数学期末检测题

2024-09-02

数学期末检测题(通用7篇)

数学期末检测题 篇1

一、填空题:

1.49的平方根是______, undefined的立方根是______。

2.三条边长分别是13、12、5的三角形的面积等于______。

3.如图1, 三个圆是同心圆, 圆中的阴影部分的面积是______。

4.菱形的边长为5cm, 一条对角线长为6cm, 则它的另一条对角线是______。

5.在平而直角坐标系中, 点 P (3, 2) 关于原点对称的点P′的坐标是______。

6.直线 y=kx+b平行于直线 y=2x-1, 且经过点

(0, 4) , 则 k=______, b=______。

7.一次体检中, 20名学生的身高如下表所示:

则这20名学生的身高的平均数是______, 中位数为______, 众数是______。

9.如图2, 正方形ABCD的边长为2, ME⊥AC于E, MF⊥BD于F, 则ME+MF=______。

10.一个多边形除去一个内角后, 其余的内角和是2570°, 则除去的那个角的度数是______。

二、选择题

1.如图3中, 字母A所表示的正方形面积是 ( ) 。

A.25; B.110; C.50; D.55.

2.下列说法正确的是 ( ) 。

A.0.9的算术平方根是0.3;

B.-a2一定没有算术平方根;

undefined的平方根是±2;

undefined表示3的算术平方根的相反数。

3.下列图形中既是中心对称图形又是轴对称图形的有 ( ) 。

A.1个; B.2个; C.3个; D.4个。

4.刘大伯出去散步, 从家走了20分钟, 到一个离家900米的阅报亭, 看了10分钟的报纸后, 用了15分钟返回到家。下面图中, 哪个图形表示刘大伯离家的时间与距离的关系 ( ) 。

5.在下列二元一次方程组中, 解不是的是 ( ) 。

6.正方形有而矩形不一定有的性质是 ( ) 。

A.四个角都是直角; B.对角线相等;

C.对角线互相平分; D.对角线互相垂直。

三、计算化简下列各题

undefined

undefined

四、解下列方程组

五、解答题

1.某单位需要用车, 准备和一个体车主或一国有出租车公司其中的一家签订合同, 设汽车每月行驶 x km, 应付给个体车主的月租费是 y1元, 应付给国有出租车公司的月租费y2元。 y1、y2分别与x之间的函数关系图像如图所示的两条直线, 观察图像回答下列问题。

(1) 每月行驶的路程在什么范围内时, 租国有出租车公司的出租车合算?

(2) 每月行驶的路程等于多少时, 租两家车的费用相同?

(3) 如果这个单位估计每月行驶的路程为2300 km, 那么这个单位租哪家的车合算?

2.欢欢上个月在小卖店买4本练习本和6袋笔芯, 正好用去10元钱, 昨天, 她又带10元钱去该店买同样的练习本和笔芯, 因为练习本比上个月涨价1角, 笔芯每袋涨价1角, 欢欢只好买4本练习本和5袋笔芯, 结果找回3角钱, 试问上个月每本练习本多少元?每袋笔芯多少元?

3.如图在四边形ABCD中, AC=BD, DE⊥AC于E, BF⊥AC于F, 且AF=CE, 问:

①四边形ABCD是平行四边形吗?为什么?

②求证:四边形DEBF是平行四边形。

4.如图, 点E是正方形ABCD的边BC的延长线上的点, 且CE=CA.

①求∠ACE, ∠CAE的度数;

②若 CD=5cm, 求出△ACE的面积。

参考答案:

一、undefined;2.30;undefinedπ;4.8;5.p1 (-3, -2) ;6.k=2, b=4;7. (4, -3) ;8.165.5, 165, 168;undefined;10.130°。

二、1.D;2.D;3.B;4.D;5.C;6.D.

