08级第11周 第二学期 期中考试卷B

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厦门2024年08版小学第11次英语第五单元期中试卷

厦门2024年08版小学第11次英语第五单元期中试卷

厦门2024年08版小学英语第五单元期中试卷考试时间:100分钟(总分:120)B卷考试人:_________题号一二三总分得分一、选择题(共计20题,共40分)1、What is a toy that you can stack?什么玩具可以叠起来?A, BlocksB, DollC, PuzzleD, Car2、What is the color of snow?雪的颜色是什么?A, Blue / 蓝色B, White / 白色C, Green / 绿色D, Yellow / 黄色3、What do you use to write?你用什么来写字?A, BrushB, PenC, RulerD, Paper4、What do you call a place where you can watch performances?我们称之为可以观看表演的地方叫什么?A, TheaterB, Concert hallC, StageD, All of the above5、Which bird is known for its colorful feathers?哪种鸟以其五彩斑斓的羽毛而闻名?A, SparrowB, PeacockC, EagleD, Pigeon6、What do we call a plant that is cultivated for food production?我们称为食物生产而栽培的植物为?A, CropB, WeedC, Ornamental plantD, Flowering plant7、Which insect is known for its ability to producehoney?哪种昆虫以能够生产蜂蜜而闻名?A, Butterfly (蝴蝶)B, Ant (蚂蚁)C, Bee (蜜蜂)D, Mosquito (蚊子)8、What color is an orange?A, BlueB, OrangeC, Green9、我有一只鸭子。

