八年级下数学期中试题

2024-05-22

八年级下数学期中试题(精选6篇)

篇1:八年级下数学期中试题

关于人教版数学八年级下的期中测试题

一、填空题

1、某种感冒病毒的直径是0.00000012米,用科学记数法表示为。;;

2、若x2+2(m-3)x+16是完全平方式,则m的值等于

3、填空:x2+()+14=()2;

()(-2x+3y)=9y2—4x2

4、若一次函数y=(2-m)x+m的图象经过第一、二、四象限时,m的取值范围是________,若它的图象不经过第二象限,m的取值范围是________.

5、某市自来水公司为了鼓励市民节约用水,采取分段收费标准。某市居民每月交水费y(元)与水量x(吨)的函数关系如图所示。请你通过观察函数图象,回答自来水公司收费标准:若用水不超过5吨,水费为_________元/吨;若用水超过5吨,超过部分的水费为____________元/吨。

二、选择题

1、下列式子中,从左到右的变形是因式分解的是()

A、(x-1)(x-2)=x2-3x+2B、x2-3x+2=(x-1)(x-2)

C、x2+4x+4=x(x一4)+4D、x2+y2=(x+y)(x—y)

2、多项式(x+m)(x-3)展开后,不含有x的一次项,则m的取值为( )

A. m=0B. m=3C. m=-3D. m=2

3、点P1(x1,y1),点P2(x2,y2)是一次函数y=-4x+3图象上的两个点,且x1

A.y1>y2B.y1>y2>0C.y1

4、如果解分式方程出现了增根,那么增根可能是()

A、-2B、3C、3或-4D、-4

5、若点A(2,4)在函数的图象上,则下列各点在此函数图象上的是()。

A(0,-2)B(,0)C(8,20)D(,)

6、小敏家距学校米,某天小敏从家里出发骑自行车上学,开始她以每分钟米的速度匀速行驶了米,遇到交通堵塞,耽搁了分钟,然后以每分钟米的.速度匀速前进一直到学校,你认为小敏离家的距离与时间之间的函数图象大致是()

三、计算题

1、2(m+1)2-(2m+1)(2m-1)2、

四、因式分解

1、8a3b2+12ab3c2、a2(x-y)-4b2(x-y)

3、2x2y-8xy+8y

五、求值

课堂上,李老师出了这样一道题:已知,求代数式,小明觉得直接代入计算太繁了,请你来帮他解决,并写出具体过程。

六、解答题

1某旅游团上午8时从旅馆出发,乘汽车到距离180千米的某著名旅游景点游玩,该汽车离旅馆的距离S(千米)与时间t(时)的关系可以用图6的折线表示.根据图象提供的有关信息,解答下列问题:

⑴求该团去景点时的平均速度是多少?

⑵该团在旅游景点游玩了多少小时?

⑶求出返程途中S(千米)与时间t(时)的函数关系式,并求出自变量t的取值范围。

2、小明受《乌鸦喝水》故事的启发,利用量桶和体积相同的小球进行了如下操作:

请根据图2中给出的信息,解答下列问题:

(1)放入一个小球量桶中水面升高___________;

(2)求放入小球后量桶中水面的高度()与小球个数(个)之间的一次函数关系式(不要求写出自变量的取值范围);

(3)量桶中至少放入几个小球时有水溢出?

3、某冰箱厂为响应国家“家电下乡”号召,计划生产、两种型号的冰箱100台.经预算,两种冰箱全部售出后,可获得利润不低于4.75万元,不高于4.8万元,两种型号的冰箱生产成本和售价如下表:

型号A型B型

成本(元/台)2600

售价(元/台)28003000

(1)冰箱厂有哪几种生产方案?

(2)该冰箱厂按哪种方案生产,才能使投入成本最少?“家电下乡”后农民买家电(冰箱、彩电、洗衣机)可享受13%的政府补贴,那么在这种方案下政府需补贴给农民多少元?

(3)若按(2)中的方案生产,冰箱厂计划将获得的全部利润购买三种物品:体育器材、实验设备、办公用品支援某希望小学.其中体育器材至多买4套,体育器材每套6000元,实验设备每套3000元,办公用品每套1800元,把钱全部用尽且三种物品都购买的情况下,请你直接写出实验设备的买法共有多少种。

篇2:八年级下数学期中试题

一、精心选一选

1.下列实数中,其中无理数共

A.2个B.3个C.4个D.5个

2.下列长度的各组线段中,能组成直角三角形的是()

A.4,5,6B.6,8,10C.5,9,12D.3,9,13

3.如果等腰三角形两边长是8cm和4cm,那么它的周长是( )

A、20cmB、16cmC、20cm或16cmD、12cm

4.如图,图中显示的是从镜子中看到背后墙上的电子钟读数,由此你可以推断这时的实际

时间是()

A、10:05B、20:01C、20:10D、10:02

第4题第5题第7题

5.如图,数轴上A、B两点表示的数分别为和,点B关于点A的对称点为C,则点C所表示的数为()

A.B.C.D.