三、undefined;undefined

四、

五、1. (1) 0≤x<1500千米; (2) 1500千米; (3) 个体车主;

2.练习本每本0.7元, 铅笔芯每袋1.2元。

3.略。4.①135°, 22.5°;undefined

数学期末检测题 篇2

1、一个南瓜重2

2、一个梨子重150()

3、一个篮球重250()

4、一只鲸重50()

5、蜡笔长6()

6、跳绳长2()

7、课桌高7()

8、粉笔长75()

二、填空。

1、一袋面粉重50千克,这样的()袋面粉重1吨。

2、操场跑道一圈是200米,要跑1千米需跑()圈。

3、园林工人要在一条路旁植树,每5米划分一段,1千米的路要划分()段。

4、小明走100米要用3分钟,他走1千米要用()分钟。

八年级数学期末复习检测题 篇3

1.若关于x的方程-=0有增根,则m的值是()。

A.-2B.2C.5D.3

2.若+=,则+=的值为()。

A.1B.-1C.0D.2

3.下列命题正确的是()。

① 对角线互相垂直且相等的平行四边形是正方形

② 平行四边形、矩形、等边三角形、正方形既是中心对称图形,也是轴对称图形

③ 旋转和平移都不改变图形的形状和大小

④ 底角45°的等腰梯形,高是h,则腰长是h

A.全对B.①②④C.①②③D.①③④

4.小明家刚买了一套新房,准备用地板砖密铺新居厨房的地面,若只用一种正多边形的地砖密铺,则下列正多边形中不适用的是()。

A.正三角形B.正方形C.正五边形D.正六边形

5.正比例函数y=x与反比例函数y=的图像相交于A、C两点。AB⊥x轴于B,CD⊥y轴于D,则四边形ABDC的面积为()。

A.1B.C.2D.

6.若点(-2,y1)、(1,y2)、(3,y3)都在反比例函数y=-的图像上,则y1,y2,y3的大小关系是()。

A.y1

7.已知一直角三角形的木板,三边的平方和为1800cm2,则斜边长为()。

A.80cmB.30cmC.90cmD.120cm

8. 五根小木棒,其长度分别为7,15,20,24,25,现将它们摆成两个直角三角形(如图1),其中正确的是()。

9. 某市为处理污水需要铺设一条长为4 000米的管道,为了尽量减少施工对交通所造成的影响,实际施工时每天比原计划多铺设10米,结果提前20天完成任务。设原计划每天铺设管道x米,则可得方程()。

A.-=20B.-=20

C.+=20D.-=20

10.某品牌皮鞋店销售不同尺码的同种品牌男鞋,采购员再次进货时,对于男鞋的尺码,他最关注下列统计资料中的()。

A.众数B.中位数C.加权平均数D.平均数

二、填空题

11.把命题“平行四边形的两条对角线互相平分”改写成“如果…,那么…”的形式是______________________。

12.若分式无意义,则x的值为____________。

13.已知=+(所有字母均不为零),则R=________。

14.将n个边长都为1cm的正方形按如图2所示的方法摆放,点A1、A2…An分别是各正方形的中心,则n个这样的正方形重叠部分(阴影部分)的面积的和为____________cm2。

15.如图3是某广告公司为某种商品设计的商标图案,若图中每个小正方形的面积都是1,则阴影部分的面积是______。

16.如图4,在平面直角坐标系中,网格中每一个小正方形的边长为1个单位长度,

(1)如在所给的网格内画出以线段AB、BC为边的菱形ABCD,则点D的坐标是_________。

(2)线段BC的长为_______,菱形ABCD的面积等于__________。

三、解答题

17.某校八年级学生开展踢毽子比赛活动,每班派5名学生参加。按团体总分多少排列名次,在规定时间内每人踢100个以上(含100个)为优秀,下表是成绩最好的甲班和乙班5名学生的比赛数据(单位:个)。经统计发现两班总分相等,此时有学生建议,可以将数据中的其他信息作为参考。

请你回答下列问题:

(1)根据上表提供的数据填写下表:

2)根据以上信息,你认为应该把冠军奖状发给哪一个班?简述理由。

18.已知:(1)=, (2)+=,

(3)++=,

……

(1)请按以上规律写出第4个等式;

(2)请按以上规律写出第n个等式,并说明理由。

19.甲、乙两地相距300km,一辆货车与一辆轿车都从甲地开往乙地,货车比轿车早出发5小时,轿车比货车晚到30分钟,已知轿车与货车的速度比为5∶2。

(1)求两车的速度。

(2)由于石油资源紧缺,97#汽油价由原来的3.15元/升涨到现在3.40元/升,若该辆货车行驶100公里耗油10升,每天在甲、乙之间往返一次,则该辆货车现在一个月(30天)用油款比原来多多少元?

