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如图,一个空间几何体的主视图和左视图都是边长为1的正三角形,俯视图是一个圆,那么...
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如图,一个空间几何体的主视图和左视图都是边长为1的正三角形,俯视图是一个圆,那么这个几何体的侧面积为( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131023212147954832982/SYS201310232121479548329002_ST/0.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131023212147954832982/SYS201310232121479548329002_ST/1.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131023212147954832982/SYS201310232121479548329002_ST/2.png)
D.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131023212147954832982/SYS201310232121479548329002_ST/3.png)
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