2020-2021学年人教版八年级下学期期中考试数学试卷及答案解析

2020-2021学年人教版八年级下学期期中考试数学试卷及答案解析

2020-2021学年八年级下期中考试数学试卷一.选择题(共10小题,满分30分,每小题3分)1.如果b>a>0,那么()A.−1a>−1b B.1a<1bC.−1a<−1b D.﹣b>﹣a2.下列图形中,不是中心对称图形的是()A.B.C.D.3.下列等式从左到右的变形属于因式分解的是()A.a2﹣2a+1=(a﹣1)2B.a(a+1)(a﹣1)=a3﹣aC.6x2y3=2x2•3y3D.x2+1=x(x+1 x)4.在三角形内部,且到三角形三边距离相等的点是()A.三角形三条中线的交点B.三角形三条高线的交点C.三角形三条角平分线的交点D.三角形三边垂直平分线的交点5.如图,△ABC中,AB=AC,D是BC中点,下列结论中不正确的是()A.∠B=∠C B.AD⊥BC C.AD平分∠BAC D.AB=2BD 6.如果点P(m,1﹣2m)在第一象限,那么m的取值范围是()A.0<m<12B.−12<m<0C.m<0D.m>127.如图,等腰△ABC的周长为21,底边BC=5,AB的垂直平分线DE交AB于点D,交AC于点E,则△BEC的周长为()A.13B.16C.8D.108.如图,锐角三角形ABC中,BC>AB>AC,小靖依下列方法作图:(1)作∠A的角平分线交BC于D点.(2)作AD的中垂线交AC于E点.(3)连接DE.根据他画的图形,判断下列关系何者正确?()A.DE⊥AC B.DE∥AB C.CD=DE D.CD=BD9.如图,一次函数y=kx+b与y=﹣x+5的图象的交点坐标为(2,3),则关于x的不等式﹣x+5>kx+b的解集为()A.x<2B.x<3C.x>2D.x>310.如图,在等边△ABC中,D是边AC上一点,连接BD,将△BCD绕点B逆时针旋转60°,得到△BAE,连接ED,下列结论正确的有()个.①△BED是等边三角形;②AE∥BC;③△ADE的周长等于BD+BC;④∠ADE=∠DBC.A .1B .2C .3D .4二.填空题(共4小题,满分16分,每小题4分)11.(4分)若√x −3在实数范围内有意义,则x 的取值范围是 .12.(4分)把多项式﹣16x 3+40x 2y 提出一个公因式﹣8x 2后,另一个因式是 .13.(4分)若不等式组{x >a x >3的解集为x >3,则a 的取值范围是 . 14.(4分)如图,在△ABC 中,∠ABC =90°,AB =BC =2,∠BAC ,∠ACB 的平分线相交于点E ,过点E 作EF ∥BC 交AC 于点F ,则EF 的长为 .三.解答题(共6小题,满分54分)15.(10分)因式分解:(1)m 2﹣4n 2;(2)2a 2﹣4a +2.16.(12分)解不等式组{2(x −2)+1≥−5x 3−x+12>−1,并把解集在数轴上表示出来. 17.(6分)如图,∠BAD =∠CAE =90°,AB =AD ,AE =AC ,AF ⊥CB ,垂足为F .(1)求证:△ABC ≌△ADE ;(2)求∠F AE 的度数;(3)求证:CD =2BF +DE .18.(6分)如图,在平面直角坐标系中,△ABC的三个顶点的坐标分别为A(﹣3,3),B(﹣2,1),C(1,2).(1)把△ABC绕原点O旋转,使点C与点C1(2,﹣1)重合,画出旋转后的△A1B1C1,并写出点A1,B1的坐标;̂(2)在(1)的条件下,若△ABC是按顺时针方向旋转的,求点A到点A1经过的路径AA1的长.19.(10分)在奉贤创建文明城区的活动中,有两段长度相等的彩色道砖铺设任务,分别交给甲、乙两个施工队同时进行施工.如图是反映所铺设彩色道砖的长度y(米)与施工时间x(时)之间关系的部分图象.请解答下列问题:(1)求乙队在2≤x≤6的时段内,y与x之间的函数关系式;(2)如果甲队施工速度不变,乙队在开挖6小时后,施工速度增加到12米/时,结果两队同时完成了任务.求甲队从开始施工到完工所铺设的彩色道砖的长度为多少米?20.(10分)思维启迪:(1)如图①,A,B两点分别位于一个池塘的两端,小亮想用绳子测量A,B间的距离,但绳子不够长,他出一个办法:先在地上取一个可以直接到达B点的点C,连接BC,取BC的中点P(点P可以直接到达A点),利用工具过点C作CD∥AB交AP的延长线于点D,此时测得CD=200米,那么A,B间的距离是米.思维探索:(2)在△ABC和△ADE中,AC=BC=4,AE=DE=√2,∠ACB=∠AED=90°,将△ADE绕点A顺时针方向旋转,把点E在AC边上时△ADE的位置作为起始位置(此时点B和点D位于AC的两侧),设旋转角为α,连接BD,点P是线段BD的中点,连接PC,PE.①如图②,当△ADE在起始位置时,求证:PC⊥PE,PC=PE.②如图③,当α=90°时,点D落在AB边上,PC与PE的数量关系和位置关系分别为.③当α=135°时,直接写出PC的值.四.填空题(共5小题,满分20分,每小题4分)21.(4分)若x=√2−1,则x2+2x+1=.22.(4分)若x2+2(m﹣3)x+36是完全平方式,则m的值等于.恰有3个整数解,则a的取值范围是.23.(4分)已知关于x的不等式组{2a+3x>03a−2x≥024.(4分)如图,在第1个△A1BC中,∠B=30°,A1B=CB;在边A1B上任取一点D,延长CA1到A2,使A1A2=A1D,得到第2个△A1A2D;在边A2D上任取一点E,延长A1A2到A3,使A2A3=A2E,得到第3个△A2A3E,…按此做法继续下去,则第n个三角形中以A n为顶点的底角度数是.25.(4分)如图,已知Rt △ABC 中,∠B =90°,∠A =60°,AB =3,点M ,N 分别在线段AC ,AB 上,将△ANM 沿直线MN 折叠,使点A 的对应点D 恰好落在线段BC 上,若△DCM 为直角三角形时,则AM 的长为 .五.解答题(共3小题,满分30分)26.(8分)甲、乙两人同时解方程组{mx +y =5①2x −ny =13②甲解题看错了①中的m ,解得{x =72y =−2,乙解题时看错②中的n ,解得{x =3y =−7,试求原方程组的解. 27.(10分)为了迎接“十•一”小长假的购物高峰.某运动品牌专卖店准备购进甲、乙两种运动鞋.其中甲、乙两种运动鞋的进价和售价如下表:运动鞋价格甲 乙进价(元/双)m m ﹣20 售价(元/双) 240 160 已知:用3000元购进甲种运动鞋的数量与用2400元购进乙种运动鞋的数量相同.(1)求m 的值;(2)要使购进的甲、乙两种运动鞋共200双的总利润(利润=售价﹣进价)不少于21700元,且不超过22300元,问该专卖店有几种进货方案?(3)在(2)的条件下,专卖店准备对甲种运动鞋进行优惠促销活动,决定对甲种运动鞋每双优惠a (50<a <70)元出售,乙种运动鞋价格不变.那么该专卖店要获得最大利润应如何进货?28.(12分)一次函数y=kx+b(k≠0)的图象与x轴、y轴分别相交于点A(﹣8,0)和点B(0,6).点C在线段AO上.如图,将△CBO沿BC折叠后,点O恰好落在AB边上点D处.(1)求一次函数的解析式;(2)求AC的长;(3)点P为y轴上一点.且满足△ABP是以AB为腰的等腰三角形,请直接写出P点坐标.2020-2021学年八年级下期中考试数学试卷参考答案与试题解析一.选择题(共10小题,满分30分,每小题3分)1.如果b>a>0,那么()A.−1a>−1b B.1a<1bC.−1a<−1b D.﹣b>﹣a【解答】解:∵b>a>0,∴1b <1a,故选项B错误∴−1b>−1a,故选项A错误、C正确;∵b>a,∴﹣b<﹣a,故选项D错误.故选:C.2.下列图形中,不是中心对称图形的是()A.B.C.D.【解答】解:A、是中心对称图形,故本选项错误;B、不是中心对称图形,故本选项正确;C、是中心对称图形,故本选项错误;D、是中心对称图形,故本选项错误;故选:B.3.下列等式从左到右的变形属于因式分解的是()A.a2﹣2a+1=(a﹣1)2B.a(a+1)(a﹣1)=a3﹣aC.6x2y3=2x2•3y3D.x2+1=x(x+1 x)【解答】解:A、是因式分解,故本选项符合题意;B、不是因式分解,故本选项不符合题意;C、不是因式分解,故本选项不符合题意;D、不是因式分解,故本选项不符合题意;故选:A.4.在三角形内部,且到三角形三边距离相等的点是()A.三角形三条中线的交点B.三角形三条高线的交点C.三角形三条角平分线的交点D.三角形三边垂直平分线的交点【解答】解:在三角形内部,且到三角形三边距离相等的点是三角形三条角平分线的交点.故选:C.5.如图,△ABC中,AB=AC,D是BC中点,下列结论中不正确的是()A.∠B=∠C B.AD⊥BC C.AD平分∠BAC D.AB=2BD【解答】解:∵△ABC中,AB=AC,D是BC中点∴∠B=∠C,(故A正确)AD⊥BC,(故B正确)∠BAD=∠CAD(故C正确)无法得到AB=2BD,(故D不正确).故选:D.6.如果点P(m,1﹣2m)在第一象限,那么m的取值范围是()A.0<m<12B.−12<m<0C.m<0D.m>12【解答】解:∵点P(m,1﹣2m)在第一象限,∴{m>0①1−2m>0②,由②得,m<1 2,所以,m的取值范围是0<m<1 2.故选:A.7.