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三年级上册第一单元和第二单元

三年级上册第一单元和第二单元

三年级上册第一单元和第二单元第一单元:我的家庭我是一个三年级的小学生,我要给大家介绍一下我的家庭。

我家有四口人,爸爸、妈妈、弟弟和我。

爸爸是个高个子,他是一位医生。

妈妈是个温柔美丽的女人,她是一位老师。

弟弟叫小明,他才五岁,非常调皮可爱。

我就是家里的大哥哥,我喜欢帮助弟弟学习。

我们家住在一个小区里的一个三层楼的房子里。

一楼是客厅和厨房,二楼是卧室,三楼是休闲娱乐室。

我们家布置得很温馨,墙上挂满了我们家庭的照片。

爸爸工作很忙,但周末他会带我们去公园玩。

妈妈是一位好厨师,她会做很多好吃的菜,我最喜欢吃她的炒饭。

弟弟是个活泼的小伙子,他喜欢在家里到处跑来跑去。

有时候他会捉弄我,但我还是很爱他的。

我和弟弟每天一起读书做作业,我们互相帮助,一起进步。

我的学习成绩一直都不错,这让爸爸妈妈很开心。

他们鼓励我多读书,开拓自己的视野。

尽管我们家不大,但我们都很满足。

爸爸妈妈给我们提供了一个温暖幸福的家庭,我真的非常感激。

第二单元:我的学校生活我要给大家介绍一下我在学校的生活。

我上学的学校离我家不远,每天我都会步行去上学。

我喜欢早上的校园,有花草树木和清新的空气。

学校有一个大操场,我常常和同学们一起在操场上玩耍、跑步。

我喜欢上学,因为我可以和同学们一起学习和玩耍。

我们上课非常认真听讲,老师会讲解很多有趣的知识。

我喜欢上数学课,因为我擅长解数学题,也喜欢用逻辑思维推理问题。

每天中午,我们都会在学校的餐厅吃午饭。

食堂的阿姨们会做出很多美味的菜,我们可以根据自己的口味选择。

与同学们一起吃饭,我们可以交流学习和日常生活的感受,增进友谊。

学校也会组织许多丰富多彩的活动,比如运动会、图书馆参观、校外实践等等。

我喜欢参加这些活动,可以结识新朋友,锻炼自己的能力。

除了学习,我也参加了学校的美术社团。

老师教我们怎样画画,我喜欢用颜料来创作美丽的画作,画画可以让我放松心情,也能展现自己的想象力。

每天放学后,我会和同学们一起回家。

我们会讨论当天的学习情况,一起玩游戏或者打篮球。

小学五年级上册1--2单元课时练习和单元练习

小学五年级上册1--2单元课时练习和单元练习

第一单元小数乘法1.小数乘整数姓名:一、认真思考填一填。

1. 2.5+2.5+2.5=()×()。

4.8×4=()+()+()+()。

2. 0.57×6的积是()位小数。

3.把15.6的小数点去掉后,原来的数就扩大到它的()倍。

4. 0.52扩大()倍是52。

86缩小为原来的()是0.086。

5.2.45×16可以转化成245×16,计算后把所得的积缩小到它的()。

6.一本《成语接龙》14.8元,买2本应付()元。

二、火眼金睛判一判。

(对的打“√”,错的打“×”)1. 一个因数扩大10倍,另一个因数不变,积也扩大10倍。

()2. 7.35×4的积是一位小数。

()3. 5.47×6可以转化成547×6,积的大小不变。

()4. 4.8×3表示3个4.8的和是多少,也表示4.8的3倍是多少。

()5.2.5×5与5×2.5的结果相同,读法也相同。

()三、聚精会神算一算。

1. 我会口算。

0.8×4= 2.5×100= 0.06×7=0.5×100= 1.3×5= 4.2×3=2. 根据28×15=420,我能很快写出下面各题的积。

280×15= 2.8×15= 0.28×15=28×150= 0.28×150= 0.028×15=3. 竖式计算我能行。

0.32×6= 4.5×18= 32.5×12=4. 列式计算我最棒。

(1)50个6.5是多少?(2)15.4的3倍是多少?(3)12个3.5连加的和是多少?四、解决问题做一做。

1.甜瓜每千克3.2元,奶奶爱吃甜瓜,冬冬为奶奶买了5千克,需要多少钱?2.数学书封面长18.5厘米,宽13厘米,它的面积是多少平方厘米?2.小数乘小数(一)姓名:一、我会填一填。

八年级英语上册Units 1--2单元重点回顾

八年级英语上册Units 1--2单元重点回顾

八年级英语上册Units 1—2单元重点回顾1.anyone(pron.)任何人★2.anywhere(adv.)在任何地方3.wonderful(adj.)精彩的;绝妙的★4.few(adj.& pron.)不多;很少★5.most(adj.adv.& pron.)最多;大多数★6.something(pron.)某事;某物7.nothing(pron.)没有什么;没有一件东西★8.everyone(pron.)每人;人人;所有人9.myself(pron.)我自己;我本人10.yourself(pron.)你自己;您自己★11.seem(v.)似乎;好像;看来12.bored(adj.)厌倦的;烦闷的★13.diary(n.)日记;记事簿14.activity(n.)活动★15.decide(v.)决定;选定★16.try(v.& n.)尝试;设法;努力17.building(n.)建筑物;房子18.difference(n.)差别;差异★19.wait(v.)等待;等候20.umbrella(n.)伞;雨伞21.wet(adj.)湿的;潮湿的;下雨的22.below(prep.& adv.)在……下面;到……下面★23.enough(adj.& adv.)足够的(地);充足的(地);充分的(地)★24.hungry(adj.)饥饿的25.as(adv.)像……一样;如同(conj.)当……时;如同26.dislike(v.& n.)不喜爱(的事物);厌恶(的事情) 27.housework(n.)家务劳动;家务事28.hardly(adv.)几乎不;几乎没有★29.ever(adv.)在任何时候;从来;曾经30.once(adv.)一次;曾经31.twice(adv.)两次;两倍★32.program(n.)节目33.full(adj.)忙的;满的;充满的34.maybe(adv.)大概;或许;可能★35.least(adv.)最小;最少(adj.& pron.)最小的;最少的★1.wonder(v.)想知道 5.die(v.)消失;灭亡→healthily(adv.)健康地at 12.上网go online13.例如;像……这样such as14.去看牙医go to the dentist15.多于more than16.少于less thanwaited over an hour for the 续表。

【精品】北师大版九年级数学上册(1-2)单元过关试卷(含答案)

【精品】北师大版九年级数学上册(1-2)单元过关试卷(含答案)

