满分5 >
高中数学试题 >
四棱锥P-ABCD的三视图如图所示,四棱锥P-ABCD的五个顶点都在一个球面上,...
四棱锥P-ABCD的三视图如图所示,四棱锥P-ABCD的五个顶点都在一个球面上,E、F分别是棱AB、CD的中点,直线EF被球面所截得的线段长为
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102420930743711/SYS201311031024209307437010_ST/0.png)
,则该球表面积为( )
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102420930743711/SYS201311031024209307437010_ST/images1.png)
A.12π
B.24π
C.36π
D.48π
考点分析:
相关试题推荐
设F
1、F
2分别是椭圆
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102420930743711/SYS201311031024209307437009_ST/0.png)
+
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102420930743711/SYS201311031024209307437009_ST/1.png)
=1(a>b>0)的左、右焦点,与直线y=b相切的⊙F
2交椭圆于E,且E是直线EF
1与⊙F
2的切点,则椭圆的离心率为( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102420930743711/SYS201311031024209307437009_ST/2.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102420930743711/SYS201311031024209307437009_ST/3.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102420930743711/SYS201311031024209307437009_ST/4.png)
D.
查看答案
已知直线a和平面α,β,α∩β=l,a⊄α,a⊄β,且a在α,β内的射影分别为直线b和c,则b和c的位置关系是( )
A.相交或平行
B.相交或异面
C.平行或异面
D.相交﹑平行或异面
查看答案
若圆C:x
2+y
2+2x-4y+3=0关于直线2ax+by+6=0对称,则由点(a,b)向圆C所作切线长的最小值是( )
A.2
B.3
C.4
D.6
查看答案
在△ABC中,角A,B,C所对的边分别为a,b,c,S表示△ABC的面积,若acosB+bcosA=csinC,S=
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102420930743711/SYS201311031024209307437006_ST/0.png)
(b
2+c
2-a
2),则∠B=( )
A.90°
B.60°
C.45°
D.30°
查看答案
各项都是正数的等比数列{a
n}中,a
2,
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102420930743711/SYS201311031024209307437005_ST/0.png)
a
3,a
1成等差数列,则
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102420930743711/SYS201311031024209307437005_ST/1.png)
的值为( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102420930743711/SYS201311031024209307437005_ST/2.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102420930743711/SYS201311031024209307437005_ST/3.png)
C.-
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102420930743711/SYS201311031024209307437005_ST/4.png)
D.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102420930743711/SYS201311031024209307437005_ST/5.png)
或
查看答案