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如图是一个几何体的三视图.若它的表面积为7π,则正(主)视图中a=( ) A.1...
如图是一个几何体的三视图.若它的表面积为7π,则正(主)视图中a=( )
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102344468841989/SYS201311031023444688419007_ST/images0.png)
A.1
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102344468841989/SYS201311031023444688419007_ST/0.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102344468841989/SYS201311031023444688419007_ST/1.png)
D.2
考点分析:
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![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102344468841989/SYS201311031023444688419002_ST/0.png)
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的夹角为( )
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