如图,等腰△ABC的周长为21,底边BC=5,AB的垂直平分线DE交AB于点D,交AC于点E,则△BEC的周长为()A.13B.16C.8D.10【解答】解:∵△ABC是等腰三角形,底边BC=5,周长为21,∴AC=AB=8,又∵DE是AB的垂直平分线,∴AE=BE,∴△BEC的周长=BE+CE+CB=AE+CE+BC=AC+CB=13,∴△BEC的周长为13.故选:A.8.如图,锐角三角形ABC中,BC>AB>AC,小靖依下列方法作图:(1)作∠A的角平分线交BC于D点.(2)作AD的中垂线交AC于E点.(3)连接DE.根据他画的图形,判断下列关系何者正确?()A.DE⊥AC B.DE∥AB C.CD=DE D.CD=BD 【解答】解:依据题意画出右图可得知∠1=∠2,AE=DE,∴∠2=∠3,∴∠1=∠3,即DE∥AB.故选:B.9.如图,一次函数y=kx+b与y=﹣x+5的图象的交点坐标为(2,3),则关于x的不等式﹣x+5>kx+b的解集为()A.x<2B.x<3C.x>2D.x>3【解答】解:∵一次函数y=kx+b与y=﹣x+5的图象的交点坐标为(2,3),∴当x<2时,﹣x+5>kx+b,即关于x的不等式﹣x+5>kx+b的解集为x<2.故选:A.10.如图,在等边△ABC中,D是边AC上一点,连接BD,将△BCD绕点B逆时针旋转60°,得到△BAE,连接ED,下列结论正确的有()个.①△BED是等边三角形;②AE∥BC;③△ADE的周长等于BD+BC;④∠ADE=∠DBC.A.1B.2C.3D.4【解答】解:∵将△BCD绕点B逆时针旋转60°,得到△BAE,∴BE=BD,∠EBD=60°,AE=CD,∠EAB=∠C=60°,∴△BED是等边三角形,故①正确;∵∠BAE=∠C=∠ABC=60°,∴AE ∥BC ,故②正确;∵△BED 是等边三角形,∴DE =BD ,∠EDB =60°,∴△ADE 的周长=AE +AD +DE =CD +AD +DE =AC +BD =BC +BD ,故③正确;∵∠ADB =∠C +∠DBC ,∴∠ADE +60°=∠DBC +60°,∴∠ADE =∠DBC ,故④正确.故选:D .二.填空题(共4小题,满分16分,每小题4分)11.(4分)若√x −3在实数范围内有意义,则x 的取值范围是 x ≥3 .【解答】解:根据题意得x ﹣3≥0,解得x ≥3.故答案为:x ≥3.12.(4分)把多项式﹣16x 3+40x 2y 提出一个公因式﹣8x 2后,另一个因式是 2x ﹣5y .【解答】解:﹣16x 3+40x 2y=﹣8x 2•2x +(﹣8x 2)•(﹣5y ) =﹣8x 2(2x ﹣5y ),所以另一个因式为2x ﹣5y .故答案为:2x ﹣5y .13.(4分)若不等式组{x >a x >3的解集为x >3,则a 的取值范围是 a ≤3 . 【解答】解:不等式组{x >a x >3的解集为x >3,则a ≤3. 故答案为:a ≤3.14.(4分)如图,在△ABC 中,∠ABC =90°,AB =BC =2,∠BAC ,∠ACB 的平分线相交于点E ,过点E 作EF ∥BC 交AC 于点F ,则EF 的长为 2−√2 .【解答】解:过E作EG∥AB,交AC于G,则∠BAE=∠AEG,∵AE平分∠BAC,∴∠BAE=∠CAE,∴∠CAE=∠AEG,∴AG=EG,同理可得,EF=CF,∵AB∥GE,BC∥EF,∴∠BAC=∠EGF,∠BCA=∠EFG,∴△ABC∽△GEF,∵∠ABC=90°,AB=BC=2,∴AC=2√2,∴EG:EF:GF=AB:BC:AC=1:1:√2,设EG=k=AG,则EF=k=CF,FG=√2k,∵AC=2√2,∴k+k+√2k=2√2,∴k=√2(2−√2),∴EF=k=2−√2.故答案为:2−√2.三.解答题(共6小题,满分54分)15.(10分)因式分解:(1)m 2﹣4n 2;(2)2a 2﹣4a +2.【解答】解:(1)m 2﹣4n 2=m 2﹣(2n )2=(m +2n )(m ﹣2n );(2)2a 2﹣4a +2=2(a 2﹣2a +1)=2(a ﹣1)2.16.(12分)解不等式组{2(x −2)+1≥−5x 3−x+12>−1,并把解集在数轴上表示出来. 【解答】解:{2(x −2)+1≥−5x 3−x+12>−1, 解第一个不等式得x ≥﹣1,解第二个不等式得x <3,则不等式组的解集为﹣1≤x <3,将解集表示在数轴上如下:17.(6分)如图,∠BAD =∠CAE =90°,AB =AD ,AE =AC ,AF ⊥CB ,垂足为F .(1)求证:△ABC ≌△ADE ;(2)求∠F AE 的度数;(3)求证:CD =2BF +DE .【解答】证明:(1)∵∠BAD =∠CAE =90°,∴∠BAC +∠CAD =90°,∠CAD +∠DAE =90°,∴∠BAC =∠DAE ,在△BAC 和△DAE 中,{AB =AD ∠BAC =∠DAE AC =AE,∴△BAC ≌△DAE (SAS );(2)∵∠CAE =90°,AC =AE ,∴∠E =45°,由(1)知△BAC ≌△DAE ,∴∠BCA =∠E =45°,∵AF ⊥BC ,∴∠CF A =90°,∴∠CAF =45°,∴∠F AE =∠F AC +∠CAE =45°+90°=135°;(3)延长BF 到G ,使得FG =FB ,∵AF ⊥BG ,∴∠AFG =∠AFB =90°,在△AFB 和△AFG 中,{BF =GF ∠AFB =∠AFG AF =AF,∴△AFB ≌△AFG (SAS ),∴AB =AG ,∠ABF =∠G ,∵△BAC ≌△DAE ,∴AB =AD ,∠CBA =∠EDA ,CB =ED ,∴AG =AD ,∠ABF =∠CDA ,∴∠G =∠CDA ,∵∠GCA =∠DCA =45°,在△CGA 和△CDA 中,{∠GCA =∠DCA ∠CGA =∠CDA AG =AD,∴△CGA ≌△CDA (AAS ),∴CG =CD ,∵CG =CB +BF +FG =CB +2BF =DE +2BF ,∴CD=2BF+DE.18.(6分)如图,在平面直角坐标系中,△ABC的三个顶点的坐标分别为A(﹣3,3),B(﹣2,1),C(1,2).(1)把△ABC绕原点O旋转,使点C与点C1(2,﹣1)重合,画出旋转后的△A1B1C1,并写出点A1,B1的坐标;̂(2)在(1)的条件下,若△ABC是按顺时针方向旋转的,求点A到点A1经过的路径AA1的长.【解答】解:(1)如图所示,△A1B1C1即为所求,由图知,将△ABC绕原点O顺时针旋转90°时,得到△A1B1C1,∴点A 1的坐标为(3,3),B 1的坐标为(1,2),(2)∵AO =√32+32=3√2,∠AOA 1=90°,∴点A 到点A 1经过的路径AA 1̂的长为90⋅π⋅3√2180=3√22π. 19.(10分)在奉贤创建文明城区的活动中,有两段长度相等的彩色道砖铺设任务,分别交给甲、乙两个施工队同时进行施工.如图是反映所铺设彩色道砖的长度y (米)与施工时间x (时)之间关系的部分图象.请解答下列问题:(1)求乙队在2≤x ≤6的时段内,y 与x 之间的函数关系式;(2)如果甲队施工速度不变,乙队在开挖6小时后,施工速度增加到12米/时,结果两队同时完成了任务.求甲队从开始施工到完工所铺设的彩色道砖的长度为多少米?【解答】解:(1)设乙队在2≤x ≤6的时段内y 与x 之间的函数关系式为y =kx +b , 由图可知,函数图象过点(2,30),(6,50),∴{2k +b =306k +b =50, 解得{k =5b =20, ∴y =5x +20;(2)由图可知,甲队速度是:60÷6=10(米/时),设甲队从开始到完工所铺设彩色道砖的长度为z 米,依题意,得z−6010=z−5012,解得z =110,答:甲队从开始到完工所铺设彩色道砖的长度为110米.20.(10分)思维启迪:(1)如图①,A ,B 两点分别位于一个池塘的两端,小亮想用绳子测量A ,B 间的距离,但绳子不够长,他出一个办法:先在地上取一个可以直接到达B 点的点C ,连接BC ,取BC的中点P(点P可以直接到达A点),利用工具过点C作CD∥AB交AP的延长线于点D,此时测得CD=200米,那么A,B间的距离是200米.思维探索:(2)在△ABC和△ADE中,AC=BC=4,AE=DE=√2,∠ACB=∠AED=90°,将△ADE绕点A顺时针方向旋转,把点E在AC边上时△ADE的位置作为起始位置(此时点B和点D位于AC的两侧),设旋转角为α,连接BD,点P是线段BD的中点,连接PC,PE.①如图②,当△ADE在起始位置时,求证:PC⊥PE,PC=PE.②如图③,当α=90°时,点D落在AB边上,PC与PE的数量关系和位置关系分别为PC⊥PE,PC=PE.③当α=135°时,直接写出PC的值.