; a B.an; anC.an; the D.a; an( )8.—Spell it, please.—________.精品学习资料A. Yes, JACKETB. JacketC. JACKET, jacketD. OK, it's a jacket( )9.下午遇见老师时,你应说:“________”A.Good morning!B.Thanks.C.Good afternoon!D.Hi!( )10.早晨在校门口遇到同学时,你应该怎样打招呼?A.How are you?B.Good morning!C.Good evening!D.Good afternoon!( )11.对方帮了你的忙后,你应说:“________”A.OK. B.Thanks.C.Hello! D.Hi!( )12.晚上遇见你的朋友时,你应说:“________”A.Good evening!B.Good morning!C.Good afternoon!D.Good night!( )13.当别人向你问好说“How are you?”时,你应该怎样回答?A.I'm fine, thanks.B.Hello!精品学习资料C.How are you?D.How do you do?( )14.—What color is the ruler?—________.A.It's the white B.It's whiteC.Its white D.It's a white( )15.你到办公室找高老师,高老师说“Sit down,please.”,你应回答:“________”A.Thank you, Miss Gao.B.Hello, Miss Gao!C.How are you, Miss Gao?D.OK.Ⅳ.从(B)栏中选出与(A)栏中的句子相对应的答语(A)( )1.Hi, I'm Mike.( )2.Good morning!( )3.Good afternoon!( )4.Good evening!( )5.How are you?( )6.Hello, Eric!( )7.Spell it, please.( )8.What's this in English?( )9.Goodbye.( )10.What color is it?(B)A.Good evening!B.Goodbye.C.It's a map.D.Good morning!E.Hi, Li Lei!F.I'm fine, thanks.G.Good afternoon!H.Hi, I'm Alice.I.It's red.J.KEY.Ⅴ.根据表格内容完成句子,每空一词1.Jane's ruler is ________.2.Helen's pen is ________.3.Helen's and Jane's jackets are ________.4.Jane's ________ is black.5.Helen's ________ is blue.Ⅵ.翻译下列句子1.“你好吗?” “我很好,谢谢!”________________________________________________________________________________________________________________________________________________ 2.“这个用英语怎么说?” “它是一个橙子。
人教版八年级物理1-3《运动的快慢》专项练习(含答案) (41)

()
A v 甲<v 乙;s=1.2 米。
B v 甲>v 乙;s=0.6 米。
C v 甲>v 乙;s=1.2 米。
D v 甲=v 乙;s=0.6 米。
10.(2 分)甲、乙两人同时从同一起跑线出发,同向做匀速直线运动,某时刻他们的位置如 图所示,图中能正确反映两人运动距离与时间关系的是 ............................................. ( )
D 评卷人
得分
二、填空题
11.60 360 12. 2.25 13.1680(4 分) 14.自己 40
15.变速直线匀速直线
16.4.67
17.28
18.80km/h0.5
19.(1)匀速 6 (2)1.2 (3)小于
20.210 汽车
21.6.25m/s;相对静止
22.甲 丙 乙
23.1454 140
【参考答案】***试卷处理标记,请不要删除
评卷人 得分
一、选择题
1.C 2.A 3.C
4.C 5.C 6.ABD 解析:点拨理解匀速直线运动概念应抓住本质的两点(1)快慢不变(即速度大小不变) (2)运动路线是直线.钟表来回摆动,运动路线既不是直线,其运动快慢也时刻发生变
化,故 A 错;汽车匀速转弯,虽速度大小不变,但运动路线不是直线,故 B 不对;月亮绕 地球运动,其运动路线是圆周,也不是匀速直线运动.列车在平直轨道上匀速运动,保证
到
。
22.(3 分)甲、乙、丙三辆小车同时、同地向同一方向运动,它们运动的图像如图所示,由
图像可知:运动速度相同的小车是 和 ;经过 5s,跑在最前面的小车是 。
23.(3 分)暑假,小明准备去上海参观世博会,顺便去南京看外婆。他在网上搜索到了北京 至上海的一系列车次,最终决定乘座和谐号动车组 D231 次列车,该车的部分经停车站的
Units1-3 小练习

Units1-3 小练习单项选择1. _________trip to the village made us very unhappy. It was really __________terrible trip. [单选题] *A. A; theB. The; a(正确答案)C. A; aD. The; the2. The old man has lived in the country ___________ he was young. [单选题] *A. whileB. forC. whenD. since(正确答案)3. They will do a history project ___________ the changes in China over the years. [单选题] *A. on(正确答案)B. ofC. inD. with4. My uncle __________ a farmer, but now he is a driver. [单选题] *A. is used to beB. used to be(正确答案)C. is used toD. used to being5. Every morning, I come to school by bus__________. [单选题] *A. on my own(正确答案)B. with my ownC. in my ownD. by my own6. ——Have you finished your homework _________?——Yes, I’ve __________ finished it. [单选题] *A. just; alreadyB. yet; neverC. yet; already(正确答案)D. already; yet7. To learn English well, you’d better speak English __________ possible. [单选题] *A. as many asB. so many asC. so often asD. as often as(正确答案)8. I can’t get into my room now because I __________my key. [单选题] *A. loseB. will loseC. have lost(正确答案)D. am losing9. Jim knows little about Canada. He’s never been there, __________? [单选题] *A. isn’t heB. has he(正确答案)C. is heD. hasn’t he10. ——_________has he been like this? ——Ever since last week. [单选题] *A. How long(正确答案)B. WhenC. How oftenD. How much11. I’m sorry you’ve missed the train. It ________five minutes ago. [单选题] *A. left(正确答案)B. has leftC. has been awayD. has been left12. ——Excuse me, when _______you________ the man in blue?