北师大版九年级数学上册(1-2)单元试卷(含答案)第一章精选试卷(时间:120分钟 满分:120分)一、选择题(每小题3分,共30分)1.菱形的对称轴的条数为( )A .1B .2C .3D .42.下列说法中,正确的是( )A .相等的角一定是对顶角B .四个角都相等的四边形一定是正方形C .平行四边形的对角线互相平分D .矩形的对角线一定垂直3.平面直角坐标系中,四边形ABCD 的顶点坐标分别是A(-3,0),B(0,2),C(3,0),D(0,-2),则四边形ABCD 是( )A .矩形B .菱形C .正方形D .平行四边形4.下列命题是假命题的是( )A .四个角相等的四边形是矩形B .对角线相等的平行四边形是矩形C .对角线垂直的四边形是菱形D .对角线垂直的平行四边形是菱形5.如图,矩形纸片ABCD 中,AB =6 cm ,BC =8 cm ,现将其沿AE 对折,使得点B 落在边AD 上的点B 1处,折痕与边BC 交于点E ,则CE 的长为( )A .6 cmB .4 cmC .2 cmD .1 cm6如图,四边形ABCD 是菱形,AC =8,DB =6,DH ⊥AB 于H ,则DH 等于( )A.245B.125 C .5 D .4错误! ,第6题图) ,第7题图)7.如图,每个小正方形的边长为1,A ,B ,C 是小正方形的顶点,则∠ABC 的度数为( )A .90°B .60°C .45°D .30°8.已知四边形ABCD 的两条对角线AC 与BD 互相垂直,则下列结论正确的是( )A .当AC =BD 时,四边形ABCD 是矩形B .当AB =AD ,CB =CD 时,四边形ABCD 是菱形C .当AB =AD =BC 时,四边形ABCD 是菱形D .当AC =BD ,AD =AB 时,四边形ABCD 是正方形9.如图,矩形ABCD 中,AD =2,AB =3,过点A ,C 作相距为2的平行线段AE ,CF ,分别交CD ,AB 于点E ,F ,则DE 的长是( ) A. 5 B.136 C .1 D.56,第9题图) ,第10题图)10.如图,在矩形ABCD 中,点E ,F 分别在边AB ,BC 上,且AE =13AB ,将矩形沿直线EF 折叠,点B 恰好落在AD 边上的点P 处,连接BP 交EF 于点Q ,对于下列结论:①EF =2BE ;②PF =2PE ;③FQ =4EQ ;④△PBF 是等边三角形.其中正确的是( )A .①②B .②③C .①③D .①④二、填空题(每小题3分,共18分)11.已知菱形的两条对角线长分别为2 cm ,3 cm ,则它的面积是____cm 2.12.如图,已知点P 是正方形ABCD 对角线BD 上一点,且BP =BC ,则∠ACP 的度数是____度.13.如图所示,将△ABC 绕AC 的中点O 顺时针旋转180°得到△CDA ,添加一个条件____,使四边形ABCD 为矩形.,第12题图),第13题图),第14题图),第15题图)14.已知矩形ABCD,AB=3 cm,AD=4 cm,过对角线BD的中点O作BD的垂直平分线EF,分别交AD,BC于点E,F,则AE的长为____cm.15.如图,菱形ABCD的边长为4,过点A,C作对角线AC的垂线,分别交CB和AD的延长线于点E,F,AE=3,则四边形AECF的周长为____.16.矩形OABC在平面直角坐标系中的位置如图所示,点B的坐标为(3,4),D是OA的中点,点E在AB上,当△CDE的周长最小时,则点E的坐标为__ __.三、解答题(共72分)17.(10分)如图,矩形ABCD被两条对角线分成四个小三角形,如果四个小三角形的周长的和是86 cm,对角线长是13 cm,那么矩形的周长是多少?18.(10分)如图,在△ABC中,AB=AC,点D为边BC上一点,以AB,BD为邻边作▱ABDE,连接AD,EC.(1)求证:△ADC≌△ECD;(2)若BD=CD,求证:四边形ADCE是矩形.19.(10分)如图,已知菱形ABCD的对角线相交于点O,延长AB至点E,使BE=AB,连接CE.(1)求证:BD=EC;(2)若∠E=50°,求∠BAO的大小.20.(10分)如图,已知在▱ABCD中,点E,F分别是边AB,CD的中点,BD是对角线,AG∥BD交CB的延长线于点G.(1)求证:△ADE≌△CBF;(2)若四边形BEDF是菱形,则四边形AGBD是什么特殊四边形?证明你的结论.21.(10分)如图,已知菱形ABCD,AB=AC,点E,F分别是BC,AD的中点,连接AE,CF.(1)求证:四边形AECF是矩形;(2)若AB=8,求菱形的面积.22.(10分)如图,在正方形ABCD中,点E,F分别在边AB,BC上,∠ADE=∠CDF.(1)求证:AE=CF;(2)连接DB交EF于点O,延长OB至G,使OG=OD,连接EG,FG,判断四边形DEGF是否是菱形,并说明理由.23.(12分)如图,在矩形ABCD中,点M,N分别是AD,BC的中点,点P,Q分别是BM,DN的中点.(1)求证:△MBA≌△NDC;(2)四边形MPNQ是什么特殊四边形?请说明理由.答 案一、选择题(每小题3分,共30分)1-5 BCBCC 6-10ACCDD二、填空题(每小题3分,共18分)11.已知菱形的两条对角线长分别为2 cm ,3 cm ,则它的面积是__3__cm 2.12.如图,已知点P 是正方形ABCD 对角线BD 上一点,且BP =BC ,则∠ACP 的度数是__22.5__度.13.如图所示,将△ABC 绕AC 的中点O 顺时针旋转180°得到△CDA ,添加一个条件__∠B =90°或∠BAC +∠BCA =90°__,使四边形ABCD 为矩形.,第12题图) ,第13题图) ,第14题图) ,第15题图)14.已知矩形ABCD ,AB =3 cm ,AD =4 cm ,过对角线BD 的中点O 作BD 的垂直平分线EF ,分别交AD ,BC 于点E ,F ,则AE的长为__78__cm. 15.如图,菱形ABCD 的边长为4,过点A ,C 作对角线AC 的垂线,分别交CB 和AD 的延长线于点E ,F ,AE =3,则四边形AECF 的周长为__22__.16.矩形OABC 在平面直角坐标系中的位置如图所示,点B 的坐标为(3,4),D 是OA 的中点,点E 在AB 上,当△CDE 的周长最小时,则点E 的坐标为__(3,43)__. 三、解答题(共72分)17.(10分)如图,矩形ABCD被两条对角线分成四个小三角形,如果四个小三角形的周长的和是86 cm,对角线长是13 cm,那么矩形的周长是多少?∵△AOB,△BOC,△COD和△AOD四个小三角形的周长和为86 cm,且AC=BD=13 cm,∴AB+BC+CD+DA=86-2(AC +BD)=86-4×13=34(cm),即矩形ABCD的周长是34 cm18.(10分)如图,在△ABC中,AB=AC,点D为边BC上一点,以AB,BD为邻边作▱ABDE,连接AD,EC.(1)求证:△ADC≌△ECD;(2)若BD=CD,求证:四边形ADCE是矩形.(1)∵AB=AC,∴∠B=∠ACB,又∵四边形ABDE是平行四边形,∴AB∥DE,AB=DE,∴∠ABD=∠EDC,AC=DE,∴∠EDC =∠ACD,又DC=CD,∴△ADC≌△ECD(2)若BD=CD,又∵AB =AC,∴AD⊥BC.又∵四边形ABDE是平行四边形,∴AE綊BD,∴AE綊DC,∴四边形ADCE是平行四边形,∵AD⊥DC,∴▱ADCE 是矩形19.(10分)如图,已知菱形ABCD的对角线相交于点O,延长AB至点E,使BE=AB,连接CE.(1)求证:BD=EC;(2)若∠E=50°,求∠BAO的大小.(1)∵四边形ABCD是菱形,∴AB=CD,AB∥CD,又∵BE=AB,∴BE=CD,BE∥CD,∴四边形BECD是平行四边形,∴BD =EC(2)∠BAO=40°20.(10分)如图,已知在▱ABCD中,点E,F分别是边AB,CD的中点,BD是对角线,AG∥BD交CB的延长线于点G.(1)求证:△ADE≌△CBF;(2)若四边形BEDF是菱形,则四边形AGBD是什么特殊四边形?证明你的结论.(1)∵四边形ABCD是平行四边形,∴AD綊BC,∠A=∠C,CD=AB,又∵点E,F为AB,DC的中点,∴CF=AE,∴△ADE ≌△CBF(2)四边形AGBD是矩形.连接EF,∵▱BEDF是菱形,∴BD⊥EF,又DF綊AE,∴四边形ADFE是平行四边形,∴EF∥AD,∴∠ADB=90°,又∵AD∥BC,DB∥AG,∴四边形AGBD 是平行四边形,∴▱AGBD是矩形21.(10分)如图,已知菱形ABCD,AB=AC,点E,F分别是BC,AD的中点,连接AE,CF.(1)求证:四边形AECF是矩形;(2)若AB=8,求菱形的面积.(1)∵四边形ABCD是菱形,∴AB=BC.又∵AB=AC, ∴△ABC 是等边三角形.∵点E是BC的中点,∴AE⊥BC,∴∠AEC=90°.∵点E,F分别是BC,AD的中点,∴AF=12AD,EC=12BC.∵四边形ABCD为菱形,∴AD綊BC,∴AF綊EC,∴四边形AECF是平行四边形.又∵∠AEC=90°,∴四边形AECF是矩形(2)在Rt △ABE 中,AE =82-42=43,∴S 菱形ABCD =8×43=32322.(10分)如图,在正方形ABCD 中,点E ,F 分别在边AB ,BC 上,∠ADE =∠CDF.(1)求证:AE =CF ;(2)连接DB 交EF 于点O ,延长OB 至G ,使OG =OD ,连接EG ,FG ,判断四边形DEGF 是否是菱形,并说明理由.(1)在正方形ABCD 中,AD =CD ,∠A =∠C =90°,在△ADE 和△CDF 中,⎩⎪⎨⎪⎧∠ADE =∠CDF ,AD =CD ,∠A =∠C =90°,∴△ADE ≌△CDF (ASA ),∴AE =CF (2)四边形DEGF 是菱形.理由如下:在正方形ABCD 中,AB =BC ,∵AE =CF ,∴AB -AE =BC -CF ,即BE =BF ,∵△ADE ≌△CDF ,∴DE =DF ,∴BD 垂直平分EF ,∴EO =FO.又∵OG =OD ,DE =DF ,∴四边形DEGF 是菱形23.(12分)如图,在矩形ABCD 中,点M ,N 分别是AD ,BC 的中点,点P ,Q 分别是BM ,DN 的中点.(1)求证:△MBA ≌△NDC ;(2)四边形MPNQ 是什么特殊四边形?请说明理由. (1)∵四边形ABCD 是矩形,∴AB =CD ,AD =BC ,∠A =∠C=90°,∵在矩形ABCD 中,点M ,N 分别是AD ,BC 的中点,∴AM =12AD ,CN =12BC ,∴AM =CN.在△MBA 和△NDC 中,∵AB =CD ,∠A =∠C =90°,AM =CN ,∴△MBA ≌△NDC (SAS )(2)四边形MPNQ 是菱形,理由如下:连接AN ,易证:△ABN ≌△BAM ,∴AN =BM.