6.已知=0,求yx的值()

A、-1B、-2C、1D、2

7.如图,DE是△ABC中AC边上的垂直平分线,如果BC=9cm,AB=11cm,则△EBC的周长为()

A、9cmB、11cmC、20cmD、31cm

8、一个直角三角形三边的长a、b、c都是整数,且满足a

A、200B、210C、220D、230

二、细心填一填.(本大题共11小题,每空2分,共24分)

1、25的平方根是:绝对值是

2、等腰三角形一个角等于100,则它的底角是

3.近似数3.20×106精确到位

4、如图,∠1=∠2,要使△ABE≌△ACE,还需添加一个条件是(填上你认为适当的一个条件即可).

5、已知直角三角形的两边长分别为6和10,则第三边的.长为.

6、如图,有一张直角三角形纸片,两直角边AC=5cm,BC=10cm,将△ABC折叠,点B与点A重合,折痕为DE,则CD的长为。

7、在Rt△ABC中,∠C=90°,若AB=20,AC=16,AD平分∠BAC交BC于点D,且BD:CD=3:1,则点D到线段AB的距离为。

8、若一个正数的平方根是2a+1和-a-4,则这个正数是。

9、直角三角形斜边上的高与中线分别是5cm和7cm,则它的面积是cm2

10、8月在北京召开的国际数学大会会标取材于我国古代数学家赵爽的《勾股圆方图》,它是由四个全等的直角三角形与中间的小正方形拼成的一个大正方形(如图),如果大正方形的面积是13,小正方形的面积是1,直角三角形较短的直角边为a,较长的直角边为b,那么(a+b)2的值为。

篇3:八年级下数学期中试题

一、选择题:本大题共12小题, 每小题5分, 共60分.在每小题给出的四个选项中, 只有一项是符合题意要求的.

1.集合A={3, loga2}, B={a, b}, 若A∩B={1}, 则A∪B= () .

(A) {1, 2, 3}

(B) {1, 2, 3, 4}

(C) {1, 2, 3, 5}

(D) {1, 2, 3, 6}

2.已知z= (a-i) (1+i) (a∈R, i为虚数单位) , 若复数z在复平面内对应的点在实轴上, 则a= () .

(A) 1

(B) 2

(C) 3

()

4.一个算法的流程图如图1所示, 则输出I的结果为 () .

(A) 5

(B) 6

(C) 7

(D) 8

5.已知某个几何体的三视图如图2 (主视图的弧线是半圆) , 根据图中标出的尺寸 (单位:cm) , 可得这个几何体的体积是 () .

(A) 640+80πcm3

(B) 640+40πcm3

(C) 640+60πcm3

(D) 640+30πcm3

6.如图3, 在4×4的方格纸中, 若起点和终点均在格点的向量m, n, p满足p=xm+yn (x, y∈R) , 则4x+y的值为 () .

(A) 4

(C) 6

(D) 7

7. (理) 如图4, 点O为作简谐振动的物体的平衡位置, 取向右方向为正方向, 若已知振幅为3cm, 周期为3s, 且物体向右运动到距平衡位置最远处时开始计时, 则该物体5s时刻的位移为 () .

(A) 1.5cm

(B) -1.5cm

(C) -2cm

(D) -1cm

(文) 如图5, 摩天轮的半径为40 m, 点O距地面的高度为50m, 摩天轮逆时针做匀速转动, 每6min转一圈, 摩天轮上的点P的起始位置在最低点处, 则在2013min时, P距离地面的高度为 () .

(A) 60m

(B) 70m

(C) 80m

(D) 90m

(A) -1

(C) -3

(D) -4

(A) -1

(B) -10

(C) -3

(D) -5

10. (理) 设集合A={1, 2, 3, 4, 5, 6}, 对任意x∈A, 有f (1) <f (2) <f (3) , 则映射f:A→A的个数共有 () .

