满分5 >
初中数学试题 >
下列事件中,必然发生的为( ) A.我市冬季比秋季的平均气温低 B.走到车站公共...
下列事件中,必然发生的为( )
A.我市冬季比秋季的平均气温低
B.走到车站公共汽车正好开过来
C.打开电视机正转播奥运会实况
D.掷一枚均匀硬币正面一定朝上
考点分析:
相关试题推荐
如图,在Rt△ABC中,∠C=90°,AB=5,AC=2,则cosA的值是( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101190304887653392/SYS201311011903048876533006_ST/images0.png)
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101190304887653392/SYS201311011903048876533006_ST/0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101190304887653392/SYS201311011903048876533006_ST/1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101190304887653392/SYS201311011903048876533006_ST/2.png)
D.
查看答案
函数y=ax+1与y=ax
2+bx+1(a≠0)的图象可能是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101190304887653392/SYS201311011903048876533005_ST/images0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101190304887653392/SYS201311011903048876533005_ST/images1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101190304887653392/SYS201311011903048876533005_ST/images2.png)
D.
查看答案
抛物线y=2(x+1)
2-3的顶点坐标是( )
A.(1,3)
B.(-1,3)
C.(1,-3)
D.(-1,-3)
查看答案
如图,水平放置的圆柱形物体,中间有一细棒,则此几何体的左视图是( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101190304887653392/SYS201311011903048876533003_ST/images0.png)
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101190304887653392/SYS201311011903048876533003_ST/images1.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101190304887653392/SYS201311011903048876533003_ST/images2.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101190304887653392/SYS201311011903048876533003_ST/images3.png)
D.
查看答案
sin30°的值是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101190304887653392/SYS201311011903048876533002_ST/0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101190304887653392/SYS201311011903048876533002_ST/1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131101190304887653392/SYS201311011903048876533002_ST/2.png)
D.1
查看答案