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如图,以圆柱的下底面为底面,上底面圆心为顶点的圆锥的母线长为4,高线长为3,则圆...
如图,以圆柱的下底面为底面,上底面圆心为顶点的圆锥的母线长为4,高线长为3,则圆柱的侧面积为( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103102505355716225/SYS201311031025053557162012_ST/images0.png)
A.30π
B.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103102505355716225/SYS201311031025053557162012_ST/0.png)
π
C.20π
D.
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103102505355716225/SYS201311031025053557162012_ST/1.png)
π
考点分析:
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