(文) 已知六个点A1 (x1, 1) , B1 (x2, -1) , A2 (x3, 1) , B2 (x4, -1) , A3 (x5, 1) , B3 (x6, -1) (x1<x2<x3<x4<x5<x6, x6-x1=5π) 都在函数f (x) =sin x的图象C上.如果两点连线的中点仍在图象C上, 则称此两点为“好点组”.则上述六点中“好点组”的个数为 (不考虑两点的顺序) () .

(A) 9

(B) 10

(C) 11

(D) 12

11.若动点P在直线l1:x-y-2=0上, 动点Q在直线l2:x-y-6=0上, 设线段PQ的中点为M (x0, y0) , 且 (x0-2) 2+ (y0+2) 2≤8, 则x20+y20的取值范围是 () .

(B) [4, 16]

(C) [6, 16]

(D) [8, 16]

二、填空题:本大题共4小题, 每小题5分, 共20分.把答案填在题中横线上.

14.用[x]表示不超过x的最大整数.已知f (x) =x+[x]的定义域为[-1, 1) , 则函数f (x) 的值域为_____________.

15.各项均为正数的等比数列{an}满足a1a7=4, a6=8, 若函数f (x) =a1x+a2x2+a3x3+…+a10x10的导数为f′ (x) , 则f′ () 的值为_____________.

16. (理) 如图6, 在棱长为1的正方体ABCD-A1B1C1D1中, 若点P是棱上一点, 则满足PA+PC1=2的点P的个数为____________.

(文) 将一个长宽分别是a, b (0<b<a) 的铁皮的四角切去相同的正方形, 然后折成一个无盖的长方体的盒子, 若这个长方体的外接球的面积存在最小值, 则的取值范围是_____________.

三、解答题:本大题共6小题, 共70分.解答应写出文字说明、证明过程或演算步骤.

17. (本小题满分12分) 销售甲、乙两种商品所得利润分别是y1, y2万元, 它们与投入资金x万元的关系分别为y1=+1+a, y2=bx, 其中m, a, b都为常数, 对应的曲线C1, C2如图7所示.

(Ⅰ) 求函数y1, y2的解析式;

(Ⅱ) 若该商场一共投资4万元经销甲、乙两种商品, 求该商场所获利润的最大值.

18. (本小题满分12分) (理) 如图8, 在长方体ABCD-A1B1C1D1中, DA=DC=1, DD=2, 点P在棱CC上.

(Ⅰ) 求异面直线AB与A1C所成角的余弦值;

(Ⅱ) 若∠A1PB=90°, 记二面角A-A1B-P的平面角为θ, 求sinθ.

(文) 如图9, 已知PA⊥菱形ABCD所在的平面, 点E, F分别为线段BC, PA的中点.

(Ⅰ) 求证:BD⊥PC;

(Ⅱ) 求证:BF∥平面PDE.

19. (本小题满分12分) 已知数列an=n-16, bn= (-1) n|n-15|, 其中n∈N*.

(Ⅰ) 求满足an+1=|bn|的所有正整数n的集合;

(Ⅲ) 记数列{anbn}的前n项和为Sn, 求所有满足S2 m=S2n (m<n) 的有序整数对 (m, n) .

(Ⅰ) 求椭圆的标准方程;

(Ⅱ) 若P为线段AB的中点, 求k1;

(Ⅲ) 若k1+k2=1, 求证:直线MN恒过定点, 并求出定点坐标.

21. (本小题满分12分) 已知函数f (x) =-x3+x2, g (x) =aln x, a∈R.

(Ⅰ) 若对任意x∈[1, e], 都有g (x) ≥-x2+ (a+2) x恒成立, 求a的取值范围;

请考生在第22、23、24三题中任选一题作答, 如果多做, 则按所做的第一题记分.

22. (本小题满分10分) 选修4-1:几何证明选讲

(Ⅰ) AB·AC=AE·AD;

(Ⅱ) ∠FAE=∠FAD.

23. (本小题满分10分) 选修4-4:坐标系与参数方程

24. (本小题满分10分) 选修4-5:不等式选讲

(Ⅰ) 当a=-5时, 求函数f (x) 的定义域;

(Ⅱ) 若函数f (x) 的定义域为R, 试求a的取值范围.

参考答案

∴b=1, ∴A∪B={1, 2, 3}.故选A.

2.A.z= (a-i) (1+i) = (1+a) + (a-1) i, 因为复数z对应点在实轴上, 所以z为实数, 即z的虚部为0, 所以a=1.故选A.

4.C.当I=5时, S=1×3×5<100;I=7时, S=1×3×5×7=105>100, 所以输出I=7.故选C.