20.如图5,若反比例函数y=与一次函数y=mx-4的图像都经过点A(a,2)。

(1)求点A的坐标;

(2)求一次函数y=mx-4的解析式;

(3)设O为坐标原点,若两个函数图像的另一个交点为B,求△AOB的面积。

21. 如图6所示,在直角梯形ABCD中,AD//BC,∠A=90°,AB=12,BC=21,AD=16。动点P从点B出发,沿射线BC的方向以每秒2个单位长的速度运动,动点Q同时从点A出发,在线段AD上以每秒1个单位长的速度向点D运动,当其中一个动点到达端点时另一个动点也随之停止运动。设运动的时间为t(秒)。

(1)设△DPQ的面积为S,求S与t之间的函数关系式;

(2)当t为何值时,四边形PCDQ是平行四边形。

数学期末检测 篇4

1.某班举行知识竞赛, 若答对一题加10分, 记作+10分, 那么答错一题扣10分应记作______。

2.某地气象统计资料表明:高度每增加1000米, 气温就降低6℃, 如果现在地面气温为m℃, 那么1万米高空温度是______℃。

3.当undefined时, 代数式undefined的值为______.

4.观察一列数, undefined第九个数为______.

5.地球上的陆地面积约为149000000千米2, 用科学记数法表示这个数可记为______千米2。

6.一个正方体的六个面上分别写有文字“我学习我快乐”, 如图1是此正方体的两种不同观察结果, 则“习”面相对的面上的字是______。

7.如图2, 若∠AOD=120°, ∠BOC=70°, OE、OF分别平分∠AOB和∠COD, 则 ∠EOF=______.

8.如图3, 字母a、b、c、d所表示的数在数轴上的对应点位置如图所示, 则|a|-b-c-d______0

9.你知道足球的表面是什么样的多边形皮块围成的吗?足球的表面是由若干黑色正五边形和白色正六边形皮块围成的, 黑、白皮块的数目比为3∶5, 若一个足球的表面一共有32块皮块, 那么黑、白皮块各有______块。

10.一个数字用1和0组成2007位的数码, 其排列规律是10110111010110111010110……, 则这个数码中数字“0”共有______个。

二、选择题

11.学校阶梯教室第一排前有 m个座位, 后面一排每排比前一排多2个座位, 则第 n排的座位数为 ( ) 。

A. (m+2n) 个; B. (mn+2) 个;

C.[m+2 (n-1) ]个; D.[m+ (n+2) ]个。

12.袋中装有9个红球1个白球, 随意从袋中摸球, 下列说法中错误的个数是 ( ) 。

(1) 很可能摸到红球; (2) 不太可能摸到白球; (3) 不可能摸到白球; (4) 有可能摸到红球, 也可能摸到白球。

A.1个; B.2个; C.3个; D.4个。

13.如图4是一个正方体纸盒的展开图, 若在其中的三个正方形A、B、C内分别填入适当的数, 使得折成正方体后相对的面上的两个数的和为0, 则填入正方形 A、B、C内的三个数依次为 ( ) 。

A.4, -3, 0; B.-3, 4, 0; C.0, -3, 4; D.0, 4, -3.

14.m、n为有理数, 下列判断: (1) m2+n2总是正数。 (2) (m+1) 2+n2总是正数; (3) (m-n) 2+4的最小值为4; (4) 4- (mn+4) 2的最大值是0.其中正确的个数有 ( ) 。

A.1个; B.2个;

C.3个; D.4个。

15.如图5是某校七年级 (5) 班48名同学参加课外兴趣活动的扇形统计图, 其中S1, S2, S3, S4分别为四个扇形的面积, 若S1∶S2∶S3∶S4=4∶3∶4∶1, 那么参加篮球活动小组的同学有 ( ) 名。

A.20; B.16; C.12; D.6.

三、解答题

16.计算:

(1) 25-16+ (-5) -22;

17.先化简, 再求值:

2 (a2b+ab2) -2 (a2b-1) -2ab2-2, 其中 a=-2, b=2.

18.解方程:

(1) 3x-4 (2-x) =2;

19.如图6是一些小立方块所搭几何体的俯视图, 小正方形中的数字表示该位置的小立方块的个数, 请画出这个几何体的主视图和左视图。

20.小丽在作业时, 不慎将墨水瓶打翻, 使一道作业题只看到如下字样:“A、B两地相距60千米, 甲步行速度为5千米/时, 乙骑自行车的速度为15千米/时”请你按自己的理解将此题补充完整, 并解答。

21.一筐梨, 分散后用小箱装, 用去8个箱子还剩8kg未装下;用9个箱子, 则最后一个箱子还可以装4kg, 求这筐梨的质量。

22.观察下列图中各正方形图案, 每条边上有几个圆点 (n≥0) , 每个图案中圆点总数是 S.