【解答】(1)解:∵CD∥AB,∴∠ABP=∠C,∵P是BC的中点,∴PB=PC,在△ABP和△DCP中,{∠ABP=∠CPB=PC∠APB=∠DPC,∴△ABP≌△DCP(ASA),∴AB=CD=200米;故答案为:200;(2)①证明:延长EP交BC于F,如图②所示:∵∠ACB=∠AED=90°,∴DE∥BC,∴∠EDP=∠FBP,∠DEP=∠BFP,∵点P 是线段BD 的中点,∴PB =PD ,在△FBP 和△EDP 中,{∠FBP =∠EDP∠BFP =∠DEP PB =PD,∴△FBP ≌△EDP (AAS ),∴PF =PE ,BF =DE ,∵AC =BC ,AE =DE ,∴FC =EC ,又∵∠ACB =90°,∴△EFC 是等腰直角三角形,∵PE =PF ,∴PC ⊥EF ,PC =12EF =PE ;②解:PC ⊥PE ,PC =PE ;理由如下: 延长ED 交BC 于H ,如图③所示: 由旋转的性质得:∠CAE =90°, ∵∠AED =∠ACB =90°,∴四边形ACHE 是矩形,∴∠BHE =∠CHE =90°,AE =CH , ∵AE =DE ,∴CH =DE ,∠ADE =45°,∴∠EDP =135°,∵∠ACB =90°,AC =BC ,∴∠ABC =45°,∵∠BHE =90°,点P 是线段BD 的中点, ∴PH ⊥BD ,PH =12BD =PD ,△BPH 是等腰直角三角形, ∴∠BHP =45°,∴∠CHP =135°=∠EDP ,在△CPH 和△EPD 中,{CH =ED∠CHP =∠EDP PH =PD,∴△CPH ≌△EPD (SAS ), ∴PC =PE ,∠CPH =∠EPD , ∴∠CPE =∠HPD =90°, ∴PC ⊥PE ;故答案为:PC ⊥PE ,PC =PE ; ③解:当α=135°时,AD ⊥AC , 延长CP ,交AD 延长线于点H , 则AH ∥BC ,∴△BCP ∽△DHP ,∴DH BC =PH PC =PD PB ,∵P 是BD 的中点,∴PD =PB ,∴DH =BC =4,PH =PC , ∵AD =√2AE =2,∴AH =DH +AD =6,∴CH =√AC 2+AH 2=√42+62=2√13, ∴PC =12CH =√13.四.填空题(共5小题,满分20分,每小题4分)21.(4分)若x =√2−1,则x 2+2x +1= 2 .【解答】解:原式=(x +1)2,当x =√2−1时,原式=(√2)2=2.22.(4分)若x 2+2(m ﹣3)x +36是完全平方式,则m 的值等于 9或﹣3 .【解答】解:∵x 2+2(m ﹣3)x +36是完全平方式,∴2(m ﹣3)x =±2•x •6,解得:m =9或﹣3,故答案为:9或﹣3.23.(4分)已知关于x 的不等式组{2a +3x >03a −2x ≥0恰有3个整数解,则a 的取值范围是 43≤a ≤32. 【解答】解:解不等式①得:x >−23a ,解不等式②得:x ≤32a ,则不等式组的解集为−23a <x ≤32a ,由于不等式组有解,则−23a <x ≤32a 必定有整数解0,∵|32a |>|−23a |, ∴三个整数解不可能是﹣2,﹣1,0.若三个整数解为﹣1,0,1,则{1≤32a <2−2≤−23a <−1,此不等式组无解; 若三个整数解为0,1,2,则{2≤32a <3−1≤−23a <0,解得43≤a ≤32, 所以a 的取值范围是43≤a ≤32.故答案为:43≤a ≤32. 24.(4分)如图,在第1个△A 1BC 中,∠B =30°,A 1B =CB ;在边A 1B 上任取一点D ,延长CA 1到A 2,使A 1A 2=A 1D ,得到第2个△A 1A 2D ;在边A 2D 上任取一点E ,延长A 1A 2到A 3,使A 2A 3=A 2E ,得到第3个△A 2A 3E ,…按此做法继续下去,则第n 个三角形中以A n 为顶点的底角度数是 (12) n ﹣1×75° .【解答】解:∵在△CBA 1中,∠B =30°,A 1B =CB ,∴∠BA 1C =180°−∠B 2=75°, ∵A 1A 2=A 1D ,∠BA 1C 是△A 1A 2D 的外角,∴∠DA 2A 1=12∠BA 1C =12×75°; 同理可得∠EA 3A 2=(12)2×75°,∠F A 4A 3=(12)3×75°,∴第n 个三角形中以A n 为顶点的内角度数是(12) n ﹣1×75°. 故答案为:(12) n ﹣1×75°. 25.(4分)如图,已知Rt △ABC 中,∠B =90°,∠A =60°,AB =3,点M ,N 分别在线段AC ,AB 上,将△ANM 沿直线MN 折叠,使点A 的对应点D 恰好落在线段BC 上,若△DCM 为直角三角形时,则AM 的长为 2或3√3−3 .【解答】解:分两种情况:①如图,当∠CDM =90°时,△CDM 是直角三角形,∵在Rt△ABC中,∠B=90°,∠A=60°,AB=3,∴AC=2AB=6,∠C=30°,由折叠可得,∠MDN=∠A=60°,∴∠BDN=30°,∴BN=12DN=12AN,∴BN=13AB=1,∴AN=2BN=2,∵∠DNB=60°,∴∠ANM=∠DNM=60°,∴∠AMN=60°,∴AM=AN=2;②如图,当∠CMD=90°时,△CDM是直角三角形,由题可得,∠CDM=60°,∠A=∠MDN=60°,∴∠BDN=60°,∠BND=30°,∴BD=12DN=12AN,BN=√3BD,又∵AB =3,∴AN =6(2−√3),BN =6√3−9,过N 作NH ⊥AM 于H ,则∠ANH =30°,∴AH =12AN =3(2−√3),HN =6√3−9,由折叠可得,∠AMN =∠DMN =45°,∴△MNH 是等腰直角三角形,∴HM =HN =6√3−9,∴AM =AH +HM =3(2−√3)+6√3−9=3√3−3,故答案为:2或3√3−3.五.解答题(共3小题,满分30分)26.(8分)甲、乙两人同时解方程组{mx +y =5①2x −ny =13②甲解题看错了①中的m ,解得{x =72y =−2,乙解题时看错②中的n ,解得{x =3y =−7,试求原方程组的解. 【解答】解:(1)把{x =72y =−2代入②得:7+2n =13, 解得:n =3,把{x =3y =−7代入①得:3m ﹣7=5, 解得:m =4;把m =4,n =3代入方程组得:{4x +y =5①2x −3y =13②, ①×3+②得:14x =28,即x =2,把x =2代入①得:y =﹣3,则方程组的解为{x =2y =−3. 27.(10分)为了迎接“十•一”小长假的购物高峰.某运动品牌专卖店准备购进甲、乙两种运动鞋.其中甲、乙两种运动鞋的进价和售价如下表:运动鞋价格甲 乙进价(元/双) m m ﹣20售价(元/双) 240 160已知:用3000元购进甲种运动鞋的数量与用2400元购进乙种运动鞋的数量相同.(1)求m 的值;(2)要使购进的甲、乙两种运动鞋共200双的总利润(利润=售价﹣进价)不少于21700元,且不超过22300元,问该专卖店有几种进货方案?(3)在(2)的条件下,专卖店准备对甲种运动鞋进行优惠促销活动,决定对甲种运动鞋每双优惠a (50<a <70)元出售,乙种运动鞋价格不变.那么该专卖店要获得最大利润应如何进货?【解答】解:(1)依题意得,3000m =2400m−20,整理得,3000(m ﹣20)=2400m ,解得m =100,经检验,m =100是原分式方程的解,所以,m =100;(2)设购进甲种运动鞋x 双,则乙种运动鞋(200﹣x )双,根据题意得,{(240−100)x +(160−80)(200−x)≥21700①(240−100)x +(160−80)(200−x)≤22300②, 解不等式①得,x ≥95,解不等式②得,x ≤105,所以,不等式组的解集是95≤x ≤105,∵x 是正整数,105﹣95+1=11,∴共有11种方案;(3)设总利润为W ,则W =(240﹣100﹣a )x +80(200﹣x )=(60﹣a )x +16000(95≤x ≤105),①当50<a <60时,60﹣a >0,W 随x 的增大而增大,所以,当x =105时,W 有最大值,即此时应购进甲种运动鞋105双,购进乙种运动鞋95双;②当a =60时,60﹣a =0,W =16000,(2)中所有方案获利都一样;③当60<a <70时,60﹣a <0,W 随x 的增大而减小,所以,当x =95时,W 有最大值,即此时应购进甲种运动鞋95双,购进乙种运动鞋105双.28.(12分)一次函数y =kx +b (k ≠0)的图象与x 轴、y 轴分别相交于点A (﹣8,0)和点B (0,6).点C 在线段AO 上.如图,将△CBO 沿BC 折叠后,点O 恰好落在AB 边上点D 处.(1)求一次函数的解析式;(2)求AC 的长;(3)点P 为y 轴上一点.且满足△ABP 是以AB 为腰的等腰三角形,请直接写出P 点坐标.【解答】解:(1)由题意可得:{b =6−8k +b =0, ∴{k =34b =6, ∴一次函数的解析式为:y =34x +6;(2)∵点A 的坐标为(﹣8,0),点B 的坐标为(0,6),∴OA =8,OB =6,∵∠AOB =90°,∴AB =√OA 2+OB 2=√36+64=10,由折叠的性质,可知:OC =CD ,OB =BD =6,∠CDB =∠BOC =90°,∴AD =AB ﹣BD =4,∠ADC =90°.设CD =OC =x ,则AC =8﹣x ,在Rt △ADC 中,∠ADC =90°,∴AD 2+CD 2=AC 2,即42+x 2=(8﹣x )2,解得:x =3,∴OC =3,∴AC=OA﹣OC=8﹣3=5;(3)设点P(0,y),当BA=BP=10时,则|y﹣6|=10,∴y=16或﹣4,∴点P(0,16)或(0,﹣4),当AB=AP时,又∵AO⊥BO,∴BO=OP=6,∴点P(0,﹣6),综上所述:点P(0,16)或(0,﹣4)或(0,﹣6).。