6.D.建立如图所示的直角坐标系, 则m= (1, 3) , n= (3, -2) , p= (4, 3) , 因为p=xm+yn, 所以x+3y=4, 3x-2y=3, 两式相加即得4x+y=7.

(文) B.2013=6×335+3, 故第2013 min时, P所在位置与第3min时点P所在位置相同, 即从起点转过圈, 其高度为90 m.故选B.

注:也可以先求出点P的高度关于t的表达式, 再进行求解.

椭圆与双曲线有相同的焦点, 设左、右焦点分别为F1, F2,

则由椭圆的定义知,

|PF1|+|PF2|=10. (1)

由双曲线的定义知,

另解:注意到题中的△ABC形状不确定, 因此可取特殊情形∠ACB=90°, 则点H即为点A, 由此可迅速得到答案.

10. (理) C.因为f (1) <f (2) <f (3) , 即1, 2, 3的象固定顺序, 所以先从集合A的6个元素中任取3个元素作为1, 2, 3的象, 有C36种方法, 剩下3个元素的4, 5, 6的象无限制条件, 各有6种象的选择方法, 由乘法原理知, 共有C3663个不同的映射.故选C.

11.D.设点P (x1, y1) 满足x1-y1-2=0, 点Q (x2, y2) 满足x2-y2-6=0, 两式相加得点M (x0, y0) 轨迹是直线l:x0-y0-4=0, 同时点M (x0, y0) 满足 (x0-2) 2+ (y0+2) 2≤8, 所以满足条件的点M在线段AB上, 其中A (0, -4) , B (4, 0) 分别为直线l:x-y-4=0与圆C: (x0-2) 2+ (y0+2) 2=8的交点.x20+y20表示线段AB上的点到原点距离的平方, 所以当点M运动到A (0, -4) 或B (4, 0) 时, x20+y20取得最大值为16, 当点M运动到圆心C (2, -2) 时, 故x20+y20取得最小值为8.x20+y20的取值范围是[8, 16].故选D.

另解:在得到M (x0, y0) 轨迹是直线x0-y0-4=0后, 亦可以用x0=y0+4代入条件 (x0-2) 2+ (y0+2) 2≤8得到y0∈[-4, 0], 代入目标x20+y20消元得x20+y20=2y20+8y0+16利用二次函数求得x20+y20的取值范围是[8, 16].

12.C.设x+2=s, y+1=t, 则s+t=4.

注:利用分母的整体换元, 化繁为简.

14.[-2, -1) ∪[0, 1) .根据[x]的定义分类讨论:当x∈[-1, 0) 时, y=x-1, -2≤y<-1;当x∈[0, 1) 时, y=x, 0≤y<1.所以函数f (x) 的值域为[-2, -1) ∪[0, 1) .

16. (理) 6.方法1:一方面点P在以A, C1为焦点, 长轴长为2的椭圆上;另一方面, P可能在AB, AD, AA1, C1B1, C1D1, C1C上, 或者在BB1, DD1, CD, A1B1, BC, A1D1上.

故BB1上不存在满足条件的点P.

同理DD1, CD, A1B1, BC, A1D1上不存在满足条件的点P.

故满足题设条件的点P的个数为6.

方法2:若P在AB上, 设AP=x, 有

故AB上有一点P (AB的中点) 满足条件.

同理在AD, AA1, C1B1, C1D1, C1C上各有一点满足条件.

故BB1上不存在满足条件的点P.

同理DD1, CD, A1B1, BC, A1D1上不存在满足条件的点P.

故满足题设条件的点P的个数为6. (充分利用椭圆的定义)

(Ⅱ) 设销售甲商品投入资金x万元, 则乙投入 (4-x) 万元.

当t=2时, 即x=3时, 取最大值1.

答:该商场所获利润的最大值为1万元.

18. (理) 解:以点D为原点O, DA, DC, DD1分别为x, y, z轴建立如下图所示的空间直角坐标系O-xyz, 则D (0, 0, 0) , A (1, 0, 0) , B (1, 1, 0) , C (0, 1, 0) , A1 (1, 0, 2) .

设P (0, 1, λ) , 其中λ∈[0, 2].

即 (-1, 1, λ-2) · (-1, 0, λ) =0, 得λ=1,

此时P (0, 1, 1) , 即有PC=1.

设平面A1BP的法向量为n= (x, y, z) ,

不妨取x=1, 则y=2, z=1, 即n= (1, 2, 1) .

(文) 证明: (Ⅰ) ∵PA⊥平面ABCD, BD平面ABCD,

∴PA⊥BD.