(1) 填写下表:

(2) 按此规律写出 S与 n的关系。

(3) 如果某一图形中共有108个圆点, 你知道它的每条边上有几个圆点吗?

参考答案

一、1.-10分;2.m-60;3.-2;undefined;5.1.49×108;6.“乐”;7.95°;8.>;9.12块和20块;10.669.

二、11.C;12.A;13.D;14.A;15.B.

三、16. (1) -18, (2) -13,

18. (1) xundefinedx=22;19.

20.略;21.设每小箱装 x kg, 8x+8=9x-4, x=12, 8x+8=104, 这筐梨的质量为104kg.

22. (1)

七年级数学期末模拟检测题 篇5

一、选择题(每小题4分,共12分)

1.某商品降价20%后出售,一段时间后欲恢复原价,则应在售价的基础上提高的百分数是( )

A.20%B.30%C.35%D.25%

2.某商店将一件商品的进价提价20%后,又降价20%以96元出售,则该商店卖出这件商品的盈亏情况是( )

A.不亏不赚B.亏4元C.赚6元D.亏24元

3.某厂投入00元购置生产某新型工艺品的专用设备和模具,共生产这种工艺品x件,又知生产每件工艺品还需投入350元,每件工艺品以销售价550元全部售出,生产这x件工艺品的销售利润=销售总收入-总投入,则下列说法错误的是( )

A.若产量x<1000,则销售利润为负值

B.若产量x=1000,则销售利润为零

C.若产量x=1000,则销售利润为200000元

D.若产量x>1000,则销售利润随着产量x的增大而增加

二、填空题(每小题4分,共12分)

4.某地居民生活用电基本价格为0.50元/度.规定每月基本用电量为a度,超过部分的电量每度电价比基本用电量的岸鹊缂墼黾20%,某用户在5月份用电100度,共交电费56元,则a= .

5.为迎接“五一”劳动节,拉萨某商场举行优惠酬宾活动.某件商品的标价为630元,为吸引顾客,按标价的90%出售,这时仍可盈利67元,则这件商品的进价是

元.

6.某商品的价格标签已丢失,售货员只知道“它的进价为80元,打七折售出后,仍可获利5%”.你认为售货员应标在标签上的价格为 元.

三、解答题(共26分)

7.(8分)小明去文具店购买2B铅笔,店主说:“如果多买一些,给你打8折”,小明计算了一下.如果买50枝,比按原价购买可以便宜6元,那么每枝铅笔的原价是多少元?

8.(8分)甲、乙两件服装的.成本共500元,商店老板为获取利润,决定将甲服装按50%的利润定价,乙服装按40%的利润定价.在实际出售时,应顾客要求,两件服装均按9折出售,这样商店共获利157元,求甲、乙两件服装的成本各是多少元?

【拓展延伸】

9.(10分)某企业生产一种产品,每件成本为400元,销售价为510元,本季度销售了m件,为进一步扩大市场,该企业决定在降低销售价的同时降低成本,经过市场调研,预测下季度这种产品每件销售价降低4%,销售量将提高10%,要使销售利润(销售利润=销售价-成本价)保持不变,该产品每件的成本价应降低多少元?

答案解析

1.【解析】选D.设在售价的基础上提高x,原价为a,由题意得:a(1-20%)(1+x)=a,解得:x=25%.

2.【解析】选B.设该件商品进价为x元,根据题意得:x(1+20%)(1-20%)=96,解得:x=100,以96元出售,可见亏了4元.

3.【解析】选C.根据题意,生产这x件工艺品的销售利润=(550-350)x-200000

=200x-200000,

则当x=1000时,原式=0,

即x<1000,原式<0,销售利润为负值,

x=1000,原式=0,销售利润为零,

x>1000,原式>0,销售利润随着产量x的增大而增加,所以C错误.

4.【解析】因为100×0.5=50<56,故由题意,得

0.5a+(100-a)×0.5×(1+20%)=56,

解得a=40.

答案:40

5.【解析】设这件商品的进价是x元,由题意得:

630×90%=x+67,

解得:x=500.

答案:500

6.【解析】设售货员应标在标签上的价格为x元,

依据题意70%x=80×(1+5%),

解得:x=120.

答案:120

7.【解析】设每枝铅笔的原价为x元,由题意得:

50x-50x×80%=6,

解得:x=0.6,

答:每枝铅笔的原价为0.6元.

