满分5 >
初中数学试题 >
如图,是小华画的正方形风筝图案,他以图中的对角线AB为对称轴,在对角线的下方再画...
如图,是小华画的正方形风筝图案,他以图中的对角线AB为对称轴,在对角线的下方再画一个三角形,使得新的风筝图案成为轴对称图形,若下列有一图形为此对称图形,则此图为( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164346518582711/SYS201310221643465185827009_ST/images0.png)
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164346518582711/SYS201310221643465185827009_ST/images1.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164346518582711/SYS201310221643465185827009_ST/images2.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164346518582711/SYS201310221643465185827009_ST/images3.png)
D.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164346518582711/SYS201310221643465185827009_ST/images4.png)
考点分析:
相关试题推荐
将直径为60cm的圆形铁皮,做成三个相同的圆锥容器的侧面(不浪费材料,不计接缝处的材料损耗),那么每个圆锥容器的底面半径为( )
A.10cm
B.30cm
C.45cm
D.300cm
查看答案
已知圆O
1、圆O
2的半径不相等,圆O
1的半径长为3,若圆O
2上的点A满足AO
1=3,则圆O
1与圆O
2的位置关系是( )
A.相交或相切
B.相切或相离
C.相交或内含
D.相切或内含
查看答案
如图1是一张Rt△ABC纸片,如果用两张相同的这种纸片恰好能拼成一个正三角形,如图2,那么在Rt△ABC中,sin∠B的值是( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164346518582711/SYS201310221643465185827006_ST/images0.png)
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164346518582711/SYS201310221643465185827006_ST/0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164346518582711/SYS201310221643465185827006_ST/1.png)
C.1
D.
查看答案
10名同学分成甲、乙两队进行篮球比赛,它们的身高(单位:cm)如下表所示:
| 队员1 | 队员2 | 队员3 | 队员4 | 队员5 |
甲队 | 177 | 176 | 175 | 172 | 175 |
乙队 | 170 | 175 | 173 | 174 | 183 |
设两队队员身高的平均数依次为
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164346518582711/SYS201310221643465185827005_ST/0.png)
,
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164346518582711/SYS201310221643465185827005_ST/1.png)
,身高的方差依次为S
甲2,S
乙2,则下列关系中完全正确的是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164346518582711/SYS201310221643465185827005_ST/2.png)
=
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164346518582711/SYS201310221643465185827005_ST/3.png)
,S
甲2>S
乙2B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164346518582711/SYS201310221643465185827005_ST/4.png)
=
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164346518582711/SYS201310221643465185827005_ST/5.png)
,S
甲2<S
乙2C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164346518582711/SYS201310221643465185827005_ST/6.png)
>
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164346518582711/SYS201310221643465185827005_ST/7.png)
,S
甲2>S
乙2D.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164346518582711/SYS201310221643465185827005_ST/8.png)
<
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164346518582711/SYS201310221643465185827005_ST/9.png)
,S
甲2>S
乙2
查看答案
如图是由正方体和圆锥组成的几何体,它的俯视图是( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164346518582711/SYS201310221643465185827004_ST/images0.png)
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164346518582711/SYS201310221643465185827004_ST/images1.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164346518582711/SYS201310221643465185827004_ST/images2.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131022164346518582711/SYS201310221643465185827004_ST/images3.png)
D.
查看答案