又∵ABCD是菱形, ∴AC⊥BD.

又PA, AC平面PAC, PA∩AC=A,

∴BD⊥平面PAC.

又PC平面PAC, ∴BD⊥PC.

(Ⅱ) 取线段PD的中点G, 连结EG, FG,

∴FGBE, FG=BE,

∴四边形BEGF是平行四边形,

∴BF∥EG.

∴BF∥平面PDE.

19.解: (Ⅰ) an+1=|bn|, n-15=|n-15|,

当n≥15时, an+1=|bn|恒成立,

当n<15时, n-15=- (n-15) , n=15.

∴n的集合{n|n≥15, n∈N*}.

(ⅰ) 当n>16时, 当n取偶数时,

(Ⅲ) 当n≤15时, bn= (-1) n-1 (n-15) , a2k-1b2k-1+a2kb2k=2 (16-2k) ≥0, 当n>15时, bn= (-1) n (n-15) , a2k-1b2k-1+a2kb2k=2 (2k-16) >0, 其中a15b15+a16b16=0,

∴S16=S14, m=7, n=8.

20.解: (Ⅰ) 依题设c=1, 且右焦点F′ (1, 0) .

所以, 2a=EF+EF′

b2=a2-c2=2,

(Ⅱ) 设A (x1, y1) , B (x2, y2) ,

(Ⅲ) 依题设, k1≠k2.

设M (xM, yM) , 直线AB的方程为y-1=k1 (x-1) , 即y=k1x+ (1-k1) , 亦即y=k1x+k2,

代入椭圆方程并化简得

(2+3k21) x2+6k1k2x+3k22-6=0.

当k1k2=0时, 直线MN即为y轴, 此时亦过点 (0, -) .

解: (Ⅰ) 由g (x) ≥-x2+ (a+2) x, 得 (x-ln x) a≤x2-2x.由于x∈[1, e], ln x≤1≤x, 且等号不能同时取得,

所以ln x<x, x-ln x>0.

x∈[1, e], x-1≥0, ln x≤1, x+2-2ln x>0,

从而t′ (x) ≥0, t (x) 在[1, e]上为增函数.

所以t (x) min=t (1) =-1, 所以a≤-1.

设P (t, F (t) ) 为曲线y=F (x) 上的任意一点.

(1) 若t≤-1, P (t, -t3+t2) ,

=-t2+aln (-t) · (-t3+t2) .

当t=-1时, a (1-t) ln (-t) <1恒成立.

(2) 若-1<t<1, t≠0, P (t, -t3+t2) ,

Q (-t, t3+t2) ,

t4-t2+1>0对-1<t<1, t≠0恒成立.

(3) 当t≥1时, 同 (1) 可得a≤0.

综上所述, a的取值范围是 (-∞, 0].

22.证明: (Ⅰ) 连结BE, 则∠E=∠C,

又∠ABE=∠ADC=90°,

∴AB·AC=AE·AD.

24.解: (Ⅰ) 由题设知, |x+1|+|x-2|-5≥0,

如上图, 在同一坐标系中作出函数y=|x+1|+|x-2|和y=5的图象,

∴定义域为 (-∞, -2]∪[3, +∞) .

(Ⅱ) 由题设知, 当x∈R时, 恒有|x+1|+|x-2|+a≥0,

即|x+1|+|x-2|≥-a, 由 (Ⅰ) 知, |x+1|+|x-2|≥3, ∴-a≤3, ∴a≥-3.

篇4:(新目标)八年级上期中测试题

A)根据句意及汉语提示,填写句中所缺的单词

1. Some friends have opposite views and ____ (兴趣).

2. Beijing is in the ____ (北部的) part of China.

3. I can’t find the last page of the ____ (日历).

4. Mr and Mrs Wang go shopping by ____ (地铁) every day.

5. They stay here the ____(整个的) afternoon.

B)用括号内所给动词的适当形式填空

1. My uncle often ____ (walk) to the library.

2. It’s six o’clock. The students ____ (play) football on the playground.

3. ____ your mother ____ (cook) Chinese food last Friday?

4. ____ (not read) the books now.

5. Can you ____ (help) me with my Chinese?

6. ——What day ____ (be) it yesterday?

——It ____ (be) Friday.

7. Look at the clouds. It ____ (rain).

8. Thanks for ____ (ask) me to your party.

9. Lily has to ____ (eat) lunch at home.

10. Tom ____ (visit) his friends yesterday evening.

Ⅱ.单项选择

1. ——____

——By taxi.

