2015-2016学年河北省石家庄市栾城县七年级上学期期末数学试卷(带解析)

适用年级:初一
试卷号:567350

试卷类型:期末
试卷考试时间:2017/7/27

1.单选题(共7题)

1.
如图,数轴上的A,B,C三点所表示的数分别为a,b,c,其中AB=BC.如果,那么该数轴的原点O的位置应该在(   )
A.点A的左边
B.点A与点B之间
C.点B与点C之间(靠近点B)
C.点C的右边
2.
现定义一种新运算“※”,对任意有理数a、b,规定a※b=ab+a﹣b,例如:1※2=1×2+1﹣2=1,则2※(﹣3)等于()
A.﹣3B.﹣2C.﹣1D.0
3.
下列生活、生产现象中,其中可用“两点之间,线段最短”来解释的现象有(  )
①用两颗钉子就可以把木条固定在墙上;
②植树时,只要栽下两棵树,就可以把同一行树栽在同一直线上;
③从A到B架设电线,总是尽可能沿线段AB架设;
④把弯曲的公路改直,就能缩短路程.
A.①②B.①③C.②④D.③④
4.
如果m和n互为相反数,则化简(3m﹣2n)﹣(2m﹣3n)的结果是( )
A.﹣2B.0C.2D.3
5.
下列计算正确的是(   )
A.3a+2a=5a2B.3a-a=3C.2a3+3a2=5a5D.-a2b+2a2b=a2b
6.
如图,数轴上的三点所表示的数分别为,其中,如果|那么该数轴的原点的位置应该在(   )
A.点的左边B.点与点之间C.点与点之间D.点的右边
7.
某商场把一个双肩背书包按进价提高50%标价,然后再按八折出售,这样商场每卖出一个书包就可赢利8元.设每个双肩背书包的进价是x元,根据题意列一元一次方程,正确的是(    )
A.(1+50%)x•80%-x=8
B.50%x•80%-x=8
C.(1+50%)x•80%=8
D.(1+50%)xx=8

2.选择题(共2题)

8.

用所给词的适当形式填空

①I{#blank#}1{#/blank#} (have/has)told him the news.

②She{#blank#}2{#/blank#} (have/has)come back from school.

③Did you{#blank#}3{#/blank#} (won/win)the first prize yesterday?

④There is a farmer{#blank#}4{#/blank#} (called/calling)Tom.

⑤It doesn’t need{#blank#}5{#/blank#} (to be/being)true.

⑥Her job is{#blank#}6{#/blank#} (to clean/cleaned)the streets.  

⑦I{#blank#}7{#/blank#} (beat/won)him in the tennis game yesterday.

⑧ Has he{#blank#}8{#/blank#} (visited/visiting)the Great Wall?

⑨I can’t afford{#blank#}9{#/blank#} (buying/to buy)the building.

⑩ Class begins.  Stop{#blank#}10{#/blank#} (talking/to talk).

9.

用所给词的适当形式填空

①I{#blank#}1{#/blank#} (have/has)told him the news.

②She{#blank#}2{#/blank#} (have/has)come back from school.

③Did you{#blank#}3{#/blank#} (won/win)the first prize yesterday?

④There is a farmer{#blank#}4{#/blank#} (called/calling)Tom.

⑤It doesn’t need{#blank#}5{#/blank#} (to be/being)true.

⑥Her job is{#blank#}6{#/blank#} (to clean/cleaned)the streets.  

⑦I{#blank#}7{#/blank#} (beat/won)him in the tennis game yesterday.

⑧ Has he{#blank#}8{#/blank#} (visited/visiting)the Great Wall?

⑨I can’t afford{#blank#}9{#/blank#} (buying/to buy)the building.

⑩ Class begins.  Stop{#blank#}10{#/blank#} (talking/to talk).

3.填空题(共1题)

10.
如果单项式xa+1y3与2x3yb是同类项,那么ab=    

4.解答题(共2题)

11.
计算:
(1)先化简,再求值:(3x2﹣4)+(2x2+5x﹣6)﹣2(x2﹣5),其中x=﹣2
(2)解方程:=2.
12.
如图,已知∠COA=90°,∠COD比∠DOA大28°,且OB是∠COA的平分线.

(1)求∠BOD的度数;
(2)将已知条件中的28°改为32°,则∠BOD=
(3)将已知条件中的28°改为n°,则∠BOD=     
试卷分析
  • 【1】题量占比

    单选题:(7道)

    选择题:(2道)

    填空题:(1道)

    解答题:(2道)

  • 【2】:难度分析

    1星难题:0

    2星难题:0

    3星难题:0

    4星难题:0

    5星难题:0

    6星难题:0

    7星难题:0

    8星难题:0

    9星难题:10