——Last year in Suzhou. I _______him for about one year. [单选题] *A. did, know; have known(正确答案)B. have, known; have knownC. did, know; knewD. have, known; knew13. ——Who called just now? ——The phone stopped ringing ________I could answer it. [单选题] *A. afterB. before(正确答案)C. whileD. if14. _________, do you know where the nearest post office is? [单选题] *A. By the way(正确答案)B. On the wayC. In the wayD. In some ways15. Last Thursday when I got to the station,I_________I had left my ticket at home. [单选题] *A. understoodB. realized(正确答案)C. believedD. seemed16. ——Where is Mr. Wang? ——He together with his students ________ Suzhou Amusement Park. [单选题] *A. has gone to(正确答案)B. have gone toC. has been toD. have been to17. She ________ for ten years and now she has a lovely daughter. [单选题] *A. marriedB. has been married(正确答案)C. got marriedD. has got married18. ——I’m going to have a trip to Window of the World.——__________. [单选题] *A. Goodbye.B. Help yourself.C. I’m sorry to hear that.D. Enjoy yourself.(正确答案)19. -Tomorrow is Sunday. How do you spend it?-I want to go on _______ trip to_______ Great Wall. [单选题] *A. a; the(正确答案)B. /; theC. the; aD. the; /20. -What's your hobby, Diana?-Well, I have many hobbies, _______ dancing, singing and water sports. [单选题] *A. instead ofB. because ofC. such as(正确答案)D. for example21. -Where is the Little Mermaid? -It's in _______. [单选题] *A. PisaB. LondonC. Copenhagen(正确答案)D. Sydney22. The book _______ Lucy's. Look! Her name is on the book cover. [单选题] *A. may beB. mustn't beC. must be(正确答案)D. can't be23. - _______ has your grandpa lived here? -Since last year. [单选题] *A. How long(正确答案)B. How oftenC. How soonD. How far24. On my birthday, my uncle bought a watch _______ a present _______ me. [单选题] *A. for; asB. as; asC. as; for(正确答案)D. for; for25. My father _______ to South Hill. He _______ there for five days. [单选题] *A. has gone; has been(正确答案)B. has been; has goneC. has gone; has goneD. has been; has been26. _______ this term, I'm sure I'll get better grades because I study very hard. [单选题] *A. In the endB. At the endC. In the end ofD. At the end of(正确答案)27. John has _______ the Birdwatching Club for two months. [单选题] *A. joinedB. been a member of(正确答案)C. taken part inD. joined in28. -Have you given the books back to the library_______?-Yes, I have_______ given them back. [单选题] *A. yet; yetB. ever; alreadyC. already; yetD. yet; already(正确答案)29. The football match _______ for an hour, but we are still very excited. [单选题] *A. has finishedB. has endedC. has been over(正确答案)D. has over30. -I’m sorry I ________ my exercise book at home.