A. Why does he go to work?B. How does he go to work?

C. When does he go to work?D. Where does he work?

2. Kelly has ____ breakfast. Then she leaves home.

A. quickB. a quickC. one quickD. an quick

3. ——Is your home ____ the post office?

——No, it’s ____ the post office.

A. far to; near fromB. far from; near from

C. far from; nearD. far to; near to

4. ——____ is it from your school to the bank?

——It’s about six miles.

A. How muchB. How manyC. How longD. How far

5. I like to ____ my bike ____ the weekend.

A. take; inB. catch; atC. live; onD. ride; on

6. ——Can you come to my party?

——____.

A. Sure, I’d love toB. I’m sorry to hear that

C. You’re rightD. That’s all right

7. ——Let’s ask Jack to play ____ piano for the party.

——That’s a good idea.

A. /B. aC. anD. the

8. ——They have ____ homework to do on Sundays.

——That’s too bad.

A. too muchB. too manyC. much tooD. many too

9. ——Happy birthday to you.

——____.

A. The same to youB. Thank you

C. Happy birthday to you, tooD. That’s great

10. ____ he was tired, ____ he went on working.

A. Though; butB. Because; soC. Though; /D. Because; /

11. You don’t look well. What’s the matter ____ you?

A. withB. onC. inD. about

12. We enjoy ____ TV at home.

A. watchB. watchingC. to watchD. seeing

13. ____, we’re quite different from each other.

A. On a handB. In one hand

C. On the other handD. On other hand

14. I think you ____ lie in bed and have a good rest.

A. mustB. canC. needD. should

15. It is not good ____ your health.

A. forB. atC. withD. to

16. She is telling them ____ and they are all laughing.

A. interesting somethingB. something interesting

C. anything interestedD. interested anything

17. What are you doing ____ vacation?

A. inB. withC. forD. at

18. All of them like to go ____.

A. campB. to campC. campsD. camping

19. ____ is it like in Nanjing?

A. WhatB. HowC. SoD. When

20. ____ is the weather in Haikou?

A. WhatB. HowC. WhenD. Where

21. We are staying there ____ about two weeks.

A. forB. inC. beforeD. after

22. I’m sorry ____ late.

A. toB. to beC. forD. because of

23. Make a new conversation ____ all the information below.

A. useB. to useC. usingD. used

24. WTO stands ____ World Trade Organization.

A. atB. asC. forD. like

25. It must be ____ fun than watching TV at home.

A. lotB. a lotC. lot moreD. a lot more

26. They go to school ____ the school bus.

A. withB. byC. inD. on

27. She is different from her sister ____ some ways.

A. inB. onC. aboutD. from

28. Her home is quite far ____ the school.

A. toB. fromC. awayD. off

29. The light turns red. They stop ____.

A. walkB. to walkC. walkedD. walking

30. They have a son ___ Nicolas.

A. callB. callsC. calledD. calling

Ⅲ.句型转换按要求改写下列各句,每空一词

1. The bus ride usually takes about 25 minutes.(改为一般疑问句)

____ the bus ride usually ____ about 25 minutes?

2. Mary has to see the doctor.(对划线部分提问)

____ does Mary ____ to ____?

3. They can make cakes.(改为一般疑问句)

____ they ____ cakes?

4. Li Lei is ten years old. Lin Tao is twelve years old.(合并为一句)

Li Lei is ____ ____ Lin Tao.

5. Our bikes are not the same as theirs.(改为同义句)

Our bikes are ____ ____ theirs.

Ⅳ.根据汉语意思把下列各句译成英语

1. 我们每天花三个小时看电视。

____ ____ us three hours ____ watch TV every day.

2. 他妹妹擅长数学。

His sister is ____ ____ math.

3. 王林今天没来上学,我想他一定在家。

Wang Lin doesn’t come to school today. I think he ____ ____ at

home.

4. 晚饭后为什么不去散步呢?

____ ____ ____ for a walk after supper?

5. 星期天我不得不为我的英语考试而学习。

I ____ ____ study ____ my English exam on Sunday.

Ⅴ.补全对话从下列方框中选择恰当的句子,完成下列对话

A: __1__

B: Yes, please. Could you tell me the way to the First People’s Hospital?

A: Let me see. Oh, it’s far from here.

B: __2__

A: About five miles. __3__

B: Which bus should I take?

A: No. 1 bus can take you there.

B: __4__

A: It’s about 30 minutes.

B: Thank you very much.

