2013年初中毕业升学考试(四川攀枝花卷)数学(带解析)

适用年级:初三
试卷号:593391

试卷类型:中考真题
试卷考试时间:2017/7/26

1.单选题(共4题)

1.
﹣5的相反数是()
A.B.C.D.5
2.
已知实数x,y,m满足,且y为负数,则m的取值范围是()
A.m>6B.m<6C.m>﹣6D.m<﹣6
3.
如图,在△ABC中,∠CAB=70°,将△ABC绕点A逆时针旋转到△AB′C′的位置,使得CC′∥AB,则∠BAB′的度数是(  )
A.70°B.35°C.40°D.50°
4.
下列图形中,既是轴对称图形,又是中心对称图形的是()
A.平行四边形B.矩形C.正三角形D.等腰梯形

2.选择题(共13题)

5.如图所示,电源电压为6V且保持不变,定值电阻R0=20Ω,在开关S闭合的情况下,下列说法中正确的是(   )

6.如图所示,电源电压为6V且保持不变,定值电阻R0=20Ω,在开关S闭合的情况下,下列说法中正确的是(   )

7.小明游泳时发现,人在水中越往深处走就越觉得所受的浮力越大,由此他猜想:“浮力的大小可能与物体浸入水中的深度有关或者与物体排开水的体积有关”,于是他找来一个金属圆柱体、弹簧测力计、烧杯和水等器材进行了如图1所示的探究.

8.小明游泳时发现,人在水中越往深处走就越觉得所受的浮力越大,由此他猜想:“浮力的大小可能与物体浸入水中的深度有关或者与物体排开水的体积有关”,于是他找来一个金属圆柱体、弹簧测力计、烧杯和水等器材进行了如图1所示的探究.

9.小明游泳时发现,人在水中越往深处走就越觉得所受的浮力越大,由此他猜想:“浮力的大小可能与物体浸入水中的深度有关或者与物体排开水的体积有关”,于是他找来一个金属圆柱体、弹簧测力计、烧杯和水等器材进行了如图1所示的探究.

10.三个质量相同,底面积相同,但形状不同的容器放在水平桌面上,其内分别装有甲、乙、丙三种液体,它们的液面在同一水平面上,如图所示,若容器对桌面的压强相等,则三种液体对容器底的压强(   )

11.三个质量相同,底面积相同,但形状不同的容器放在水平桌面上,其内分别装有甲、乙、丙三种液体,它们的液面在同一水平面上,如图所示,若容器对桌面的压强相等,则三种液体对容器底的压强(   )

12.三个质量相同,底面积相同,但形状不同的容器放在水平桌面上,其内分别装有甲、乙、丙三种液体,它们的液面在同一水平面上,如图所示,若容器对桌面的压强相等,则三种液体对容器底的压强(   )

13.物理兴趣小组设计了一个便携式水深测量仪.它主要是由探头A和控制盒B构成,它们之间用有绝缘皮的细导线相连形成回路,如图甲所示.其中探头A是一个底面积为10cm2、高5cm、重2.5N的圆柱体,探头A的底部为压敏电阻R(R与水接触的表面涂有绝缘漆),工作时底部始终与水平面相平,压敏电阻R随表面压力大小的变化如图乙所示.A和B间的电路连接关系如图丙所示,其中电源电压恒为3V,电流表盘改装成深度表(导线的重力与体积均不计).兴趣小组的同学将探头A缓慢放入水中,求:

14.如图甲所示,电源电压不变,R1=15Ω,滑动变阻器R2标有“5Ω  1A”字样.当R2的滑片P在b端且只闭合开关S、S1时,电流表的示数为0.3A当R2的滑片P在a端且同时闭合S、S1、S2时,灯泡正常发光当R2的滑片P在b端且只闭合开关S、S2时,电压表的示数为3V,如图乙是灯泡的电流﹣电压图象,下列说法正确的是(   )

15.如图甲所示,电源电压不变,R1=15Ω,滑动变阻器R2标有“5Ω  1A”字样.当R2的滑片P在b端且只闭合开关S、S1时,电流表的示数为0.3A当R2的滑片P在a端且同时闭合S、S1、S2时,灯泡正常发光当R2的滑片P在b端且只闭合开关S、S2时,电压表的示数为3V,如图乙是灯泡的电流﹣电压图象,下列说法正确的是(   )

16.