2008——2009学年度第二学期期中测试(人教版)

2008——2009学年度第二学期期中测试(人教版)
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2024年08版小学第十一次英语第一单元期中试卷

2024年08版小学第十一次英语第一单元期中试卷

2024年08版小学英语第一单元期中试卷考试时间:60分钟(总分:120)考试人:_________题号一二三总分得分评级介绍:2024年08版小学第十一次英语第一单元期中试卷涵盖基础词汇与语法,难度适中,重点在听说读写综合能力的考查,旨在帮助学生巩固所学知识。

一、(选择题)总分:50分(2分/题)1、What do you call a vehicle that flies?A, CarB, BoatC, AirplaneD, Train2、She is wearing a green scarf. 她戴着一条绿色的围巾。

A, Blue B, Green C, Red3、How do you say "对不起" in English?A, Excuse meB, I'm sorryC, Thank you4、What is the English word for "水平"?A, LevelB, DepthC, HeightD, Width5、What is a popular drink made with tea leaves?A, JuiceB, CoffeeC, TeaD, Soda6、What type of environment do ferns prefer?中文解释:蕨类植物喜欢什么样的环境?A, DryC, Cold7、Which plant is known for its thorns?中文解释:哪种植物以其刺而闻名?A, RoseB, SunflowerC, Maple8、Who is known for saying "I have a dream"? A, Abraham LincolnB, Martin Luther King Jr.C, Nelson MandelaD, Mahatma Gandhi9、Which of these is a winter sport?A, SwimmingB, SkiingC, SurfingD, Running10、What is the English word for "橡树"?A, OakB, BirchC, WillowD, Palm11、What is the English meaning of "音乐"? A, ArtB, MusicC, DanceD, Drama12、问别人来自哪儿,应该说:__________。

八年级下学期期中考试数学试卷(含有答案)

八年级下学期期中考试数学试卷(含有答案)