A: __5__

A. You’re welcome.

B. Can I help you?

C. You can take a bus to go there.

D. How long does it take to get there?

E. How far is it from here?

Ⅵ.完形填空

Mr White works in a middle school. He __1__ English. He is friendly to his __2__ and they also like him. He spends __3__ time on his work. He often does some reading and writing. When he’s __4__, he is also very busy, so he can’t help his wife to do any __5__. The woman is always angry with him.

It’s Saturday. Their daughter Kate is __6__ her homework in her bedroom. Mrs White finds her __7__ is out. She hopes her daughter will say she’s __8__ than her husband. She gives an apple to Kate and asks, “__9__ is cleverer, your father or I?”

Can you guess what the girl’s __10__ is?

“I’m the cleverest in our family!”Kate says without thinking.

1. A. teachesB. watchesC. studiesD. reads

2. A. friendsB. studentsC. worksD. drivers

3. A. manyB. littleC. muchD. any

4. A. at workB. in bed

C. in the classroomD. at home

5. A. houseworkB. homeworkC. schoolworkD. lessons

6. A. makingB. doingC. lookingD. finding

7. A. motherB. brotherC. husbandD. teacher

8. A. goodB. bestC. better D. bad

9. A. WhoseB. WhatC. WhyD. Who

10. A. answerB. playC. singD. think

Ⅶ.阅读理解

(A)

We cannot live a modern life without traveling. The fastest way of traveling is by air. With a plane one can travel in one day to places which it took a month or more to get to a hundred years ago.

Traveling by train is slower than by plane, but one can see the country he is traveling through. Modern trains have comfortable seats and dinning-cars. They make even the longest journey enjoyable.

Some people prefer to travel by sea when possible. There are large luxury liners(客轮) or river boats. They are not as fast as trains or planes, but traveling by sea is a very pleasant way to spend a holiday.

Many people like to travel by car. They can make their own timetable. They can travel hundreds of miles or only fifty miles a day, just as their wish. They can stop wherever they want to see something interesting or to enjoy a good meal at a good restaurant, or to spend the night at a hotel. That is why people choose traveling by car for pleasant trips, while they usually take trains or planes for business.

根据短文内容,选择最佳答案

1. People cannot live a modern life without ____.

A. travelingB. holidaysC. shoppingD. sports

2. According to the passage, the fastest way of traveling is ____.

A. by shipB. by planeC. by trainD. on foot

3. Modern trains have comfortable seats and ____.

A. parksB. gardensC. dinning-carsD. cars

4. If we travel by car, we can ____.

A. enjoy the longest journey

B. travel only fifty miles a day

C. make our own timetable

D. travel to a very far place in a few minutes

5. When people travel on business, they usually take ____.

A. a boat or a trainB. a car or a boat

C. a plane or a carD. a train or a plane

(B)

Basketball players are usually very tall because they need to put the ball into the basket. But other sports players are sometimes short. Some of the best football stars are not VERY TALL.

Short people often have better balance(平衡) than tall people, so they don’t fall over very often. In some sports the players must have good balance, for example, table tennis and running. You don’t need long legs to run fast! Some of the fast runners in the world are not very tall. Some people are tall and some are short. The tallest person in the world is 2.31 meters tall. She is an American. And the shortest person in the world is only 57 centimeters tall. Today young people in many countries grow taller than their parents. This is because they eat better food today. Good food can help children grow.

根据短文内容,回答下列问题

6. Are all sports players tall?

7. Is it better to be short than to be tall?

8. Do fast runners all have long legs?

9. How tall is the tallest person in the world?

10. Why do young people grow taller than their parents?

Ⅷ.综合填空

根据短文内容,在短文的空白处填写一个正确的单词(首字母已给出)

Most people can have t__1__ birthday every year. But Mr Smith c__2__. He is now thirty-three years old and he’s o__3__ had eight birthdays. Last year, he had his eighth birthday. His wife b__4__ him a big birthday cake and a beautiful watch. His five-year-old d__5__ picked a lot of flowers for him in their garden. Some other people came to his birthday party, t__6__. They lit (点着) the birthday candles and sang the birthday s__7__ for him. Then it was time for Mr Smith to say h__8__ wishes. Before he could s__9__, his little daughter said, “Poor Dad, he wishes for a birthday e__10__ year.”