8.【解析】设甲服装的成本为x元,则乙服装的成本为

(500-x)元.由题意得:

(1+50%)x×90%-x+(1+40%)(500-x)×90%-(500-x)=157,

解得:x=300,所以乙服装的成本为500-300=200(元).

答:甲、乙两件服装的成本各是300元、200元.

9.【解析】设该产品每件的成本价应降低x元,则根据题意得

[510(1-4%)-(400-x)]×m(1+10%)=(510-400)m,

解得x=10.4.

八年级(上)期末检测题(二) 篇6

1. ——What are you going to be in the future?——____ engineer.

A. A B. AnC. TheD. 不填

2. On his day ____, he doesn’t want to go ____ a drive.

A. on; offB. of; withC. off; forD. away; in

3. She is going to ____ some money to travel somewhere interesting.

A. saveB. keepC. holdD. build

4. We all like her ____ she is kind and helpful.

A. soB. andC. becauseD. but

5. I don’t like doing the dishes because it’s ____.

A. interestingB. relaxingC. funD. boring

6. Could you ____ my pet dog when I’m away?

A. work onB. take outC. come overD. take care of

7. ——____ is the ticket?

——It’s only five yuan.

A. How many B. How muchC. How longD. How far

8. He often exercises. He is ____ than me.

A. athleticB. athleticerC. more athleticD. most athletic

9. It ____ him nearly an hour to get there by bike.

A. tookB. spent C. paidD. cost

10. Eating lots of vegetables and fruit can help us ____.

A. keep fitB. hang outC. look afterD. get back

11. ——What ____ animals can you see in the picture?

——I can see some sheep.

A. elseB. other C. anotherD. the other

12. ——Did Henry win a prize last year?

——____.

A. Yes, he won B. Yes, he did C. No, he didD. No, he won

13. ——How often do you go to the concert?

——____, I don’t like music at all.

A. Always B. Often C. Once a weekD. Never

14. Tom wants to take acting lessons when he grows up. He wants to be an ____.

A. engineerB. actor C. pilotD. programmer

15. ——Do you think fast food is popular in China?

——____. The Chinese usually have fast food for breakfast.

A. Yes, I think soB. No, I don’t think so

C. I hope soD. I hope not

Ⅱ.完形填空(10分)

Daniel Boone was born in the United States __1__ 1734. He didn’t go to school and couldn’t read, __2__ he learned all about the forests and many other things around him. He loved to __3__ alone in the forests because nothing would trouble him there.

When he grew up, he tried to live on a farm, but he wasn’t very __4__ and a year later he __5__ to go into the unknown western lands. When he returned after two years, he became__6__ for his long journey. He brought back many useful things, and they helped people a lot.

After this he kept __7__ to unknown places. The Indians liked him and became his __8__. Daniel Boone __9__ at the age of 86. He lived an interesting life in the early years of America and people remembered him __10__ an explorer and a pioneer.

1. A. in B. on C. at D. of

2. A. because B. butC. orD. and

3. A. liveB. helpC. askD. sit

4. A. busy B. tired C. kindD. happy

5. A. hatedB. decided C. worried D. forgot

6. A. famous B. slow C. excitingD. interested

7. A. leaving B. turningC. travelingD. hurrying

8. A. friends B. workersC. teachers D. travelers

9. A. lived B. stayed C. began D. died

10. A. to B. forC. asD. of

Ⅲ. 阅读理解(30分)

(A)

People usually talk about two groups of colors: warm colors and cool colors. Scientists think that there are also two kinds of people: people who prefer warm colors and people who prefer cool colors. The warm colors are red, orange and yellow. Where there are warm colors and a lot of lights, people usually want to be active. People think that red, for example, is exciting. Social people, those who like to be with others, like red. The cool colors are green, blue and violet. These colors, unlike warm colors, are relaxing. Where there are cool colors, people are usually quiet. People who like to spend time alone often prefer blue. Red may be exciting, but one scientist says that time seems to pass more slowly in a room with warm colors than in a room with cool colors. He says that a warm color, such as red or orange, is good color for a living room or a restaurant. People who are resting or eating do not want time to pass quickly. Cool colors are better for offices and factories if the people who are working there want time to pass quickly.