八年级下学期期中考试数学试卷(含有答案)一.单选题。

(每小题4分,共40分)1.已知x >y ,则下列不等式中,不成立的是( )A.3x >3yB.x -9>y -9C.﹣x >﹣yD.﹣x2<﹣y2 2.下列各式从左到右的变形是因式分解的是( )A.(x -3)(x+1)=x 2-2x -3B.x 2-xy=x (x -y )C.ab+bc+d=b (a+c )+dD.6x 2y=3xy•2x 3.若分式x -1x的值为0,则x 的值是( )A.1B.﹣1C.0D.24.把多项式2a 2-4a 分解因式,应提取的公因式是( ) A.a B.2 C.a 2 D.2a5.已知两个不等式的解集在数轴上如图所示,那么组成的不等式组的解集是( ) A.x >1 B.x ≥﹣1 C.﹣3<x ≤﹣1 D.x >﹣3(第5题图) (第6题图) (第10题图) 6.如图,将△COD 绕点O 按顺时针方向旋转一定角度后得到△AOB ,旋转角为( ) A.∠AOB B.∠BOC C.∠AOC D.∠COD 7.在下列分式的变形中,从左到右一定正确的是( ) A.a b =a+1b+1 B.2a 2b =ab C.a b =a 2b 2 D.a b =acbc 8.下列各式中能用平方差公式因式分解是( )A.﹣4a 2+b 2B.x 2+4C.a 2+c 2-2acD.﹣a 2-b 2 9.如果把xyx+y 中x ,y 的值都扩大2倍,那么这个分式的值( ) A.不变 B.缩小到原来的12 C.扩大4倍 D.扩大2倍10.如图,一次函数y=kx+b 的图象经过点A (﹣1,﹣2)和B (﹣2,0),一次函数y=2x 的图象经过点A ,则不等式2x ≤kx+b 的解集为( )A.x ≤﹣1B.x ≤﹣2C.x ≥1D.﹣2≤x <﹣1 二.填空题。

(每小题4分,共24分) 11.因式分解:a 3-4a 2= 。

12.要使分式2x -5有意义,则x 的取值范围应满足的条件是 .13.已知x+y=5,xy=2,则x 2y+xy 2的值是 .14.如图,将周长为8的△DEF 沿EF 方向平移3个单位长度得到△ABC ,则四边形ABFD 的周长为 .(第14题图)15.若a+1a =4,则a 2+1a 2= . 16.若1a +1b =5,则分式2a -5ab+2b﹣a+3ab -b的值为 .(填序号)①第3分时,汽车的速度是40千米/时;②从第3分到第6分,汽车行驶了120千米;③第12分时,汽车的速度是0千米/时;④从第9分到12分,汽车的速度从60千米/时减少到0千米/时. 三、解答题。

八年级下学期期中考前必刷卷(部编版)(考试版)-基础

八年级下学期期中考前必刷卷(部编版)(考试版)-基础

下学期期中考前必刷卷八年级道德与法治(考试时间:70分钟试卷满分:75分)注意事项:1.本试卷分第Ⅰ卷(选择题)和第Ⅱ卷(非选择题)两部分。

答卷前,考生务必将自己的姓名、准考证号填写在答题卡上。

2.回答第Ⅰ卷时,选出每小题答案后,用2B铅笔把答题卡上对应题目的答案标号涂黑。

如需改动,用橡皮擦干净后,再选涂其他答案标号。

写在本试卷上无效。

3.回答第Ⅱ卷时,将答案写在答题卡上。

写在本试卷上无效。

4.测试范围:部编版第一单元至第四单元5.考试结束后,将本试卷和答题卡一并交回。

第I卷选择题(共33分)一、选择题(在每小题的四个选项中,只有一项最符合题意,请选出该项。

本大题共11个小题,每小题3分,共33分)1.为了强化宪法意识,维护宪法权威,某校举行了宪法知识竞赛。

下列回答完全正确的是( )①宪法规定了哪些内容?答:宪法规定了我国的国家性质、根本制度、根本任务、公民的基本权利和义务、国家机构的组织及其职权等国家生活中最根本、最重要的问题。

②宪法与其他法律的关系是怎样的?答:其他法律是依据宪法制定的,宪法是其他法律的立法基础和依据,任何法律都不得与宪法精神和原则相违背。

③宪法的核心价值和核心价值追求一样吗?答:一样。

都是规范国家权力运行以保障公民权利。

④宪法明确国家的指导思想是什么?宪法明确国家的指导思想是邓小平理论、“三个代表”重要思想、科学发展观、习近平新时代中国特色社会主义思想A.①②B.②③C.③④D.①④2.党的十九大报告中提出:维护国家法制统一、尊严、权威,加强人权法治保障,保证人民依法享有广泛权利和自由。

下列属于国家尊重和保障人权做法的是( )①立法机关在立法过程中丰富公众参与立法的形式②尊重和保障人权成为我国的宪法原则③行政机关在执法过程中树立尊重和保障人权的意识,做到严格规范公正文明执法,坚持依宪施政、依法行政、简政放权④国家加强法治宣传教育A.①②④B.②③④C.①③④D.①②③3.下面是八年级(2)班同学对教材第11页图的解读,其中正确的有( )①图示中的“人民”指的是年满18周岁的中国公民②人民代表大会是人民行使国家权力的机关,是由人民选举的代表组成③国家行政机关、监察机关、审判机关、检察机关都由人民代表大会产生,对它负责,受它监督④在宪法的构成中,第三章“国家机构”是宪法的核心内容A.①③B.②④C.①④D.②③4.请你阅读《宪法》目录并判断后面的说法,正确的一项是( )目录序言第一章总纲第二章公民的基本权利和义务第三章国家机构第一节全国人民代表大会第二节中华人民共和国主席第三节国务院第四节中央军事委员会第五节地方各级人民代表大会和地方各级人民政府第六节民族自治地方的自治机关第七节监察委员会第八节人民法院和人民检察院第四章国旗、国歌、国徽、首都B.我国的司法机关位于宪法的第三章第七节C.公民的政治权利来自宪法第二章,公民的政治权利就是选举权D.我国现行宪法是新中国的第四部宪法,宪法的修改必须由全国人民代表大会以全体代表一半以上的多数通过5.以下是道德与法治课上李老师呈现的一些资料及同学们对此做的解析,其中不正确的是( )①国家宪法日期间,某市举办宪法知识有奖问答,宪法宣讲团进机关、进校园,向社区居民赠送宪法读本。