-Don’t forget ________ it to school tomorrow, please. [单选题] *A. forgot, to takeB. left, to bring(正确答案)C. forgot, to bringD. left, to take31. The teacher asked the students to stop ________ and have a group discussion. [单选题] *A. wroteB. writeC. writing(正确答案)D. to write32. ________ great fun we ________ last night! [单选题] *A. How ; hadB. What a; hadC. How a; have hadD. What; had(正确答案)33. I know ________ about the matter than Millie does. [单选题] *A. more littleB. more lessC. even less(正确答案)D. even little34. My mother often ________ the soup to see if she had put enough salt in it. [单选题] *A. smeltB. feltC. tasted(正确答案)D. looked35. John and I are good friends. We ________ each other for ten years. [单选题] *A. knewB. had knownC. knowD. have known(正确答案)36. Would you mind ________ so loudly? I want to make a call. [单选题] *A. to talkB. of talkingC. not to talkD. not talking(正确答案)37. David’s made few friends since he came into this school, ________? [单选题] *A. wasn’t heB. isn’t heC. hasn’t heD. has he(正确答案)38. I thought ________ for her to finish her homework in such a short time. [单选题] *A. it’s impossibleB. that impossibleC. it impossible(正确答案)D. impossible39. I ________ in this small mountain village when I was a child. [单选题] *A. used to aliveB. am used to livingC. used to live(正确答案)D. used to living40. The water in the lake is cleaner than ________ in the river. [单选题] *A. itB. that(正确答案)C. the oneD. those41. I saw Daniel ________ videos when I walked past his house. [单选题] *A. watchB. was watchingC. has watchedD. watching(正确答案)42. The programme ______ for an hour. It ______ an hour ago. [单选题] *A. has begun; was onB. has been on; has begunC. began; has been onD. has been on; began(正确答案)43. --I don’t know how to write a report about my favourite season. What about you?--Oh, I have no idea, _______. [单选题] *A. alsoB. either(正确答案)C. tooD. so44. Millie _______ her homework just now. But I _____ mine. I shouldn’t watch TV first. [单选题] *A. has finished; haven’t finishedB. finished; don’t finishC. finished; haven’t finished(正确答案)D. has finished; didn’t finish45. Children _______ play with fire. It's too dangerous. [单选题] *A. mayB. may notC. mustD. mustn't(正确答案)46. -- _______ today’ work, everyone. -- Great. We can go home now. [单选题] *A. Prepare forB. Talk aboutC. So much for(正确答案)D. Think about47. --Where is Mike?--He _____to New York on business. He _______ the airport at five in the morning . [单选题] *A. has gone; has left forB. has been; has left forC. has gone; left for(正确答案)D. has been; left for48. --- How many students are there in each group?--- Usually each group _______ six students in our class. [单选题] *A. is made fromB. is made up of(正确答案)C. is made inD. is made of49. -- Must I return the Journey to the West to you at once?--No, you _______. Because I have read it twice. [单选题] *A. haven't toB. hasn't toC. don't have to(正确答案)D. mustn't50. --It's so hot here. Do you mind_______ the window?--_______. I will do it right now. [单选题] *A. to close; YesB. to open, NoC. opening; Of course not(正确答案)D. closing; I hope so班级: [填空题] *_________________________________姓名: [填空题] *_________________________________。
人教目标版九年级英语Unit 1-3词汇练习
词汇题练习卷Units 1---3一、比比谁的词汇多:70%1. He m_________ the list of dates.2. The weather f________ our plan.3. I improve my English by making f______________.4. This word has two p______________.5. Read this passage a________ so that other students can hear you clearly.6. The s_________ come from Canada and give us some talks.7. He is good at d__________ with the problems.8. Our English teacher is very friendly . We r________ him as our friend.9. I l________ my dictionary yesterday , so I need new one.10. It’s our d__________ to help our parents do some housework at home .11. I don’t think the students in China should be