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华师大七年级上期中模拟试卷

华师大七年级上期中模拟试卷
华师大七年级上期中模拟试卷

初一数学期中模拟试卷

一、 填空(每空2分,共计32分)

1、计算:=?-3

2

x x ____________, )5)(1(-+x x =____________; 2、不等式组??

?<->-1301x x 的解集是____________,不等式组???≤≥3

3

x x 的解集是____________。

3、若关于x 的方程33-=+x m x 的根是负数,则m 的范围是____________;

4、已知方程组???-=++=+m

y x m

y x 13313的解满足10<+

____________; 5、如果不等式组??

?>

x x 8

有解,则m 的取值范围是____________;

6、角α的补角为∠α的5倍,则∠α=___________度;

7、若平面内有三个点,则过这三个点中的任意两个点可

以确定的直线的条数为____________;

8、如图,已知∠AOB 是平角,∠BOD=∠AOD ,∠AOC=∠BOE ,

那么图中与∠COD 互余的角为____________; 9、已知A 、B 是数轴上的两个点,分别表示数3和-7,

则线段AB 的中点所表示的数是____________; 10、如图所示,在图中的∠1、∠2、∠3、∠4、∠5和

∠B 中,同位角是_____________________,内错角是

___________________;

11、钟面上1点50分时,时针与分针的夹角是____________度;

12、在直线l 上取A 、B 两点,使AB=12cm ,再在l 上取一点C ,使AC :BC=3:1,M 、N 分

别是AB 、AC 的中点,则 线段MN 的长度为_____________cm ;

二、选择题(每小题3分,共计18分)

13、已知a >b 则下列不等式中正确的是( )

A

B

C D

E O

(第 8 题)

A

B

C

D E

F

(第 10 题)

-104

(第 15 题)

(A) —3a >—3b ;

(B) 3

3b

a ->-

; (C) 3—a >3—b ;

(D) a -3>b -3;

14、计算()()3

2

a b b a -?-的结果是( )

(A) ()5

b a -; (B) ()6

b a --;

(C) ()5

a b -; (D) ()6

b a -;

15、下图表示的不等式组的解集是( )

(A) 1<x <4; (B) 1≤x <4;(C) 1>x >4; (D) 1<x ≤4; 16、如果142+=y x ,1

3

27+=x y

,则y x -的值为( )

(A) –5; (B) +4; (C) 5; (D) 0; 17、如图所示,下面的说法中正确的是( )

(A) OA 的方向是北偏东25°; (B) OB 的方向是北偏西30°; (C )OC 的方向是西偏南75°;

(D) OD 的方向是西北方向;

18、下列说法中正确的有( )个

①经过直线上一点有且只有一条直线垂直于这条直线; ②从直线外一点到这条直线的垂线段叫做点到直线的距离; ③有一边互为反向延长线,且相等的两个角是对顶角; ④有一条公共边且互补的两个角是邻补角; (A ) 0; (B) 1; (C) 2; (D) 3;

三、解下列不等式(组)并把解集在数轴上表示出来(每题5分共10分): 19、6

1

2131≤-++x x ;

(第 17 题)

20、??

?

??-+<-+<-)3)(4()3(3

1

212x x x x x ;

四、计算(每题5分共20分)

21、(

)

??

?

??-?-32

4

412xy y x ;

22、()

2002

2001

2000

6.021232-??

?? ?

?

-??

?

?

??;

23、()()()()234332323-+-+-x x x x ; 24、()

211

543++--+n n n

n x x x

x ;

五、画图题(4分)

25、在图中取AC 的中点D ,并连结BD ,再分别画出点A 、点C 到BD 的垂线段AE 、CF ,

用圆规比较AE 、CF 的大小:AE CF ;

六、化简求值(4分):

26、)()()(y x z x z y z y x -+---,其中2

1

,1,21-===z y x ;

七、解答题:(5分+7分)

27、试 求适当的a 、b 值,使)52)(1132(2

2

-+++-x x bx ax 的积的展开式中不再含有

32,x x 的项;(5分)

28、某校组织学生到距离学校5千米以外的光明科技馆去参观,学生王红因事没能上学

校的包车,于是准备在学校门口改乘出租车去光明科技馆,出租车的收费标准如下:

(1)设出租车行驶的里程数为x (x ≥3)千米,则费用y= 。 (2)王红同学身上仅有15.4元钱,他估计自已能按规定支付车费,故乘出租车赶

到了光明科技馆。那么学校距科技馆的路程在什么范围内。(7分)

初 一 数 学 答 案

一、

1、5

x -, 542

--x x 2、2>x , 3=x 3、3-

5、8

6、30

7、3条或1条

8、AOC ∠和BOE ∠ 9、2-

10、1∠与∠B ,∠B 与∠4,∠3与∠4,∠2与∠5, 11、?115 12、1.5或3 二、

13、D 14、C 15、B 16、C 17、B 18、B

三、 19、5

2≤x 20、53<

921y x -

22、9.0- 23、

四、25、五、26、六、27、?

?

?-102a 28、(1))3(1810-+=x y

(2)大于5千米小于等于6千米,学校距科技馆的路程。

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