∵△MAB ≌△NCD ,∴BM =DN.∵点P ,Q 分别是BM ,DN 的中点,∴PM =NQ.∵DM =BN ,DQ =BP ,∠MDQ =∠NBP ,∴△MQD ≌△NPB (SAS ).∴MQ =NP.∴四边形MPNQ 是平行四边形.∵点M 是AD 的中点,点Q 是DN 的中点,∴MQ =12AN ,∴MQ =12BM.又∵MP =12BM ,∴MP =MQ.∴四边形MPNQ 是菱形第二章检测题(时间:120分钟 满分:120分)一、选择题(每小题3分,共30分)1.下列方程中,关于x 的一元二次方程是( )A .3(x +1)2=2(x +1) B.1x 2+1x -2=0C .ax 2+bx +c =0D .x 2+2x =x 2-12.方程(x -2)(x +3)=0的解是( )A .x =2B .x =-3C .x 1=-2,x 2=3D .x 1=2,x 2=-33.若x =-2是关于x 的一元二次方程x 2+32ax -a 2=0的一个根,则a 的值为( C )A .-1或4B .-1或-4C .1或-4D .1或44.用配方法解一元二次方程x 2-2x -3=0时,方程变形正确的是( B )A .(x -1)2=2B .(x -1)2=4C .(x -1)2=1D .(x -1)2=75.下列一元二次方程中,没有实数根的是( B )A .x 2+2x +1=0B .x 2+x +2=0C .x 2-1=0D .x 2-2x -1=06.解方程(x +1)(x +3)=5较为合适的方法是( C )A .直接开平方法B .配方法C .公式法或配方法D .分解因式法7.已知一元二次方程x 2-2x -1=0的两个根分别是x 1,x 2,则x 12-x 1+x 2的值为( )A .-1B .0C .2D .38.关于x 的方程x 2-ax +2a =0的两根的平方和是5,则a 的值是( )A .-1或5B .1C .5D .-19.某县政府2015年投资0.5亿元用于保障性住房建设,计划到2017年投资保障性住房建设的资金为0.98亿元,如果从2015年到2017年投资此项目资金的年增长率相同,那么年增长率是( B )A .30%B .40%C .50%D .10%10.有一块长32 cm ,宽24 cm 的长方形纸片,在每个角上截去相同的正方形,再折起来做一个无盖的盒子,已知盒子的底面积是原纸片面积的一半,则盒子的高是( )A .2 cmB .3 cmC .4 cmD .5 cm二、填空题(每小题3分,共18分)11.一元二次方程2x 2+6x =9的二次项系数、一次项系数、常数项和为____.12.方程(x +2)2=x +2的解是____.13.若代数式4x 2-2x -5与2x 2+1的值互为相反数,则x 的值是____.14.写一个你喜欢的实数k 的值____,使关于x 的一元二次方程(k +1)x 2+2x -1=0有两个不相等的实数根.15.某制药厂两年前生产1吨某种药品的成本是100万元,随着生产技术的进步,现在生产1吨这种药品的成本为81万元.则这种药品的成本的年平均下降率为____.16.设m ,n 分别为一元二次方程x 2+2x -2018=0的两个实数根,则m 2+3m +n =____.三、解答题(共72分)17.(12分)解方程:(1) x 2+4x -1=0; (2)x 2+3x +2=0;(3)3x 2-7x +4=0.18.(10分)如图,已知A ,B ,C 是数轴上异于原点O 的三个点,且点O 为AB 的中点,点B 为AC 的中点.若点B 对应的数是x ,点C 对应的数是x 2-3x ,求x 的值.19.(8分)一元二次方程x 2-2x -54=0的某个根,也是一元二次方程x 2-(k +2)x +94=0的根,求k 的值.20.(10分)某种商品的标价为400元/件,经过两次降价后的要价为324元/件,并且两次降价的百分率相同.(1)求该种商品每次降价的百分率;(2)若该种商品进价为300元/件,两次降价共售出此种商品100件,为使两次降价销售的总利润不少于3 210元.问第一次降价后至少要售出该种商品多少件?21.(10分)小林准备进行如下操作试验:把一根长为40 cm的铁丝剪成两段,并把每一段各围成一个正方形.(1)要使这两个正方形的面积之和等于58 cm2,小林该怎么剪?(2)小峰对小林说:“这两个正方形的面积之和不可能等于48 cm2,”他的说法对吗?请说明理由.22.(10分)某市电解金属锰厂从今年元月起安装了回收净化设备(安装时间不计),这样既保护环境,又节省原料成本,据统计使用回收净化设备后1~x月的利润的月平均值W(万元)满足W=10 x+90.请问多少个月后的利润和为1620万元?23.(12分)为丰富居民业余生活,某居民区组建筹委会,该筹委会动员居民自愿集资建立一个书刊阅览室.经预算,一共需要筹资30 000元,其中一部分用于购买书桌、书架等设施,另一部分用于购买书刊.(1)筹委会计划,购买书刊的资金不少于购买书桌、书架等设施资金的3倍,问最多用多少资金购买书桌、书架等设施?(2)经初步统计,有200户居民自愿参与集资,那么平均每户需集资150元.镇政府了解情况后,赠送了一批阅览室设施和书籍,这样,只需参与户共集资20 000元.经筹委会进一步宣传,自愿参与的户数在200户的基础上增加了a%(其中a>0).则每户平均集资的资金在150元的基础上减少了109a%,求a 的值.答 案一、选择题(每小题3分,共30分)1-5ADCBB 6-10CDDBC二、填空题(每小题3分,共18分)11.一元二次方程2x 2+6x =9的二次项系数、一次项系数、常数项和为__-1__.12.方程(x +2)2=x +2的解是__x 1=-2,x 2=-1__.13.若代数式4x 2-2x -5与2x 2+1的值互为相反数,则x 的值是__1或-23__. 14.写一个你喜欢的实数k 的值__0(答案不唯一,只要满足k>-2且k ≠-1都行)__,使关于x 的一元二次方程(k +1)x 2+2x -1=0有两个不相等的实数根.15.某制药厂两年前生产1吨某种药品的成本是100万元,随着生产技术的进步,现在生产1吨这种药品的成本为81万元.则这种药品的成本的年平均下降率为__10%__.16.(2016·达州)设m ,n 分别为一元二次方程x 2+2x -2018=0的两个实数根,则m 2+3m +n =__2016__.三、解答题(共72分)17.(12分)解方程:(1) x 2+4x -1=0; (2)x 2+3x +2=0;x 1=-2+5,x 2=-2-5 x 1=-1,x 2=-2(3)3x 2-7x +4=0.x 1=43,x 2=118.(10分)如图,已知A ,B ,C 是数轴上异于原点O 的三个点,且点O 为AB 的中点,点B 为AC 的中点.若点B 对应的数是x ,点C 对应的数是x 2-3x ,求x 的值.由已知,点O 是AB 的中点,点B 对应的数是x ,∴点A 对应的实数为-x.∵点B 是AC 的中点,点C 对应的数是x 2-3x ,∴(x 2-3x )-x =x -(-x ).整理,得x 2-6x =0,解得x 1=0,x 2=6.∵点B 异于原点,故x =0舍去,∴x 的值为619.(8分)一元二次方程x 2-2x -54=0的某个根,也是一元二次方程x 2-(k +2)x +94=0的根,求k 的值.当x 2-2x -54=0得(x -1)2=94,解得x 1=52,x 2=-12.当x =52时,(52)2-52(k +2)+94=0,∴k =75;当x =-12时,(-12)2+12(k +2)+94=0,∴k =-7.答:k 的值为75或-720.(10分)某种商品的标价为400元/件,经过两次降价后的要价为324元/件,并且两次降价的百分率相同.(1)求该种商品每次降价的百分率;(2)若该种商品进价为300元/件,两次降价共售出此种商品100件,为使两次降价销售的总利润不少于3 210元.问第一次降价后至少要售出该种商品多少件?(1)10% (2)设第一次降价后售出该种商品m 件,则第二次降价后售出该种商品(100-m )件,第一次降价后的单件利润为:400×(1-10%)-300=60元/件,第二次降价后单价利润为:324-300=24元/件,依题意得:60m +24×(100-m )=36m +2400≥3210,解得m ≥22.5,即m ≥23.答:为使两次降价销售的总利润不少于3210元,第一次降价后至少要售出该商品23件21.(10分)小林准备进行如下操作试验:把一根长为40 cm 的铁丝剪成两段,并把每一段各围成一个正方形.(1)要使这两个正方形的面积之和等于58 cm 2,小林该怎么剪?(2)小峰对小林说:“这两个正方形的面积之和不可能等于48 cm 2,”他的说法对吗?请说明理由.(1)设其中一个正方形的边长为x cm ,则另一个正方形的边长为(10-x )cm.由题意,得x 2+(10-x )2=58,解得x 1=3,x 2=7,即两个正方形的边长分别为3 cm ,7 cm.4×3=12,4×7=28,∴小林应把铁丝剪成12 cm 和28 cm 的两段 (2)假设能围成.由(1)得x 2+(10-x )2=48.化简得x 2-10x +26=0.∵Δ=b 2-4ac =(-10)2-4×1×26=-4<0,∴此方程没有实数根,∴小峰的说法是对的22.(10分)某市电解金属锰厂从今年元月起安装了回收净化设备(安装时间不计),这样既保护环境,又节省原料成本,据统计使用回收净化设备后1~x 月的利润的月平均值W(万元)满足W =10 x +90.请问多少个月后的利润和为1620万元?由题意得x (10x +90)=1620,解得x 1=9,x 2=-18(舍去),即9个月后利润和为1620万元23.(12分)为丰富居民业余生活,某居民区组建筹委会,该筹委会动员居民自愿集资建立一个书刊阅览室.经预算,一共需要筹资30 000元,其中一部分用于购买书桌、书架等设施,另一部分用于购买书刊.(1)筹委会计划,购买书刊的资金不少于购买书桌、书架等设施资金的3倍,问最多用多少资金购买书桌、书架等设施?(2)经初步统计,有200户居民自愿参与集资,那么平均每户需集资150元.镇政府了解情况后,赠送了一批阅览室设施和书籍,这样,只需参与户共集资20 000元.经筹委会进一步宣传,自愿参与的户数在200户的基础上增加了a%(其中a>0).则每户平均集资的资金在150元的基础上减少了109a%,求a 的值.(1)设用于购买书桌、书架等设施的资金为x 元,则购买书籍的有(30 000-x )元,根据题意得:30 000-x ≥3x ,解得x ≤7 500.答:最多用7 500元购买书桌、书架等设施 (2)根据题意得:200(1+a%)×150(1-109a%)=20 000,整理得a 2+10a -3 000=0,解得a =50或a =-60(舍去),所以a 的值是50。