a_______ to get their ears p_______.12. After a short time, the plan was a_________.13. I can drive a car, but I haven’t d__________ l_________.14. Football and s_______ are the same .15. On Spring Festival Eve, many people always s______ ______ till tomorrow.16. A: What’s wrong with me, doctor?B: Nothing’s s________, you only catch a cold.17. As a middle school student, we must obey the r______ of the school.18. He’d like to become a p____________ athlete, because he loves sports.19. His mother often teaches him the i_________ of working hard.20. I decide I will go to Jilin for skating in my v__________.21. You can learn English by making v__________ lists.22. It improves my speaking skills by practicing c_________ with friends.23. Li Chang told us that j________ the English Club at school was the best way of learning Engli sh.24. The writer was a________ to speak in class.25. I used to watch TV or c____ with my grandmother, but now I have to study.26. Surfing is enjoyed by people all over the w_______.27. There will be Olympic Games h______ by China in 2008.28. He successfully crossed the English c_______ between England and France.29. We should p________ more trees to make our city greener.30. Don’t s_______ on the grass in a park.31. She used to live in New York, but she doesn’t live there a__________.32. I go to sleep with my bedroom light o______.33. He was t________ of the tiger when he was young.34. Why not join an English club and practice s_________ English?35. Now I am really i__________ in collecting stamps.二、连连看:10%( )1. stay up A. a few days ago( )2. the other day B. not go to sleep because of doing something.( )3. allow C. the person whose job is driving a car or a bus.( )4. driver D. not clever( )5. silly E. may do something三、变脸大师:20%1. memorize (名词)___________2. waste(现在分词)_____________3.dark(反义词)______________4. impress(过去式)______________5. terrify(形容词)____________6. death(动词)__________________7. answer(同义词)___________ 8. teach(过去分词)______________9. unfair(反义词)____________ 10. in the end(同义词)___________恭喜你!单词全部过关了!若有缺憾,下次努力哦!答案:一、1. memorized2. frustrated3. flashcard4. pronunciations5. aloud6. speakers7. dealing8. regard9. lost 10. duty 11. allowed , pierced 12. agreed 13. driver’s license 14. socce r 15. stay up 16. serious 17. rules 18. professional 19. importance 20. vocation 21. vocabular y 22. conversation(s) 23. joining 24. afraid 25. chat 26. world 27. held 28. channel 29. plan t 30. spit 31. anymore 32. on 33. terrified 34. speaking 30. interested二、1----5 BAECD三、1. memory2. wasting3. light4. impressed5. terrible / terrified6. die7. reply8. taught9. fair 10. at last / finally。
C语言1-3章练习题-作业-答案
一、选择题(可不抄题目)1.执行"int k=11;k=1/3*k++;"后,k的值是____A.0B.3C.4D.122.以下常量中正确的是___ ___A.'abc'B.'\x123'C.3.145E-1.2D."a"3.能将高级语言编写的源程序转换成目标程序的是______。
A. 编辑程序B. 编译程序C. 解释程序D. 链接程序4.设a和b均为double型常量,且a=5.5、b=2.5,则表达式(int)a+b/b的值是______。
A. 6.500000B. 6C. 5.500000D. 6.0000005. 正确的C语言用户自定义标识符是______。
A. ok?B. floatC. a3bD. random﹪26.以下程序的输出结果是void main( ){int a=12,b=12;printf("%d %d\n",--a,++b);}A.10 10B.12 12C.11 10D.11 13二、填空题(可不抄题目)1.若有"int a=5;a+=a-=-a*a;",则a的值是___2.表达式a=3*5,a*4,a+5的值是___________3. C程序开始往往含有以“#”开头的命令,它们是命令。
在程序中以“/*”开始, 以“*/”结束的内容, 它们是程序中的部分, 用以帮助阅读程序。
程序代码的录入,生成程序*.c,语法分析查错,翻译生成程序*.obj,与其它目标程序或库链接装配,生成程序*.exe。
4. 设int a; float f; double i ;则表达式10+'a'+i*f值的数据类型是___________。