根据短文内容,选择正确答案:

1. According to the passage, people who don’t like to be with others ____.

A. like orange colorB. like blue color

C. prefer warm colorD. are usually active

2. The underlined word “Social people” means ____ in Chinese.

A. 城市居民B. 社会学家

C. 喜欢运动的人D. 好交际的人

3. Which of the following is TRUE according to this passage? ____.

A. Scientists like warm colors better than cool colors

B. Time seems to pass more quickly in a room with red than with violet

C. Time passes more slowly where there are cool colors

D. We’d better color a living room or restaurant in warm colors

4. Why are offices and factories often colored in cool colors according to the scientist? ____.

A. Because these colors can make time seem to pass more quickly

B. Because these colors can make people excited

C. Because everybody likes white color

D. Because working people can be more active

5. The best title of this passage should be ____.

A. Warm Colors and Cool Colors

B. People and Colors

C. Social People Like Warm Colors

D. Places and Colors

(B)

Lucy:

I went to the zoo and saw some sharks on summer vacation. I also got lots of exercises of course. I did my homework every day.

Andy:

On summer vacation, I did my homework. I went to the beach and I also took piano lessons. I had lots of fun.

Kate,

I’m going to have a party. I need some help. Could you please help me dosome shopping?I’d like to buy some drinks and fruits.

Thanks,

Tony

Zhou Hua,

We’re going to have a Chinese exam! My Chinese is poor. Could you help me learn Chinese?

Thanks,

Sally

Henry:

The most popular clothing store is Jason’s. There are the best quality clothing.

根据上面的内容,完成句子:

6. On summer vacation, both Lucy and Andy ____.

7. Lucy ____ and saw some sharks, but Andy didn’t.

8. Tony asks Kate to ____.

9. ____ asks ____ to help her learn Chinese.

10. Henry thinks Jason’s is the most popular clothing store because it has ____.

(C)

Almost everyone knows the meaning of Mr., Mrs. and Miss. People use Mr. with men’s last names. And Mrs. is for married women and Miss is for single (单身的) women. But what is Ms?

For sometimes, people in the United States use Ms before a women’s name when they do not know whether the woman is married or not. Today many people like to use Ms. Some women feel that it is not important for people to know whether they are married or not.

There are some problems with Ms. Not all women like it. Some like the old ways of doing things. They find it difficult to pronounce(发音) the word. But young people like it.

根据上面的短文,判断正(T)误(F)

11. People usually use Mrs. before single women’s names.

12. Mary is a married woman. So when we meet her, we can call her Miss Mary.

13. Not all women like the word “Ms”.

14. Some women find the word “Ms” is difficult to say.

15. Now young people like to use Ms.

Ⅳ.词汇考查:(10分)

1. ——Could you help me s____ the floor? ——Sure.

2. We usually b____ some books from our school library on Friday.

3. The p____ in the talent show are all very outstanding.

4. Although my home is far from school, I am s____ late for school.

5. My parents are b____ teachers.

6. Our school had a fashion show yesterday. U____(不幸地), the show was very dull.

7. I think Beckham is a t____(天才的) football player.

8. We are going to b____(建造) a subway in the middle of our city.

9. The ____(领导) of the school are going to visit your grandparents on Teachers’ Day.

10. Jean’s mother w____(担心) about her son very much, because he is badly ill.

Ⅴ.改错:请指出错误选项并改正。(5分)

1. There is going to have a sports meeting next Tuesday.

A BCD

2. Bob and Jane was watching TV this time yesterday.

ABC D

3. What a exciting book it is!

ABCD

4. The Great Wall is a symbol of the China nation.

A B C D

5. People can only get information about UFOs in books, TV and so on.

ABCD

Ⅵ. 根据汉语意思,完成下列句子:(10分)

1. 我们明天去动物园好吗?

____ we ____ to the zoo tomorrow?

2. 明天上午你有空吗?

____ you ____ tomorrow morning?

3. 为什么不和我们一起打篮球呢?

____ ____ ____ basketball with us?

4. 我们一起吃晚饭吧。

____ have dinner together.

5. 我想她不会游泳。

I ____ ____ she ____ swim.

6. 她今天下午没有什么事儿做。

She has ____ to ____ ____ afternoon.

7. 下个星期六你打算做什么?

____ are you ____ to ____ next Saturday?

8. 我不知道如何做这件事。

I don’t know ____ ____ ____ the work.

9. 你的手表没什么毛病。

There is____ ____ with your watch.

10. 我认为动物园里最有趣的动物是海豚。

I ____ the ____ ____ animal in the zoo is the dolphin.