六上英语1--2单元练习卷

六上英语1--2单元练习卷

六年级上册英语Unit 1-2测试卷听力部分(30分)一、听录音,选出你所听到的内容。

(10分) (听两遍)( ) 1. A. May B. many C. mango D. magic( )2. A. three B. there C. through D. then( )3. A. hurry B. honey C. hungry D. money( )4. A. wet B. where C. weather D. sweater( )5. A. foot B. fish C. finish D. foolish( )6. A. clever B. clear C. cloud D. clean( )7. A. purple B. paper C. pear D. people( )8. A. she B. show C. shoe D. shout( ). A. clothes B. close C. cold D. coat( )10. A. ant B. arm C. am D. any二、听录音,选择准确的答案。

(5分) (听两遍)( ) 1.A .They go to the zoo. B. They are going to the zoo.C. They went to the zoo.( ) 2. A. Yes, I could. B. Yes, I can. C. Yes, I am.( ) 3. A. Yes, there wasn’t B. No. there was.C. Yes, there was.( ) 4. A. It’s rainy. B. It was rainy. C. It’s over there.( ) 5.A. On Wednesday. B. In the afternoon.C. On the second of March.三、听录音,给下列句子排序。

冀教版三下英语1-2单元知识点总结简易版

冀教版三下英语1-2单元知识点总结简易版

Unit1 Animals on the farm知识点总结一、词汇动物类:pig猪,cow奶牛,sheep羊,cat猫,dog 狗,chicken鸡,duck鸭,fish鱼,bird鸟,horse马,rabbit兔子,mouse老鼠介词类(表示位置):in在......里面,on在......上面,under在......下面,at在......二、句子Lesson 1 On the farm1、问:What’s this ? 答:It’s a pig .这是什么?这是一只猪。

2、问:What’s this ? 答:It’s a sheep .这是什么?这是一只羊。

3、问:What’s this ? 答:It’s a cow .这是什么?这是一头牛。

Lesson 2 Cats and dogs4、问:What’s this ? 答:It’s a chicken .这是什么?这是一只鸡5、问:Is it a duck ? 答:No,it isn’t .这是一只鸭子吗?不,它不是。

6、问:Is this a duck ? 答:Yes,it is.这是一只鸭子吗?是的,它是。

Lesson 3 Fish and birds7、Fish can swim .鱼会游泳。

8、Birds can fly .鸟会飞。

9、问:Can you dance ? 答:No,I can’t.你会跳舞吗?不,我不会。

10、问:Can you sing ? 答:Yes,I can .你会唱歌吗?是的,我会。

11、问:Can you swim ? 答:Yes,I can .你会游泳吗?是的,我会。

12、问:Can you dance ? 答:No,I can’t.你会跳舞吗?不,我不会。

13、问:Can you fly? 答:No,I can’t.你会飞吗?不,我不会。

Lesson 4 Horses and rabbits14、Horses can run . 马会跑。

人教版九年级英语上册 Unit1-Unit2单元测试题(含答案)

人教版九年级英语上册 Unit1-Unit2单元测试题(含答案)