三、程序题:1、编写一个程序,能显示出以下两行文字(用顺序结构完成)。
2、从键盘上输入三个小数,求出平均值,并输出这三个数和平均值,要求平均值保留2位小数位数。
人教版高中物理必修一高一《1-3速度》练习题
(精心整理,诚意制作)一、选择题1.下列说法正确的是 [ ]A.变速直线运动的速度是变化的B.平均速度即为速度的平均值C.瞬时速度是物体在某一时刻或在某一位置时的速度D.瞬时速度可看作时间趋于无穷小时的平均速度3.子弹以900m/s的速度从枪筒射出,汽车在北京长安街上行驶,时快时慢,20m in行驶了 18km,汽车行驶的速度是54km/h,则 [ ]A.900m/s是平均速度B.900m/s是瞬时速度C.54km/h是平均速度D.54km/h是瞬时速度4.物体通过两个连续相等位移的平均速度分别为v1=10m/s,v2=15m/s ,则物体在整个运动过程中的平均速度是 [ ]A.12.5m/sB.12m/sC.12.75m/sD.11.75m/s5.作变速直线运动的物体,若前一半时间的平均速度为4m/s,后一半时间的平均速度是8m/s,则全程的平均速度是 [ ]A.7m/sB.5m/sC. 6m/sD. 5.5m/s6.下列作直线运动的速度-时间图象(图1)中,表示质点作匀变速直线运动的是[ ]7.质点作单方向的匀变速直线运动时,下列论述中正确的是 [ ]A.相等的时间内位移相等B.相等的时间内位移的变化相等C.相等的时间内速度的变化相等D.瞬时速度的大小改变,但方向不变8.一学生在百米赛跑中,测得他在 50m处的瞬时速度为6m/s,16s末到达终点的瞬时速度为7.5m/s,则它在全程内的平均速度是:[ ]A.6m/sB.6.25m/sC.6.75m/sD.7.0m/s二、填空题9.一辆汽车在一条直线上行驶,第1s内通过5m,第2s内通过20m,第3s内通过20 m,第4s内通过 5m.则此汽车在最初 2s内的平均速度是______m/s,中间2s内的平均速度是______m/s,全部时间内的平均速度是______m/s.10.匀速直线运动的s-t图象中的______可表示质点运动的快慢,______越大,质点运动的速度也越大.11.如图2(a)中的图象A表示质点作______运动,图象B表示质点作______,图象C表示质点______;在图(b)中的图象A表示质点作_______,图象B表示质点作_______,图象C表示质点作_______.三、计算题12.某运动员在百米跑道上以8m/s的速度跑了80m,然后又以2m/s的速度走了20 m,这个运动员通过这段路的平均速度是多少?13.图3是甲、乙两物体的位移和速度图象.试根据图象说明从A→B→C→D的各段时间内,甲物体在5s内的位移是多少?你能求出乙物体在5s内的位移吗?速度练习题答案。
人教版八年级物理1-3《运动的快慢》专项练习(含答案) (945)
人教版初中物理八年级物理上册第一章《运动的快慢》测试卷学校:一、选择题1.(2分)某物体用v 1的速度运行了t 秒钟,接下来又用v 2的速度运动了t 秒钟。
那么该物体在这两段时间内的平均速度是 ............................................................................................. ( ) A .v 1+v 22B .2v 1·v 2v 1+v 2C .v 1+v 22v 1·v 2D .v 1·v 2v 1+v 22.(2分)某一物体做变速直线运动,已知它在前一半路程中的速度是4 m/s ,后一半路程中的速度是6 m/s ,那么它在整个路程中的平均速度是 ................................................... ( ) A .4 m/sB .4.8 m/sC .5 m/sD .6 m/s3.(2分)下列物体运动速度最大的是 ................................................................................. ( ) A .百米世界纪录是9.84sB .手扶拖拉机每分钟行驶300mC .某学生骑车速度20km /hD .城区汽车10min 行驶6km4.(2分)某物体在做匀速直线运动,由公式v =st 知,下列说法正确的是 ....................... ( ) A .v 与s 成正比B .v 与t 成反比C .s 与t 成正比D .以上说法均不对5.(2分)甲乙两物体分别以2米/秒和3米/秒的速度一前一后同向而行,以哪个物体为参照物观看甲的速度在数值上最小:( ) A .地球;B .太阳;C .乙物体.6.(2分)下列说法中,正确的是:( ) A .运动路程越长,速度越大;B .相同时间内,通过的路程越大,速度越小;C .运动时间越短,速度越大D .通过相同的路程,所用时间越短,速度越大.7.(2分)甲、乙两个物体都做匀速直线运动,甲的速度大于乙的速度.则甲、乙两物体通过的路程: ( )A.甲大于乙通过的路程; B.甲小于乙通过的路程;C.甲、乙通过的路程相等; D.无法判断 .8.(2分)一短跑运动员5s内跑了50m,羚羊的奔跑速度是20m/s,汽车的行驶速度是54km/h,三者速度从小到大的排序是()A.汽车、羚羊、运动员B.羚羊、汽车、运动员C.运动员、汽车、羚羊D.运动员、羚羊、汽车评卷人得分二、填空题9.(3分)(3分)汽车上的机械式里程表是用安装在轮上的一组计数齿轮来实现计数的,而这些计数齿轮又通过特定的传动装置被车轮的转动所驱动。
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练习一. 用括号中适当的词填空。
1. I ____ ____(am, are, is) from America.2. She _ ______ (am, are, is) a student.3. Jane and Tom _____ ____(am, is, are) my friends.4. My parents ___ ____ (am, is, are) very busy every day.5. __ ____ (Are, Is, Do, Does) there a Chinese school in New York二.用be动词的适当形式填空1. I ____ a student.2. You ____ a doctor.3. ____ she from Jinan?4. ____ you American?5. He _____ in Class 4, Grade 1.6. It_____ a car.7. They ____ cars.8. ____ your mother in China?9. _____your friends in New York 10. What ____his name?11. These _____ buses. 12.Those _____oranges. 13. Where ____her mother? 14. How old _____your teacher? 15. What class _____ you in? 16.Helen____ a student 17.This _____my book.18.My father______a cook. 19.Jack’s friend____in Class One.20.This _____ my mother. 21.Your sisters______in Class Two. 22.what _______this?23.That______her dog. 24. The cat_______on the desk. 25.The books_______under the table.