2024年08版小学四年级上册第十一次英语第一单元期中试卷

2024年08版小学四年级上册第十一次英语第一单元期中试卷

2024年08版小学四年级上册英语第一单元期中试卷考试时间:80分钟(总分:110)B卷考试人:_________题号一二三总分得分一、选择题(共计20题,共40分)1、Which shape has no corners?A. SquareB. TriangleC. CircleD. Rectangle2、选择题:What do you call a person who studies rocks?A. GeologistB. BiologistC. AstronomerD. Chemist3、What sound does a cow make?A. BarkB. MeowC. MooD. Quack4、选择题:What do we call the time of the day when it gets dark?A. NightB. EveningC. Late afternoonD. Midnight5、选择题:What is the main ingredient in pancakes?A. FlourB. SugarC. MilkD. Eggs6、How many wheels does a bicycle have?A. OneB. TwoC. ThreeD. Four7、What do we call a large body of saltwater?A. LakeB. RiverC. OceanD. Pond8、选择题:What is the name of the famous lake in Africa?A. Lake VictoriaB. Lake BaikalC. Lake SuperiorD. Lake Michigan9、What is the main gas we breathe?A. OxygenB. Carbon dioxideC. NitrogenD. Hydrogen10、选择题:What do we call the area of land that is covered in sand?A. DesertB. BeachC. MountainD. Forest11、What is the name of the famous river in Egypt?A. NileB. AmazonC. MississippiD. Yangtze12、What is the currency used in the United States?A. EuroB. DollarC. PoundD. Yen13、How many inches are in a foot?A. 10B. 12C. 14D. 1614、选择题:What do we call a story that is not true?A. FactB. FictionC. HistoryD. Biography15、选择题:What do you call a book that tells you how to cook?A. Recipe BookB. NovelC. DiaryD. Encyclopedia16、选择题:What is the name of the famous castle in Germany?A. Neuschwanstein CastleB. Edinburgh CastleC. Windsor CastleD. Château de Chambord17、选择题:What do you call the main meal of the day?A. BreakfastB. LunchC. DinnerD. Snack18、What is the name of the longest river in the world?A. AmazonB. NileC. MississippiD. Yangtze19、选择题:What is the capital of Italy?A. ParisB. RomeC. MadridD. Athens20、What do you wear on your feet?A. HatB. ShirtC. ShoesD. Gloves二、听力题(共计20题,共40分)1、听力题:I see a butterfly in the ___. (garden)2、听力题:We plant trees in the ___. (spring)3、听力题:I want to _____ (join/start) a club.4、听力题:The __________ is a famous area known for its art.5、听力题:The __________ of a substance can indicate its reactivity.6、听力题:The animal that is known for its shell is a ______.7、听力题:The ________ (kingdom) is ruled by a king.8、听力题:A lever helps us lift _______ easily.9、听力题:A ____ is a small animal with a bushy tail that enjoys collecting nuts.10、听力题:The element with the atomic number is ______.11、听力题:A space shuttle is used to carry astronauts to ______.12、听力题:The sky is ___. (blue)The __________ is the imaginary line that divides the Earth into the Northern and Southern Hemispheres.14、听力题:The process of dehydration removes ______ from a substance.15、听力题:The chemical formula for bismuth chloride is _____.16、听力题:A substance that speeds up a chemical reaction is called a ______.17、听力题:They are playing ______ in the park. (football)18、听力题:I have _____ (three/four) pets.19、听力题:I like to eat ______ (apples).20、听力题:We will _______ (camp) under the stars.三、填空题(共计20题,共10分)1、填空题:I have a toy _______ that lights up and brings happiness to my day.2、填空题:The _____ (花蜜) attracts pollinators.3、填空题:My teacher often says, "_______" (名言). 这让我 _______ (形容词).4、填空题:The ancient Egyptians used _______ to keep track of time. (日历)5、填空题:My family likes to go ______ together. (我的家人喜欢一起去______。

重庆2024年08版小学第十一次英语第2单元期中试卷

重庆2024年08版小学第十一次英语第2单元期中试卷

重庆2024年08版小学英语第2单元期中试卷考试时间:100分钟(总分:120)A卷考试人:_________题号一二三四五总分得分一、综合题(共计100题)1、What type of tree produces acorns?A. PineB. OakC. MapleD. Birch答案: B2、填空题:The __________ (历史的回顾) allows for reflection.3、填空题:My sister's favorite animal is a _____.4、What is the capital of Zambia?A. LusakaB. HarareC. NairobiD. Kampala答案:A5、填空题:My favorite _____ is a bright orange kite.6、填空题:The ________ (冒险旅行) leads to new discoveries.7、填空题:My cat enjoys laying in a sunny ______ (地方).8、Which word means the same as 'fast'?A. SlowB. QuickC. HeavyD. Strong答案:B9、听力题:We are going ________ a trip.10、Which sound does a dog make?A. MeowB. MooC. BarkD. Quack答案: C11、听力题:My uncle plays soccer on the ____ (weekends).12、What is the main ingredient in a Caesar salad?A. Romaine lettuceB. SpinachC. KaleD. Arugula13、What do you call the time of year when flowers bloom?A. WinterB. SummerC. SpringD. Fall答案:C14、What is the term for a young frog?A. TadpoleB. FryC. EelD. Spawn答案:A15、听力题:The Sun will eventually become a red giant and ______.16、听力题:A process that separates a substance from a mixture is called ______.17、填空题:I have a ________ (拼图游戏) of famous buildings.The process of making hydrogen gas involves _______.19、听力题:The _______ is great for attracting bees.20、What is the name of the famous landmark located in London?A. Eiffel TowerB. Big BenC. ColosseumD. Statue of Liberty答案:B21、听力题:The _______ of a pendulum can be measured with a stopwatch.22、听力题:The _____ (library) has many books.23、选择题:Which insect makes honey?A. AntB. ButterflyC. BeeD. Fly24、选择题:What do you call the act of writing down thoughts and ideas?A. JournalingB. BloggingC. Note-takingD. All of the above25、填空题:I call my aunt _____.26、What is the capital city of Japan?A. TokyoB. BeijingC. SeoulD. Bangkok答案:A27、填空题:We often go ________ (远足) in the mountains.A ________ (森林资源) can be renewable.29、填空题:The _______ (青蛙) can live both in water and on land.30、听力题:The _____ (car/bike) is parked outside.31、Which animal is famous for its long migrations?A. ElephantB. SalmonC. LionD. Tiger答案: B32、听力题:The parrot is _______ (colorful).33、填空题:Certain plants can tolerate ______ and require less care. (某些植物可以耐旱,并且需要较少的护理。

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2009---2010学年第二学期期中考试卷B班级:08级一、语音知识(共5小题;每题1.5分,共7.5分)在下列每组单词中,有一个单词的划线部分与其他单词的划线部分的读音不同,找出这个词,并把它前面的大写字母填入答题卡。

1、A. hour B. four C. flour D. our2、A. research B. respect C. disease D. distance3、A. feather B. measure C. weather D. league4、A. cushion B. butter C. luggage D. cupboard5、A. chimney B. chicken C. chemistry D. chairman二、词汇与语法知识(共15小题;每题1.5分,共22.5分)从每小题的四个选项中,选出最佳的一项,并把它前面的大写字母填入答题卡。