Ⅸ.书面表达

每个人都有自己的爱好,有的人喜欢学习、有的人喜欢运动、有的人喜欢音乐。那么你喜欢什么呢?假如你叫张红,请你以“My Interests”为题写一篇短文。词数在80词左右。

篇5:八年级数学上册期中测试题

一、填空题。(每小题3分,共30分)

1、64的平方根是 ,6.25的算术平方根是 ,-3的立方根是 。

2、 = , = ,= 。

3、= , = , = 。

4、已知(x-1)2=81 ,则x = 。若-2x+ ≥0,则x 。

5、下列各数:- , 0.1 , 1.414 , , π , , 中无理数是 。

6、比较大小: 0.6(用“>”、“<”或“=”填空) 。

7、函数y =3是常量函数,它是一条经过y轴上的( )且与 轴平行的直线。

8、圆的面积计算公式S=πR2中 是常量, 是变量。

9、我们把无限不循环小数叫 ,有理数和无理数统称,实数和的点一一对应。

10、一次函数y=0.5x+3与x轴的交点坐标是 ,与y轴的交点坐标是 ,x= 时,和y的值相等。

二、选择题。(每小题3分,共30分)

11、化简 =( )。

A、11 B、 C、 11 D、 3

12、数0.030270 中有效数字有( )个。

A、7 B、6 C、5 D、4

13、点P(2,y)与P′(3-x,5)关于y轴成轴反射,则x、y的值分别为( )。

A、1,5 B、1,- 5 C、 5,5 D、5,-5

14、一次函数y=-x+3上有两点A(x1,y1), B(x2, y2),若y1

A、x1 >x2 B、x1 =x2 C、 x1

15、函数y=(m+2)m-3是正比例函数,则m=( )。

A、 ±2 B、-2 C、 2 D、4

16、 的`算术平方根是( )。

A、9 B、-9 C、 3 D、±3

17、已知一次函数的图象经过点A(-1,4),B(2,-5),则这个函数的解析式为( )。

A、y=-5x+3 B、y=3x+1 C、y=-3x-1 D、y=-3x+1

18、若直线y=k1 x+b1 ,与直线y=k2 x+b2 在同一坐标系里相互垂直,则必须满足( )。

A、k1 k2 =1 B、k1≠0, k2 ≠0 C 、k1 k2 =-1 D、b1≠0,b2≠0

19、将△ABC向左平移3个单位得到△ ,已知A点的坐标是(-3,7),则A′的坐标是( )。

A、(-6, 4) B、(0, 10) C、( - 6, 7) D、(0, 7)

20、某天早晨,小强从家出发,以V1的速度前往学校。途中在一饮食店吃早点,之后以V2的速度向学校前进,已知v1>v2,下面的图象中表示小强从家到学校的路程s(千米)与时间t(分钟)之间的关系的是( )。

A B C D

三、解答题。(8+6+6+10+10=40)

21、计算。(要有过度步骤,第⑵题得数保留三位有效数字)

⑴ ⑵

22、已知点A(1,m)在函数y=2x的图象上,求点A关于x轴成轴反射的点 的坐标。

23、我县出租车的收费规定为:当行驶路程不超过2千米,车费都为3元,超过2千米,超过部分每千米收费1.5元。

⑴、写出车费(元)与行驶路程(千米)之间的函数关系式。

⑵当行驶路程为5千米时,车费是多少?

⑶画出这个函数的图象。

24、用图象法求二元一次方程组的近似解。(变形在右边,附上点的坐标,图画在上面)

25、小明到超市购买钢笔,每支价为5元。如果一次购买10支以上(含10支),则可以打8.5折。

⑴用公式法表示购买钢笔费用y(元)与钢笔支数x(支)之间的函数关系;

⑵若要你购买9支钢笔,请想出最好的办法;

⑶画出这个函数的图象。

四、附加题。(6+7+7)

26、已知一次函数y=(2a-4)x+6a-18,求下列情况中实数a的取值范围。

⑴y随x增大而增大。

⑵使其图象与y轴交于(0,6)。

27、直线ι与直线y=2x+1的交点的横坐标为2,与直线y=-x+2的交点的纵坐标为1,求直线ι的解析式。

篇6:2014年八年级数学期中测试题

数学

一、选择题:

1.若x-3在实数范围内有意义,则x的取值范围是()

A.x≥3B.x≤3C.x>3D.x<3

2.下列式子中属于二次根式的是()

A.9B.7C.20D.三分之一

3.计算√8×√(√0)2的结果为

A.2+√2B.√2+1C.3D.5

4.一直角三角形的两边长是3和4,则第三边长是

A.5B.√5C.√7D.5或√7

5.ABCD

ABCD

ABCD

ABCD

二、填空题:

1.计算(√2)=

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