人教版九年级英语上册 Unit1-Unit2单元测试题(含答案)一、选择题() 1.You can be healthier ________ eating less and exercising more.A. inB. byC. of() 2. —Lisa can always come up with creative ideas.—Yes. It's clear that she has a good________.A. speedB. brainC. note() 3. I found ________ impossible to learn a language without memorizing words.A. thisB. itC. that() 4. — Can you give me some advice on how to ________ my reading speed?—You can try to read word groups instead of reading word by word.A. pronounceB. connectC. increase() 5. It's important for children to develop the ________to learn and think on their own.A. abilityB. patternC. secret() 6.—I wonder if I can improve my English quickly.—________. There are no overnight success stories.A. It serves you rightB. It's a piece of cakeC. It takes time () 7.—The dishes in this restaurant must be very expensive.—Don't worry.You can enjoy yourself. It's my________.A. choiceB. treatC. taste() 8. —I wonder ________ Jane gets on so well with her classmates.—Because she always cares much about others.A. whetherB. howC. why() 9. —All of my classmates have passed the P. E.test.—________exciting news it is!A. WhatB. What anC. How() 10. — Our English teacher is very nice. Do you think so?— Yes.He tries to teach ________ wants to learn English well.A. whoeverB. wheneverC. whatever二、完型填空The students could all tell something was wrong as they entered the classroom. Their1 teacher was crying. Jack was the first to ask if there was anything they could do.Mrs. Smith tried to smile as s he spoke. “I've just lost something important, and I don't think I can find it.” “What did you 2 ? ”Tom asked, “Maybe we can help you look for it.”Mrs.Smith looked at their faces for some time. 3 she answered, “Well, I left an old newspaper on my desk. This newspaper belonged to(属于) my grandmother. I had hoped to share something in the paper with you in today's history class. The paper is old, but it is also 4 because she gave it to me before she died. It is something my grandmother left to 5 . The newspaper was gone when I came back from lunch.”The other students looked at each other. They 6 who had taken the paper and hoped nobody would do something like that. Everyone liked Mrs.Smith. No one wanted to make the teacher sad.Eric went over and spoke up 7 the whole class, “Dear Mrs.Smith, we will all help you.We're sure to find it 8 we work together.”Mrs.Smith smiled again at her students. She knew they might not find the missing paper, but even if they didn't, she would 9 feel very lucky.The group of students 10 her and each other, and that was probably the best thing she could ever hope to find in her life!() 1. A. English B. history C. chemistry() 2. A. forget B. say C. lose() 3. A. Finally B. Nervously C. Quickly() 4. A. expensive B. dirty C. special() 5. A. her B. me C. us() 6. A. discovered B. explained C. wondered() 7. A. for B. at C. to() 8. A. because B. If C. although() 9. A. still B. again C. almost() 10. A. cared about B. depended on C. looked up 三、阅读理解All through grade school, I got extra help with schoolwork. If I got a D, I was very happy. If I got a C-minus (C-), I had achieved greatness. A’s and B’s were a kingdom I could never enter.Once my teacher, Miss Mills, had given me a list of ten spelling words. My mother and I went over the list until I knew those words. I felt great. I thought, “Wow! This time, I’m going to pass”. The next day, I went into the classroom and began to write down the words. The first word was carpet. I wrote that one down: c-a-r-p-e-t. I was feeling pretty confident. Then came neighbor--I wrote down the letter n. Then rhythm--I knew there was an r. Suburban--I wrote s-u-b. My confidence failed me. I had gone from 100 percent to maybe a D-minus. Where did the words go?Some people talk about information sliding off your brain. That was my life. I was an underachiever (未能充分发挥学习潜力者).Now I know I have dyslexia (诵读困难症). A person with dyslexia might see the as teh, andbird as brid. My brain learns differently. A learning disability can really change the way you feel about yourself. Now I know that even if I learn differently, I can still be filled with greatness.Today when I visit schools as an actor, director, and co-author of children’s books, I tell children that everyo ne has something special inside. It’s our job to find out what that is and get it out, and give it to the world as a gift.( ) 1. What’s the writer’s problem in grade school?A. He had trouble spelling.B. He often got C-minuses.C. He was absent-minded.D. He had a physical disability.( ) 2. From Paragraph 2, we can infer that the writer __________.A. wrote down 20% words correctlyB. knew he had dyslexia thenC. felt upset about himself at lastD. studied hard and passed the test( ) 3. The underlined phrase “sliding off” in Paragraph 3 probably means __________.A. coming intoB. going throughC. moving aroundD. disappearing from( ) 4. After the writer knew he had dyslexia, he __________.A. felt very excitedB. had more difficulties in studyC. was filled with sadnessD. changed his view of himself( ) 5. What would be the best title for the passage?A. A Change for SureB. A Great UnderachieverC. A Gift from the WorldD. A Special Spelling Bee四、短文填词On 28 1 [mɑːtʃ], millions of people around the world switched off their lights to mark Earth Hour. Earth Hour is an annual(一年一度) event that brings 2 [əˈtenʃn] to the climate change. It’s run by the World Wildlife Fund (WWF), 3 organization that protects wildlife and the environment. People are encouraged to turn off the non-essential(不必要的) lights for an hour, 4 8:30 pm to 9:30 pm. It’s about giving people a voice on the planet’s future and 5 (work) together to create a better environment.Sydney Opera House was not the only landmark to turn off its lights this year. Others 6 [ɪnˈkluːdɪd] Tower Bridge in London, and the Brandenburg Gate(勃兰登堡门) in Berlin,Germany.Earth Hour 2020 7 (beautiful) showed the human spirit during the hard time. At a time 8 people across the globe are fighting against the health disease, supporters rose to the challenge of marking Earth Hour with online events. People and social groups across 37 9 (country) posted their pictures and videos on Twitter and Google search. This activity has made it one of the most 10 (success) online events in its history.参考答案一、选择题1-5 BBBCA 6-10 CBCAA二、完型填空1-5 BCACB 6-10 CABAA三、阅读理解1-5 ACDDB四、短文填词1. March2. attention3. an4. from5. working6. included7. beautifully8. when9. countries 10. successful。

八年级英语上册 Units1-2 单元测试题-牛津译林版(含答案)

八年级英语上册 Units1-2 单元测试题-牛津译林版(含答案)

八年级英语上册 Units1-2 单元测试题-牛津译林版(含答案)一.单项选择。

1.Be quick There is only_____________time left.A.fewB. a fewC.littleD.a little2.He went to school without ___________a bus and he___________ his bicycle.A.take, rideB.take , ridesC.taking, rodeD.took , rode3.There are ___________ teachers in our school than .A.more, yoursB.fewer, yoursC.fewer, in yoursD.less, in yours4.If you live near the shopping mall, you ___________go far to buy things.A.have toB.haven’t toC.don’t have toD.needn’t to5.The weather in China is different from .A.in AustraliaB.one in AustraliaC.AustraliaD.that in Australia6. If you ______ early, I won’t keep Tim ______ for long.A. will wake me up, wait for meB. wake up me, waiting for meC. will wake up me, waiting meD. wake me up, waiting for me7.—I will give you you some nice picture books ,--Good ,The ________ ,the ________A.more , betterB.many,goodC.most, bestD.much ,worse8. Help __________ to the cakes I made, my children.A. youB. yourselfC. yourselvesD. yours9. Chinese students have __ weeks __in the summertime than American students.A. more; onB. fewer; onC. more; offD. less; off10. —Hey, guys. Do you often have a good time ________ after-school activities?—Of course, we do. And we always have a lot of time ________ soccer.A. to do; to practiceB. doing; practicingC. to do; practicingD. doing; to practice11. The teacher always ______ a smile on her face, so the students never feel_______A. puts on; frightenedB. wears; frightenedC. puts on; frighteningD.wears;frightening12.I don’t like this pair of glasses. Please show me ________A.the other oneB.other pairC.another oneD.another pair13.When I walk the classroom ,all the students are listening carefully.A.passed,B.to passC.pastD.pass二、词汇运用1.My father ________(驾驶) me to school every morning last year.2.Now ________(英式) schools are very popular in China.3. Hold on to your __________________(梦想). One day they may come true.4. —What other people can you see in this picture ?—Lots of _________________(运动员)5.Time seems___________ (go) quickly when we are having a holiday.6. Yue Fei is one of the national ________(hero) in our country.7.Her mother allowed her to watch TV (two) a week .8.He looked (angry) at the newspaper just now.三、完形填空A good memory is a great help in learning a language. Everybody ____1____ his own language by remembering what he ____2____ when he is a small child, and some children——like boys and girls who live abroad(国外) ____3____ their parents seem to learn two languages almost as ___4____ as one. In school it is not easy to learn ____5____ second language because the pupils have ____6_____ time for it, and they are busy with other subjects, too.Our mind is rather____7_____ a camera, but it takes photos not only of what we see but also of what we feel, hear, smell and taste. _____8____ we take a real photo with a camera, there is much to do before the photo is finished and ready to ____9_____ to our friends. In the same ____10____ there is much work to do before we can keep a picture forever(永远) in our mind. Memory is the diary that we all carry about with us.( ) 1. A. study B. learns C. watches D. learn from( ) 2. A. hears B. listens C. hear of D. listen to( ) 3. A. in B. on C. together D. with( ) 4. A. easy B. easier C. easily D. much easily( ) 5. A. an B. a C. the D. one( ) 6. A. such little B. so little C. so few D. such few( ) 7. A. same B. as C. like D. unlike( ) 8. A. Where B. Who C. Why D. When( ) 9. A. show B. on show C. gave it D. lend( ) 10. A. idea B. way C. time D. street四、阅读理解Long, long ago there was a very foolish thief. Do you know what he did one day? When he wanted to steal(偷) the bell on his neighbour’s door, he walked up to the door, took hold of(抓住) the bell and pulled hard. The bell made a very loud noise. The thief was afraid and went home.Then he sat down to th ink, “I must do something about the noise,” he said. He thought and thought. At last he had an idea. “Ah, I’ll put some cotton in my ears. Then I won’t be able to hear the noise.”The next day he went to the door of his neighbour, and took hold of the bell. This time he pulled even harder. The bell rang loudly, but the thief did not hear anything. With another hard pull he got the bell out. Just then the neighbour came running out. “Steal my bell? I’ll teach you a lesson(教训),” the angry man shouted. And he h it the thief on the nose.The foolish thief did not know how the neighbour found out he was stealing the bell. “Why did he come out just then?” he wondered(感到疑惑).( )1.The thief was trying to get .A.his neighbourB.his neighbour’s doorbellC.some cottonD.a door with a bell on it ( )2.The thief put some cotton in his ears. He thought it would be for him to steal the doorbell.A. safeB. difficultC.dangerousD. easy( )3. The neighbour ran out probably(很可能) because .A.he knew his doorbell was being stolenB.he thought someone was eager(渴望)to visit himC.He realized(意识到)something strange happenedD.Both B and C( )4. The neighbour hit the thief to .A. give him lessonsB. punish (惩罚) him for stealingC. help him with the bellD. be his teacher( )5. Which of the following is TRUE?A.The thief understood why he was hit on the nose.B.The thief knew why the neighbour came out.C.The thief thought the neighbour could not hear the bell.D.The thief didn’t want to know why the neighbour ran out just at the time he stole the doorbell.五、完成句子。