阅读理解

    A man had a little dog, and he liked it a lot. He would pat (拍) its head, put it on his knee and talk to it. Then he would give it some food from his own plate.

    A donkey (驴子) looked in through the window and saw the man and the dog.

    " Why doesn't he choose me as his pet?" said the donkey. "It is not fair. I work hard, and the dog only shakes its tail, barks and jumps onto the master's (主人) knee. It is not fair. "

    Then the donkey said to himself, "If I do what the dog does, the master may choose me as

his pet. "

    So the donkey ran into the room. He brayed (嘶叫) at the top of his voice. He shook his tail so hard that he knocked over a jar on the table. Then he tried to jump onto the master's knee.

    The master thought the donkey was maniacal , and he shouted, "Help ! Help ! "

    Some men came running in with sticks in their hands and they beat the donkey until he ran out of the house.

"I only did what the dog did, " said the donkey, "and yet they still regard the dog as their pet and they beat me with sticks. It is not fair. "

根据短文内容,选择最佳答案,并将其标号填涂在答题卡相应位置。

17.

阅读理解

    A man had a little dog, and he liked it a lot. He would pat (拍) its head, put it on his knee and talk to it. Then he would give it some food from his own plate.

    A donkey (驴子) looked in through the window and saw the man and the dog.

    " Why doesn't he choose me as his pet?" said the donkey. "It is not fair. I work hard, and the dog only shakes its tail, barks and jumps onto the master's (主人) knee. It is not fair. "

    Then the donkey said to himself, "If I do what the dog does, the master may choose me as

his pet. "

    So the donkey ran into the room. He brayed (嘶叫) at the top of his voice. He shook his tail so hard that he knocked over a jar on the table. Then he tried to jump onto the master's knee.

    The master thought the donkey was maniacal , and he shouted, "Help ! Help ! "

    Some men came running in with sticks in their hands and they beat the donkey until he ran out of the house.

"I only did what the dog did, " said the donkey, "and yet they still regard the dog as their pet and they beat me with sticks. It is not fair. "

根据短文内容,选择最佳答案,并将其标号填涂在答题卡相应位置。

3.填空题(共3题)

18.
(2013年四川攀枝花4分)计算:  
19.
若分式的值为0,则实数x的值为  
20.
某次数学测验中,某班六位同学的成绩分别是:86,79,81,86,90,84,这组数据的众数是  ,中位数是  

4.解答题(共4题)

21.
先化简,再求值:,其中a=
22.
(2013年四川攀枝花12分)如图,在平面直角坐标系中,四边形ABCD是梯形,AB∥CD,点B(10,0),C(7,4).直线l经过A,D两点,且sin∠DAB=.动点P在线段AB上从点A出发以每秒2个单位的速度向点B运动,同时动点Q从点B出发以每秒5个单位的速度沿B→C→D的方向向点D运动,过点P作PM垂直于x轴,与折线A→D→C相交于点M,当P,Q两点中有一点到达终点时,另一点也随之停止运动.设点P,Q运动的时间为t秒(t>0),△MPQ的面积为S.

(1)点A的坐标为  ,直线l的解析式为  
(2)试求点Q与点M相遇前S与t的函数关系式,并写出相应的t的取值范围;
(3)试求(2)中当t为何值时,S的值最大,并求出S的最大值;
(4)随着P,Q两点的运动,当点M在线段DC上运动时,设PM的延长线与直线l相交于点N,试探究:当t为何值时,△QMN为等腰三角形?请直接写出t的值.
23.
如图,直线y=k1x+b(k1≠0)与双曲线(k2≠0)相交于A(1,2)、B(m,﹣1)两点.

(1)求直线和双曲线的解析式;
(2)若A1(x1,y1),A2(x2,y2),A3(x3,y3)为双曲线上的三点,且x1<0<x2<x3,请直接写出y1,y2,y3的大小关系式;
(3)观察图象,请直接写出不等式k1x+b>的解集.
24.
如图所示,已知在平行四边形ABCD中,BE=DF
求证:AE=CF.
试卷分析
  • 【1】题量占比

    单选题:(4道)

    选择题:(13道)

    填空题:(3道)

    解答题:(4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:1

    5星难题:0

    6星难题:4

    7星难题:0

    8星难题:1

    9星难题:5