满分5 >
初中数学试题 >
一布袋中有红球8个,白球12个和黄球5个,它们除了颜色外没有其它区别,闭上眼睛,...
一布袋中有红球8个,白球12个和黄球5个,它们除了颜色外没有其它区别,闭上眼睛,随机从袋中取出1球不是黄球的概率为( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000546892848991/SYS201311030005468928489002_ST/0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000546892848991/SYS201311030005468928489002_ST/1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000546892848991/SYS201311030005468928489002_ST/2.png)
D.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000546892848991/SYS201311030005468928489002_ST/3.png)
考点分析:
相关试题推荐
下列四幅图形中,表示两颗圣诞树在同一时刻阳光下的影子的图形可能是( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000546892848991/SYS201311030005468928489001_ST/images0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000546892848991/SYS201311030005468928489001_ST/images1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000546892848991/SYS201311030005468928489001_ST/images2.png)
D.
查看答案
如图摆放的几何体的左视图是( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000546892848991/SYS201311030005468928489000_ST/images0.png)
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000546892848991/SYS201311030005468928489000_ST/images1.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000546892848991/SYS201311030005468928489000_ST/images2.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000546892848991/SYS201311030005468928489000_ST/images3.png)
D.
查看答案
一次函数y=2x+3与二次函数y=ax
2+bx+c的图象交于A(m,5)和B(3,n)两点,且点B是抛物线的顶点.
(1)求二次函数的表达式;
(2)在同一坐标系中画出两个函数的图象;
(3)从图象上观察,x为何值时,一次函数与二次函数的值都随x的增大而增大,当x为何值时,二次函数值大于一次函数值?
查看答案
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000546892737738/SYS201311030005468927377022_ST/images0.png)
如图,在⊙M中,弧AB所对的圆心角为120°,已知⊙M的半径为2cm,并建立如图所示的直角坐标系.
(1)求圆心M的坐标;
(2)求经过A,B,C三点的抛物线的解析式;
(3)点D是弦AB所对的优弧上一动点,求四边形ACBD的最大面积.
查看答案
如图,已知一次函数y=kx+b(k≠0)的图象与反比例函数y=
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000546892737738/SYS201311030005468927377021_ST/0.png)
的图象交于A,B两点,且A点的横坐标与B点的纵坐标都是-2.
(1)一次函数的解析式;
(2)△AOB的面积.
查看答案