八年级英语下册 单元清 Units 1~2 单元测试卷

八年级英语下册 单元清 Units 1~2 单元测试卷

Units 1~2单元测试卷得分________卷后分________评价________听力部分(20分)一、听句子,选择恰当的答语。

(5×1分=5分)(C)1.A.No, I can't. B.Yes, I will. C.Yes, you should.(A)2.A.No, I don't. B.I'm sorry. C.Thank you.(B)3.A.To the park. B.I have a fever. C.You should see a doctor.(C)4.A.Yes, please. B.Yes, I'd like some tea.C.Yes, I'd love to.(A)5.A.He takes after his father. B.He looks after his father. C.He likes his father most.二、听短对话,选择正确的图片回答问题。

(5×1分=5分)(A)6.What's the matter with the boy?A.B.C.(A)7.Where is the boy's grandmother?A.B.C.(C)8.How did the woman feel about the story?A.B.C.(A)9.What does Kate do to help the children?A.B.C.(B)10.What did the girl do after class last Friday?A.B.C.三、听长对话,选择正确的答案。

(5×1分=5分)听下面一段对话,回答第11、12小题。

(C)11.How did Kevin feel?A.Upset. B.Bored. C.Tired.(A)12.What did Jane advise Kevin to do?A.To go to bed early. B.To take some medicine.C.To go to the hospital.听下面一段对话,回答第13~15小题。

人教版七年级上册英语 Units 1-2 单元测试卷

人教版七年级上册英语 Units 1-2 单元测试卷

七年级上册英语Units1-2 单元测试卷Listening test part(共20分)I.听句子,选择最佳应答语。

(每小题1分,共5分)( )1. A. Yes, I am. B. I’m eight. C. I’m fine, thank you. ( )2.A. Good evening! B. Yes, it’s good. C. It’s in the morning. ( )3. A. I see. B. I’m OK. C. Thanks. You too. ( )4. A. Maria. B. My sister. C. Betty Green.( )5. A. Thank you. B. My name is Luke. C. Nice to meet you, too. Ⅱ.听对话,选择最佳答案。

(每小题1分,共5分)( )6. Linda’s sister’s name is .A. MaryB. JennyC. Jane( )7. Kate can see oranges in the picture.A. sixB. sevenC. eight( )8. Gina’s grandpa is in .A. WenzhouB. YangzhouC. Suzhou( )9.Bill’s cousin’s last name is .A.BlackB. WhiteC.Green( )10.It’s now.A.morningB.afternoonC.eveningⅢ.听长对话,选择最佳答案。

(每小题1分,共5分)听下面一段对话回答第11-12小题. ( )11. Alice can see a in the picture.A.penB.dogC.key ( )12.The man (男人) is Alice’s .A.brotherB.fatherC.grandfather 听下面一段对话,回答第13-15小题。

人教版数学1-2单元

人教版数学1-2单元

人教版数学1-2单元
以下是人教版数学一到二单元的重难点总结:
一、第一单元:负数
1. 负数的意义:负数是指小于0 的实数,它与正数相对。

负数可以用来表示欠债、亏损、零下温度等具有相反意义的量。

2. 负数的运算:负数的加法、减法、乘法和除法运算与正数的运算规则类似,只是需要注意符号的变化。

在进行负数运算时,可以使用数轴来帮助理解。

3. 正数和负数的大小比较:正数大于0,负数小于0,正数大于负数。

二、第二单元:百分数(二)
1. 折扣:商品打折是指按原价的百分之几出售商品,如打八折就是按原价的80%出售。

2. 成数:农业收成经常用“成数”来表示,几成就是十
分之几,也就是百分之几十。

3. 税率:应纳税额与各种收入的比率叫做税率。

4. 利率:利息与本金的比值叫做利率。

以上是这两个单元的重难点总结。

四年级语文上册一二单元知识点

四年级语文上册一二单元知识点

四年级语文上册一二单元知识点四年级语文上册一二单元主要包括《同步语文·语文一下(新版)》中的《人与生活》和《传统文化》两个单元。

以下是每个单元的知识点总结。

一、《人与生活》1.观察生活:培养学生观察生活的能力,包括观察事物的特点、形状、颜色等,并通过图表、图片等形式进行观察,从中推理出相关知识。

2.现代生活:介绍现代社会的各种生活现象和事物,如汽车、电梯、手机等,让学生了解和认识现代科技对人们生活的影响。

3.人和动物:通过对人和动物之间相同和不同的地方进行观察和比较,让学生明白人类是动物中的一种特殊生物,具备独特的智慧和能力。

4.班级生活:介绍班级的生活规章制度,培养学生良好的行为习惯和社交礼仪,如遵守纪律、尊重师长和同学、团结互助等。

5.亲戚关系:引导学生了解和认识自己的家庭成员及其关系,了解亲子、兄弟姐妹等亲戚关系,培养学生与亲人和谐相处的意识。

6.学校生活:介绍学校的主要部门及其职责,如班级、教室、图书馆、操场等,让学生了解学校的组织结构和各部门的功能。

7.自我认识:帮助学生认识和了解自己,包括个体与集体、自身特点和优点、自己的生日、姓名等个人信息。

8.生活体验:引导学生结合自身实际,描述自己的生活体验和感受,如家庭成员的喜怒哀乐、社会事件的观感等。

二、《传统文化》1.书法欣赏:介绍中国的传统艺术形式之一——书法,并让学生欣赏和体验书法的美,培养对书法的兴趣和欣赏能力。

2.四书五经:介绍中国古代经典著作《四书五经》,如《论语》、《大学》等,让学生了解中国传统文化的重要组成部分。

3.古诗词欣赏:引导学生欣赏古代诗词作品,如《静夜思》、《登鹳雀楼》等,培养学生对古代文化的热爱和理解能力。

4.赏析民间故事:介绍和学习中国的民间故事,如《白蛇传》、《牛郎织女》等,让学生了解民间传说和民间文化。

5.中国传统节日:介绍中国的传统节日,如春节、清明节、中秋节等,让学生了解和体验中国传统文化的节日习俗和风俗。

2023-2024学年人教PEP版英语五年级上册Unit1-Unit2单元测试卷含答案

2023-2024学年人教PEP版英语五年级上册Unit1-Unit2单元测试卷含答案

五年级英语第一学期一、二单元阶段性练习听力部分一、听句子,选出你所听到的单词。

(10★) ( )1.A.shy B funny C.strict ( )2.A.finish B. robot C. feet( )3.A.science teacher B.PE teacher C. art teacher ( )4.A. Tuesday B.Thursday C.Saturday ( )5.A.tea B.eat C.read二、听录音,按所听顺序用1-5数字为下列图片标序号。

(10★)( ) ( ) ( ) ( ) ( ) 三、听问句,选择正确的答语。

(10★)( )1.A.I have maths and music B.I.like Chinese. ( )2.A.He's clever. B.She is 42 ( )3.A.No,I don't B.Yes,they do. ( )4.A.Yes,he is. B.She's old,( )5 A.It's very nice. B.She is the head teacher.四、听音选择。

听对话录音,根据听到的内容选择正确的答案,并将其标号填到题前的括号内。

(10★)( )1.John has_____ on Tuesdays.puter and PEB.artputer and maths ( )2.Mr Green is_______.A.kind.B.young C .strict ( )3.Amy often _____ on the weekend.A.plays sportsB.watches TVC.draws pictures ( )4.It's____ in Moscow.A. windy and coolB.cloudyC.cool and rainy ( )5. The man is Mike's_______.A.fatherB.new teacherC.friend笔试部分五、A 部分:读一读,选出每小题中与其他选项不同类的一项。