Ⅶ.动词应用。阅读下面的短文,用括号内动词的正确形式填空:(10分)

Ann is an American girl. She __1__(have) big eyes and brown hair. She __2__ (study) in a middle school in Washington.

Ann __3__ (be) born on January 8th, 1992. She __4__ (start) school when she was only 6 years old. She studied in a primary school in New York before she __5__(move) to Washington with her family.

Ann’s favorite subject __6__(be) biology. She is interested in it very much. She wants __7__(major) in biology when she __8__(go) to college. But her music teacher says Ann should __9__(learn) music because she has a very good voice. She predicts (预测) that Ann __10__(become) a singer in the future.

Ⅷ.句型转换。(10分)

1. The sweaters feel very comfortable.(改为一般疑问句)

____ the sweaters____ very comfortable?

2. Excuse me. Where is the nearest school? (改为同义句)

Excuse me. ____ can I ____ to the nearest school?

3. Betty was sad. She heard about so many animals in danger.(两句合并为一句)

Betty was sad ____ ____ about many animals in danger.

4. There is no water in the bottle, ____ ____? (改为反意疑问句)

5. I watched TV last Sunday.(用at 9:00改写)

I ____ ____ TV at 9:00 last Sunday.

Ⅸ.补全对话(5分)

阅读下面的对话,根据对话内容补上所缺的句子,使对话意思完整。

A: Hi, Tom. You were not here yesterday afternoon. __1__?

B: __2__.

A: __3__. How are you feeling now?

B: Much better. The fever is gone, but I still cough and I feel weak.

A: Did you see the doctor?

B: Yes, I went to the doctor’s yesterday afternoon. The doctor gave me some medicine and asked me to __4__.

A: Why don’t you stay at home today?

B: Because I’m afraid I’ll miss too many lessons and I’ll be left behind.

A: Don’t worry. Take care of yourself. __5__.

B: Thank you.

Ⅹ.书面表达(15分)

根据表格所提供的有关张华的信息,写一篇短文介绍他的情况。

要求:1.表格内容要全部体现在文章中。

八年级数学检测题 篇7

1.当分式■的值为0时,x的值是( )

A. 0B. 1C. -1D. -2

2.如图1,某反比例函数的图像过点(-2,1),则此反比例函数表达式为( )

A. y=■B.y=-■

C.y=■D.y=-■

3.下列各组数分别为一个三角形三边的边长,其中能构成直角三角形的一组是( )

A. 1,2,3B. 2,3,4C. 3,4,5D. 4,5,6

4.四边形ABCD中,对角线AC、BD相交于点O,给出下列四组条件:①AB∥CD,AD∥BC;②AB=CD,AD=BC;③AO=CO,BO=DO;④AB∥CD,AD=BC。其中一定能判定这个四边形是平行四边形的条件有( )

A. 1组B. 2组C. 3组D. 4组

5.某班班长统计去年1~8月“书香校园”活动中全班同学的课外阅读数量(单位:本),绘制了如图2的折线统计图,下列说法正确的是( )

A. 极差是47B. 众数是42

C. 中位数是58D. 每月阅读数量超过40的有4个月

6.分式方程■=■的解是( )

A. x=-2B. x=2C. x=1D. x=1或x=2

7.如图3,A是反比例函数y=■的图像上的一点,AB⊥x轴于点B,且△ABO的面积是3,则k的值是( )

A. 3B. -3C. 6D.-6

8.如图4,小方格都是边长为1的正方形,则四边形ABCD的面积是( )

A. 25B. 12.5C. 9D. 8.5

9.如图5,在梯形ABCD中,AB∥CD,AD=BC,点E、F、G、H分别是AB、BC、CD、DA的中点,则下列结论一定正确的是( )

A. ∠HGF =∠GHE B. ∠GHE =∠HEF

C. ∠HEF =∠EFG D. ∠HGF =∠HEF

10.如图6,四边形ABCD中,AC=a,BD=b,且AC⊥BD,顺次连接四边形ABCD各边中点,得到四边形A1B1C1D1,再顺次连接四边形A1B1C1D1各边中点,得到四边形A2B2C2D2……如此进行下去,得到四边形AnBnCnDn。下列结论正确的有( )

①四边形A2B2C2D2是矩形;②四边形A4B4C4D4是菱形;

