满分5 >
初中数学试题 >
(2010•贵阳)如图,AB是⊙O的直径,C是⊙O上的一点,若AC=8,AB=1...
(2010•贵阳)如图,AB是⊙O的直径,C是⊙O上的一点,若AC=8,AB=10,OD⊥BC于点D,则BD的长为( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019110446146578092/SYS201310191104461465780016_ST/images0.png)
A.1.5
B.3
C.5
D.6
考点分析:
相关试题推荐
(2007•滨州)一矩形硬纸板绕其竖直的一边旋转180°所形成的几何体的主视图和俯视图分别为( )
A.矩形,矩形
B.圆,半圆
C.圆,矩形
D.矩形,半圆
查看答案
(2007•滨州)如图,梯子(长度不变)跟地面所成的锐角为A,关于∠A的三角函数值与梯子的倾斜程度之间,叙述正确的是( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019110446146578092/SYS201310191104461465780014_ST/images0.png)
A.sinA的值越大,梯子越陡
B.cosA的值越大,梯子越陡
C.tanA的值越小,梯子越陡
D.陡缓程度与∠A的函数值无关
查看答案
(2007•滨州)如图,在Rt△ABC中,∠C=90°,AC=3.将其绕B点顺时针旋转一周,则分别以BA、BC为半径的圆形成一圆环.该圆环的面积为( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019110446146578092/SYS201310191104461465780013_ST/images0.png)
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019110446146578092/SYS201310191104461465780013_ST/0.png)
π
B.3π
C.9π
D.6π
查看答案
(2007•滨州)如图,点P为反比例函数
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019110446146578092/SYS201310191104461465780012_ST/0.png)
上的一动点,作PD⊥x轴于点D,△POD的面积为k,则函数y=kx-1的图象为( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019110446146578092/SYS201310191104461465780012_ST/images1.png)
A.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019110446146578092/SYS201310191104461465780012_ST/images2.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019110446146578092/SYS201310191104461465780012_ST/images3.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019110446146578092/SYS201310191104461465780012_ST/images4.png)
D.
查看答案
(2007•滨州)关于x的一元二次方程(m+1)
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131019110446146578092/SYS201310191104461465780011_ST/0.png)
+4x+2=0的解为( )
A.x
1=1,x
2=-1
B.x
1=x
2=1
C.x
1=x
2=-1
D.无解
查看答案