人教版二年级数学下册第1--2单元达标检测卷附答案

人教版二年级数学下册第1--2单元达标检测卷附答案

人教版二年级数学下册第1--2单元达标检测卷一、用心填一填。

(每空1分,共19分)1.用三六十八这句口诀计算的除法算式有()和()。

2.30里面有()个5,()里面有4个3。

3.把24朵花每6朵插一个花瓶,可以插()个花瓶,列算式是()。

4.计算20÷5时,想口诀(),商是()。

5.15个,每3个一份,可以分成()份。

6.20个,平均分成5份,每份()个。

7.从12里连续减()个3,结果是0。

8.一共有()个苹果,每()个一份,可以分()份。

9.下面是小红调查的本班同学掉牙的情况。

(1)全班一共有()人。

(2)掉()颗牙的人数最少。

(3)掉()颗牙的人数和掉()颗牙的人数相等。

(4)我掉了()颗牙。

二、精心辨一辨。

(对的画“√”,错的画“×”)(每题1分,共5分) 1.计算12÷6时,要想的口诀是二六十二。

()2.6÷2=3读作:6除2等于3。

() 3.把8个苹果平均分成4份,求1份是多少,用除法计算。

() 4.30÷6=5和30÷5=6表示的意义相同。

() 5.红、黄、蓝三种颜色的花一样多,一共有18朵,黄花有6朵。

()三、静心选一选。

(把正确答案的字母填在括号里)(每题1分,共5分) 1.下面的分法中,是平均分的是()。

2.被除数是6,除数是3,商是()。

A.18B.2C.33.下面的算式的商不是1的是()。

A.8÷8 B.12÷4 C.1÷14.和12÷2用同一句乘法口诀计算的是()。

A.12÷6 B.3×4 C.12÷35.20里面有4个()。

A.5 B.4 C.16四、细心算一算。

(共26分)1.直接写得数。

(每题0.5分,共6分)12÷3=4×5=30÷6=15÷5=30+5=56-7=6×2=8÷4=25-5=5×7=5×6=5÷5=2.在里填上“>”“<”或“=”。

六年级上英语1-2 单元知识点

六年级上英语1-2 单元知识点

六年级上复习资料Unit 1 单词重点句型:1.Where is the museum shop?I want to buy a postcard.博物馆商店在哪里?我想买一张明信片。

(想做某事)2.-It’s near the door. 它在门附近。

3. Where is the science museum? 科学博物馆在哪里?4. It’s next to the bookstore.它在书店旁边。

5.Where is the Italian restaurant?意大利餐厅在哪里?6. It’s next to the park on Dongfang Street.它在东方街上的公园附近。

7. How can we get there? 我们怎么到达那里?8. Turn left at the bookstore. Then turn right at the hospital.到书店左转,再到医院右转。

9.感叹句:What a great museum! 多么宏伟的一座博物馆啊!What an interesting film!多么有趣的一部电影啊!Unit 2 单词重点句型:1.How do you come to school?你怎么来的学校?(go to school去学校)ually, I come on foot. Sometimes, I come by bus. 我通常走路来,有时坐公交。

3.I often come to school by bike.我骑自行车来的学校。

4.—How do you get to the USA from China?你怎么从中国到美国?—By plane. 乘飞机。

5.Let’s go to the nature park. 让我们一起去自然公园。

6.How do we get there? 我们怎么到哪里?-By bus. 坐公交。

牛津译林9A Unit1-2 单元复习测试卷(有答案)

牛津译林9A Unit1-2 单元复习测试卷(有答案)

牛津译林版9A Unit 1-2单元复习一、单项选择题(1*15)1. The notice _______that we can’t take photos here.A. tellsB. speaksC. saysD. talks2. He is modest in our class and he never ________.A. show offB. gets offC. takes offD. shows off3. --I’d like you to talk about the Great Wall. -I’m sorry, but ___Jack____ I have been there.A. Either.. orB. neither …norC. not only…but alsoD. both..and4. Look! Many people ______the park ______the lost child.A. are searched; onB. are searching for; onC. searching for; forD. are searching ; for5. –I wonder ________. -Yes, of course.A. Where we can buy the partsB. How often you hear from your sisterC. If I may have a word with youD. Why he arrived late yesterday6. The population (人口) of China is ____than ____country in the world.A. much larger: anyB. more larger; any otherC. much larger; any otherD. larger; the other7. The doctor devoted all the time he had _______ others.A. to helpB. helpingC. helpedD. to helping8. Tom, ______ afraid of speaking in front of people. You are the best one.A. don’tB. notC. not beD. don’t be9. –Sorry, Mr li, I ______my homework at home.--Remember _____ it to school.A. left; to bringB. forget; to takeC. lost; to bringD. forgot; to bring10. By the time I got there, the football match ______already _______.A. has; finishedB. was; finishedC. had; finishedD. had; been finished11. It is our country _______makes us feel proud.A. whoB. thatC. whichD. A&B12.—Don’t forget to bring my wishes to your parents. - _______.A. Yes, I doB. No, I don’tC. Yes, I don’tD. No, I won’t.13.—Can he get first in the coming exam? --- _______. If he practices more, he may make it.A. Of course.B. Sure.C. That dependsD. You guess.14. I ____her _____win the match.A. hope; toB. hope; /C. wish; toD. wish; /15. His uncle would rather _______the old bike than ____a new one.A. repair; to buyB. to repair; buyC. repair; buyD. to repair; to buy二、完形填空(1*15)According to Dr Julie , the way we use colors in our homes is very important. Science has proved(证明) that colors can _16___our moods. It is important to __17__about the relationship between colors and the way we feel when we __18__our homes. Usually , the colors in your house are 19____by the country where you live. For example , a house in a __20__ country like Spain is often painted white or _21_____. These are cool colors. A house in England would often need a warm color __22__yellow or orange. However. Dr Julie says that we need to think more about _23____the room is used for before choosing a color. A bedroom should __24__be green or red because you need to feel __25___and peaceful in the bedroom. White is a great color for a bedroom because it can help __26___stress(压力)。

6上数学1--2单元易错题 - 含答案

6上数学1--2单元易错题 - 含答案

六上数学1—2单元易错题一、填空.1.在一个长21分米,宽9分米的长方形纸板上.剪半经是1.5分米的圆,最多可以剪( 21 )个.2. 3:5的前项扩大到原来的2倍,要使比值不变,后项应(扩大到原来的2倍).如果后项增加10,要使比值不变,前项应 ( 增加6 ).3.甲数的2/3等于乙数的3/4,甲数:乙数=( 9 ):( 8 ).4.把6×20=24×5改写成比例式,比值最多有( 8 )个,其中比值最大的一个比例是( 20:5=24:6 )、比值最小的比例是( 24:20=6:5 ).5.把一个圆平均分成六个相等的扇形.每个扇形的圆心是( 60 )度.6.a和b均不为0,如果a=1/6 b,改写成比例是( a:b=1/6:1 ).7.比例中两个内项的乘积是最小的合数,其中一个外项是4/7,另一个外项是( 7 )、8.甲、乙两班共有学生104人,如果两班各转走2人,则甲乙两班人数的比是11:9,原来乙班有( 47 )人.9.甲乙丙三人赛跑,甲比乙快1/5,乙比丙慢1/5,甲,乙、丙三人比是( 6:5:4 ).二、计算:1.化简比: 0.8:0.5=8:5 25:12.5=2:1 0.35:7/5=1:4 1/20: 1/4=1:52.求比值: 3/8 :1/2=3/4 0.9:0.03=30 0.625:3/16=10/3 20分钟:3/4小时=4/93.解比例:2/7:x=4:0.2 x/3.5= 18/7 3/1.4=2.5/x 18/x=3/10:5X=1/70 x=9 x=7/6 x=300三、解决问题:1.一个长方体的棱长和是108厘米,长.宽、高的比是4:3:2,它的体积是多少?108÷ 4=27(厘米) 4+3+2=9 27×4/9=12(厘米) 27x3/9=9 (厘米)27x2/9=6(厘米)12x9x6=648 (立方厘米)2、用一根长192厘米的铁丝焊成一个长方体框架,长宽高的比是3:2:1、求长方体体积? 192÷4=48 厘米 48x 3/6=24l厘米 48x2/6=16厘米 48x1/6=824x16x8=3072 立方厘米3.一个三角形的周长是48厘米,三条边的比是3:5:4.三条边的长度分别是多少厘米?3+4+5=12 48x3/12=12厘米 48x5/12=20厘米 48x4/12=16厘米4.一个等腰三角出顶角与底角的度数比为5:2,这个三角形三个内角各是多少度?5+2+2=9 顶角:180°x5/9=100°底角 180°x2/9=40°5、甲乙丙三个数的平均数是80.甲、乙丙三个数的比是5:2.1.求甲.乙丙名是多少?80x3=240 5+2+1=8 240x5/8=150 240x2/8=60 240x1/8=306.六(4)班有44人,男生人数的3/5与女生人数的1/2相等,六(4)班男生和姓各有多少名? 3/5男=1/2女男:女 =1/2 :3/5 =5:6 男: 44x5/5+6=20人7.水果店有香蕉36千克,香蕉和苹果的质量比是4:9、香蕉和苹果一共有多少千克?4+9=13 36÷4/13=117千克8.打印一份稿件.计划10小时打完,结果只用了8小时,实际每小时比计划每小时多打印6份稿件,这批稿件共多少份?8x6÷(10—8)=24份 24x10=240 份9.被减数、减数.差的和是52,减数与差的比是6:7,减数是多少?被减数=6+7=13 13+7+6=26 减数 52x6/26=1210.甲乙两车间的人数比为7:6,从甲车间调入乙车间36人后,甲、乙两车间的人数比为2:3,甲、乙两车间原来各有多少人?甲原来占总数:7/7+6=7/13 后来占总数 2/2+3=2/5 36÷( 7/13—2/5)=270人。