③四边形A5B5C5D5的周长■;④四边形AnBnCnDn的面积是■

A. ①②B. ②③C. ②③④D. ①②③④

二、 填空题

11.当________时,分式■有意义。

12.若点A(1,y1)、B(2,y2)是双曲线y=■上的点,则y1_______y2(填“>”“<”“=”)。

13.为备战全国皮划艇马拉松赛,甲、乙运动员进行了艰苦的训练,他们在相同条件下各划10次划艇成绩的平均数相同,方差分别为0.23、0.20,则成绩较为稳定的是_________(选填“甲”或“乙”)。

14.如图7,在Rt△ABC中,∠C=90°,BC=6 cm,AC=8 cm,按图中所示方法将△BCD沿BD折叠,使点C落在AB边的C′点,那么△ADC′的面积是_______。

15.如图8,菱形ABCD的对角线AC、BD相交于点O,且AC=8,BD=6,过点O作OH⊥AB,垂足为H,则点O到边AB的距离OH=_________。

16.如图9是由边长为1 m的正方形地砖铺设的地面示意图,小明沿图中所示的折线从A→B→C所走的路程为_______ m。(结果保留根号)

17.如图10,矩形ABCD中,∠BOC=120°,若将矩形沿EF折叠,则点B与点D重合, 下列结论中: ①若AB=8 cm,则AC=16 cm;② AE=OE=OF=CF;③若连接BE、DF,则图中共有4个等边三角形;④S△AOB=■S四边形DOFC。其中正确结论的序号为_______。(如果有若干个正确答案,填对全部正确答案得满分,漏填答案依次扣分,但填入错误的答案则判零分。)

三、解答题

18.先化简,再求值:■÷■,其中a=-5。

19.如图11,等腰梯形ABCD中,AD∥BC,M是BC的中点,

求证:∠DAM=∠ADM。

20.已知,如图12所示,折叠长方形的一边AD,使点D落在BC边的点F处,如果AB=8 cm,BC=10 cm,求EC的长。

21.某中学开展唱歌比赛活动,九年级(1)、(2)班根据初赛成绩,各选出5名选手参加复赛,两个班各选出的5名选手的复赛成绩(满分为100分)如图13所示。

(1)根据图示填写下表:

(2)结合两班复赛成绩的平均数和中位数,分析哪个班级的复赛成绩较好;

(3)计算两班复赛成绩的方差。

(方差公式:s2=■[(x1-■)2+(x2-■)2+…+(xn-■)2])

22.七(1)班的课间活动丰富多彩,小峰与小月进行跳绳比赛。在相同的时间内,小峰跳了100个,小月跳了110个。如果小月比小峰每分钟多跳20个,试求出小峰每分钟跳绳多少个?

23.如图14,已知E、F分别是?荀ABCD的边BC、AD上的点,且BE=DF。

(1)求证:四边形AECF是平行四边形;

(2)若BC=10,∠BAC=90°,且四边形AECF是菱形,求BE的长。

1.B 2.B 3.C 4.C 5.C 6.C 7.C 8.B 9.D 10.C

11.x≠3 12.> 13.乙 14.6 cm2 15.■ 16.2■ 17.①②③

18.解:■÷■=■×■=■

当a=-5时,原式=■=■=■=3。

19.证明:因为梯形ABCD是等腰梯形,

所以∠B=∠C,∠BAD=∠ADC。

因为M是BC的中点,所以BM=CM。

又因为AB=DC,所以△ABM≌△DCM。

所以∠BAM=∠MDC。

因为∠BAD=∠ADC,所以∠DAM=∠ADM。

20.解:连接AE,则△ADE≌△AFE,所以AF=AD=10,DE=EF。设CE=x,则EF=DE=8-x,在Rt△ABF中,BF 2=AF 2-AB2,解得BF=6,则CF=4。在Rt△CEF中,EF2=CE2+CF2,即(8-x)2=x2+16,故x=3 cm。

21.(1)填表:

(2)九(1)班成绩好些。因为两个班级的平均数都相同,九(1)班的中位数高,所以在平均数相同的情况下中位数高的九(1)班成绩好些。(回答合理即可给分)

(3)s21=■=70,

s22=■=160。

22.解:设小峰每分钟跳绳x个,则小月每分钟跳绳(x+20)个,由题意得

■=■,解得x=200。

答:小峰每分钟跳绳200个。

23.(1)证明:因为四边形ABCD是平行四边形,所以AD∥BC,且AD=BC,所以AF∥EC,因为BE=DF,所以AF=EC,所以四边形AECF是平行四边形。

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