6、My grandparents _________to the park to have a walk every day.A. goesB. has goneC. are goingD. go7、—Where is my mom, Dad ?—She ________ in the kitchen.A. cooksB. is cookingC. is going to cookD. was cooking8、I know him very well because we ________ friends for ages.A. areB. wereC. had beenD. have been9、—Where________ Susan and Linda?—Sorry, I don’t know. They________ here about half an hour ago.A. is; areB. are; wasC. are; wereD. were ; are10、The meeting________ at half past eight yesterday morning, but he ______at nine.A. begun: comesB. began; cameC. begins; comesD. begin; came11、When you called me this morning, I_________ the newspaper. A. read B. was reading C. reads D. have read12、When World War II_________, he _________ in France.A. started; livedB. was starting; livedC. started; was livingD. was starting; was living13、At first we were not sure whether we ___, but we tried our best to complete the Work.A. have succeededB. will succeedC. were succeededD. would succeed14、Mr. Jackson ________ himself physics by the time he was ten years old.A. taughtB. has taughtC. was taughtD. had taught15、By the end of last month she _____. Over five hundred letters of congratulation from different parts of the worldA. receivedB. has receivedC. had receivedD. would received16、Be quiet! I’m trying to hear what the man ______.A. saysB. is sayingC. saidD. has said17、He said he ______ an exhibition the next Tuesday.A. will visitB. visitedC. was visitingD. would visit18、-Don’t forget to come to my birthday party tomorrow.-No, I ______.A. won’tB. don’tC. can’tD. haven’t19、He got up early this morning, but he sometimes _______ in bed until lunch time.A. stayB. staysC. is stayingD. staying20、She is still in hospital. She _______sick since last Thursday.A. had beenB. wasC. has beenD. have been三、完型填空(共10小题;每题2分,共20分)通读下面的短文,掌握其大意。

然后,从每小题的三个选项中选出可填入相应空白处的最佳选项,并把它前面的大写字母填入答题卡。

Jane and Sally are friends.__21__ of them have got married, and love __22__ husbands very much.One day, they met __23_ and began talking _24_ their husbands. According to Jane, her husband is very big __25_ strong. He like s sports very much. He can swim and he can __26_ several ball games. __27_ football, basketball and tennis. Sally’s husband, however, does not like sports. He is physically _28_ big nor strong, but he is intelligent (聪明的).He is good at languages. He can __29_four foreign languages, including Spanish, French, Japanese and Chinese. Beside, he is much a family man. He can cook, and iron (熨烫衣服). He is really a very good _30__.21. A. All B. Both C. Either22. A. their B. them C. they23. A. one another B. each other C. the other24. A. to B. with C. about25. A. but B. and C. while26. A. play B. take C. watch27. A. as to B. as such C. such as28. A. either B. neither C. both29. A. speak B. say C. talk30. A. father B. friend C. husband四、阅读理解(共20小题;每题3分,共60分)阅读下面的短文,然后根据短文的内容从每小题的四个选项中,选出最佳的一项,并把它前面的大写字母填入答题卡。

AJohn and Kate are friends. John has got a new job in another city, which is far from where Kate works, so they do not see each other very often.Kate is working in a big company. They make a lot of computers there every year. Kate really likes her company because the manager is very nice and she has many friends there. Some of her friends are Chinese. They often help Kate whit her Chinese.John and Kate often talk with each other on the phone(电话). They talk about their work, about their friends, and about their hobbies. But they can see each other only once or twice a year. They miss each other very much.31. John is Kate’s boy friend.A. RightB. WrongC. Doesn’t Say32. John has a new job.A. RightB. WrongC. Doesn’t Say33. Kate does not enjoy working in the company.A. RightB. WrongC. Doesn’t Say34. Kate has some Chinese friends.A. RightB. WrongC. Doesn’t Say35. John and Kate are working in China.A. RightB. WrongC. Do esn’t SayBGreat changes have taken place in family life, especially in the size of a family.In the past, more Americans lived on their own farms and each family had several children. Children often lived together parents and even with their grandparents.It was not unusual that ten or more people ate at the same dining table.With the development industry(工业), family life has greatly changed. The size of a family has become smaller. Each family has fewer children than before they have to move from place to place for work. Large families cannot move so easily.In the future, families will become even smaller. Each family may have only one child. Some families may prefer to be childless and consist of(包括)only a man and a woman.36、The passage mainly talks about the changes in______A. family sizeB. family’s economyC. family living conditions37、Which of the following may be the reason why families become smaller?A. People are richer than they used to be.B. People have to move more often than beforeC. People did not feel safe living in big families38、In the passage the waiter mentioned _____ kinds of families.A. fourB. threeC. two39、According to the passage, families may become _______ in the future.A. much happierB. still richerC. even smaller40、Why people have to move from place to place?A. They like to travelB. they have to visit their relatives.C. They need to find jobs.CLast week, my uncle had a strange experience. On Saturday night, he went to a later show at the cinema. After the show was over, he had supper at a small restaurant. Then he walked home.When he arrived home, he realized that he had forgotten to take the house key with him. He had left the key inside and banged the door close when going out. How was he going to get in?Luckily, he noticed that a side window was not fully closed. By pushing his arm inside, he could turn the knob(把手)on the door and open it. Happy at this thought he pushed the window open and was about to put his hand inside.Just then, a police car was passing by. The police saw a man trying to get into the house through the window. At once, they came and caught hole of Uncle. He tried to explain(解释),but they did not believe him.At last, he asked them to come inside his house. There on the wall, he showed them his photographs. The police then believed him, but they advised Uncle not to do such a thing in future as thieves(小偷)might follow his example.41.On Saturday night, Uncle went out_____.A.to see a filmB.to take a walkC.to nave supper with a friend42.Uncle had left his house key ______A.at the cinemaB.at the restaurantC.in the house43.Uncle thought that he could enter the house by _______A.climbing through the side windowB.pushing the door openC.opening the door from inside through the side window44.The policemen came because ________.A.they wanted to help UncleB.they though Uncle was a thiefC. they wondered what Uncle was doing45. The policemen believed Uncle after ________A. Uncle explained everything clearlyB. Uncle incited them to come inside his houseC. they saw Uncle’s photographs on the wallDWhen I was fourteen. I answered a pen-friend advertisement(广告) and started to write to a boy in the USA. He was twenty-one and I knew he wouldn’t have written back if he had know my real age, so I told him I w as eighteen. I even sent him a photograph of my cousin, who is very beautiful. As time passed, his letters grew more affectionate (富于感情的).Ishouldn’t have, but I just played along. I was really horrible, My friends and I used to have a good laugh each time I received a letter from him. By the time he told me that he loved me and that I was the most exciting girl he’d ever known,I didn’t know what to do. I should have told him the truth then, but I didn’t, because I didn’twant him to feel stupid(愚蠢), so we continued writing to each other. When he told me he was coming to a English, I was panicked. I wrote and told him I was sorry but I’d just become engaged toa boy at home. He sent me a very sad letter wishing me every happiness. I felt really terrible.46. When she started to write to her pen-friend, the writer was_____A. FourteenB. eighteenC. twenty-one47. She sent him a photo of her cousin because____A.her cousin was attractiveB.she wanted to lie about her ageC.her cousin wanted to be a friend of the boy48. In the passage, the word “panicked” means _____A. to be sorryB. to be excitedC. to be greatly surprised49. When the boy told her that he loved her, she ______A. told him the truthB. didn’t stop writing to himC.decided to marry a boy at home50. The writer knew the boy thought ______A.her friendsB. her cousinC. a public notice 五、补全对话(共5小题;每题3分,共15分)根据中文提示,将对话中缺少的内容写在线上。

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