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08电子(5)1—2单元习题一.短语翻译(10分)1. 盼望——————2. 登记,报到——————3. 寻找——————4.依赖,依靠——————5. 共同之处——————二。

单项选择(共20小题,每题1分,共计20分)6 May I came ____?A inB onC atD off7 you had better ______ to school.A.go B to go C going8 They sat in front of their house ____.A laughing and chattingB laugh and chatC chat9 Low- ____ families need government help.A boxB rateC income10 For ____ reason ,he didn’t ac cept the prize .A aB any D two11 I didn’t ____ him because I hadn’t seen him for ten years.A helpedB recognizeC sees12 Let’s do ____ for our weekend .A excitingB something excitingC something13 I don’t think ____ the lecture is worth listening to .A thatB whereC when14 ____,could you tell me how to get to the railway station?A Excuse meB ThanksC ok15 _____ he said at the meeting is true.A WhenB WhatC Where16 He made me ____it all over again.A to doB doingC do17 I want ____ the house where my grandfather was born.A to seeB seeingC see18 ----Do you remember ____he came ?-----Yes ,I do ,he came by car.A whatB howC why19 That is ____ the teacher told us at the meeting .A whatB howC why20 Do you know ____he is absent today.A whatB howC why21 It is said ____he was got his visa to the USA.A whatB thatC why22 What about ____ a rest.?A haveB to haveC having23 I did what I could to take care ___ the orphan.A ofB asC byD to24 I don’t doubt that we will ____the match.A winB to winC by25 He was not a _____man A busy B busily C busierIII 完型填空(共10小题,每题1分,共计1分)It's a fine Sunday morning. There are many people in the park. Many of 26 are youngand 27 are old.Some Young Pioneers are playing games over there. Two boys are playing 28 their to-yos. A girl is flying a kite. Two children are 29 a toy boat. There is a lake in the park. The water is clear. There are some 30 on the lake. Near the lake a young man is reading. There is a house near the lake. Beside 31 house two men are working. A woman is watering the flowers. Look at that big tree. There are some birds 32 it. Under it are some men. Four of them are playing cards. One of them is 33 two cats. The cats are running up the tree. What do they want to do? They want to 34 the birds. What 35 can you see in the park?26. A. they B. them C. their D. theirs27. A. some B. other C. the other D. much28. A. to B. on C. with D. for29. A. doing B. making C. flying D. reading30. A. birds B. ships C. buses D. boats31. A. a B. an C. the D. /32. A. in B. on C. under D. at33. A. in B. looking like C. look at D. looking at34. A. give B. take C. bring D. catch35. A. about B. else C. other D. the otherIV 情景交际(共15小题,每题1分,共计15分)36. Are you with me?A .How do you do . B. Yes, I am C Four. D He’s well ,thank you.37. What does he do?A . It's the year of 2007. B. I’m sixteen years old.C He's a student.D He’s well ,thank you.38. What day is today?A . It's the year of 2007. B. It’s Saturday.C He's a student.D Come in, please.39. How do you do ?A . It's the year of 2007. B. It’s Saturday.C How do you doD Come in, please.40 . What year is this?A . It's the year of 2007. B. Good afternoon!C How do you doD Come in, please.41 .How many seasons are there in year?A . Thanks, the same to you. B. FourC How do you doD Come in, please.42 .Nice to meet you ?A . It's Kate's. B. I’m sixteen years old.C Nice to meet you ,too.D Come in, please.43 .How old are you?A . It's Kate's. B. I’m sixteen years old.C It's an air-conditionerD Come in, please.44 . May I come in?A . It's Kate's. B. Good afternoon!C How do you doD Come in, please.45 . Whose pen is this?A . It's Kate's. B. I’m sixteen years old.C It's an air-conditionerD Come in, please.46 Good afternoon!A . It's the year of 2007. B. Good afternoon!C How do you doD Come in, please.47 . How is your father?A .How do you do . B. Yes, I am C Four. D He’s well ,thank you.48 What's this?A . Is this yours? B. I’m sixteen years old.C It's an air-conditionerD Come in, please.49 .Have a good weekend.A . Thanks, the same to you. B. FourC How do you doD Come in, please.50 . Is this yours?A . No, It's Kate's. B. I’m sixteen years old.C Nice to meet you ,too.D Come in, please.V 阅读理解(共10小题,每题2分,共计20分)“Depend on yourself” is what nature says to every man. Parents can help you. Teachers can help you, but all these only help you to help yourself.There have been many great men in history, but many of them were very poor in childhood, and had no uncles, aunts or friends to help them. Schools were few and not very good. They could not depend upon them for education. They saw how it was, and set to work with all their might (力量) to know something. They worked their own way up to fame.One of the most famous teachers in England used to tell his pupils,“I can not make worthymen of you, but I can help make men of yourself.”Some young men don’t try their best to make themselves valuable to the human beings. They can never achieve (取得) achievements unless they see their weak points and change their course. They are nothing now, and will be nothing as long as they live, unless they accept the advice of their parents and teachers, and depend on their own efforts.51. which of the following fits this article best?A. Depending on yourselfB. waiting for others to help youC. asking your parents for helpD. great efforts to learn and work52. Many of the great men in history succeeded because________.A. they were very poor in childhoodB. they could not depend on schoolsC. they made great efforts to learn and workD. find a way to fame53. According the famous teacher in England, a teacher can_________.A. make his pupils worthy menB. help his pupils to find a way to fameC.help his pupils make themselves useful menD. find a way to fame54. -----What does “pupils” mean?------It means “_______”A studentsB teacherC all the year round D. Depending on yourself55.If young people depend on their own efforts, they__________.A. can live without their families B .no longer need helpC. can be successful in their livesD. asking your parents for helpMr. Johnson had never been up in an airplane before and he had read a lot about air accidents , so one day when a friend offered to take him for a ride in his own small plane , Mr. Johnson was very worried about accepting .Finally ,however, his friend persuaded him that it was very safe , and Mr. Johnson boarded the plane.His friend started the engine and began to taxi onto the runway of the airport. Mr. Johnson was very frightened and closed his eyes.After a minute or two he open them again ,looked out of the window of the plane ,and said to his friend ,’’look at those people down there, They look as small as ants ,don’t they?’’“Those are ants ,” answered his friend.”We are still on the ground.”56 The best headline for the passage is________.A. First flightB. First tripC. First accident D He’s well ,thank you.57. When his friend suggested an airplane trip to Mr. Johnson , he _______.A. accepted gladlyB. accepted unwillinglyC. showed his surprise D Come in, please.58. When Mr. Johnson opened his eyes , the plane _________A. took offB. was out of orderC. was still taxiing along the runway D He’s well ,thank you.59. Mr. Johnson imagined himself to be ________when he saw the ants.A. flying highB. on the groundC. dreaming D He’s well ,thank you.60. Mr. Johnson seems to be a _____ manA. happyB. angryC. shy and easily frightened D happy and. angry第二部分非选择题VI翻译(共5小题,每题2分,共计10分)61Look forward to seeing you .62He is a busy young man._63Who is your best friend?64Mr. Baker was a 65—year—old man.65It is said that English people are cold.VII写作(共计20分)写一封E-mail向你的笔友Mary介绍一下你自己((包括姓名、年龄、家庭、兴趣、爱好、朋友和喜好。

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