三、介词at/in/on练习题1)填空1_____the morning 2____Monday morning 3______a rainy evening4_____3:50 5_____2002 6______the morning of April 107______spring 8_____night 9_____this time10____March 11______the Qing Dynasty(清朝)12___a warm morning___ April 13___Saturday 14 ___noon1 5______that time 16______the winter 17____the morning of the 15th18____New Year’s Eve(除夕) 19..There is a big hole(洞)____the wall20.The teacher put up a picture ___the wall.2)选择题1.____the afternoon of May, we visited the old man.A. OnB. AtC. In2. Many people work ___the day and sleep___ nightA. on ; atB. in ; inC. in ; at3.He left home ___a cold winter eveningA. at B .on C. to4.You are free to speak ___the meetingA. atB. in C . on5.He woke up several times ____the nightA. inB. atC. on6. We traveled overnight to Paris and arrived____5 o’clock ___the morningA. on ; inB. at ; inC. at ;onD. in ; on7.There are many apples___ the tree. A bird___ the tree is picking an appleA in ; on B. on ; in C in ; atI. be 动词(用be动词的正确形式填空)1. _______ your grandmother thin or fat?2.Where ______ your book ?3.Where ______ my pencil case and my notebook?4.There _____ nine people in my family.5.---How much ______ the exercise book and the magazine? ----That _____ ninety dollars.6.Ben ______ a middle school student, and his parents _____ doctors.7.Scott likes action movies best. His favorite actors ______ Jackie Chan and Jet Li.8.-- What color _____ your shoes?-- Black.9.-- Hello. My name _____ Jack. This is my friend. His name ______ Tom.-- Nice to meet you. I _______ Rick.10. ______ you still a librarian? No, I _______ an accountant now.II.用a ,an,the 或者\ 填空1)There is ______ water on the floor.2)There is ___ orange on ____ desk.3)What do you know about _____ pandas?4)I want to have ______ chicken for dinner.5)There is _______ fish in the bow. Look! It can swim very fast.6)There is _____ ‘m’ in ‘climb’ and there is ______ ‘u’ in ‘country’.7)I don’t like _______ oranges but I like ________ apples.8)My brother is ______ engineer, and my sister is _______doctor now.9)I don’t like _______ movie. It’s boring.10)______ Jenny’s birthday is Nov. 12th.11)--Let’s go and play ______ chess.--Sorry, I’m afraid I can’t. It’s time for me to play ______ piano.12)He usually has his ______ breakfast at 7:00am and goes to ______ school at 7:30.III. 句型转换Part 1:将下列句子改为一般疑问句, 并作肯定和否定两种回答。
1.I have a dictionary.___________________________________________________________________________ 2.There are a lot of animals in the zoo.___________________________________________________________________________ 3.He does his homework at night.___________________________________________________________________________ 4.Dogs live in all parts of the world.___________________________________________________________________________ 5.Greenfield is a small village in England.___________________________________________________________________________Part 2:将下列句子改为否定句。
1.There is a very high waterfall in Venezuela._______________________________________________________________ 2.Egypt has a very long river._______________________________________________________________ 3.She does her homework every day._______________________________________________________________ 4.I come to school by bus._______________________________________________________________ 5.She can swim very well._______________________________________________________________。