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一个空间几何体的正视图、侧视图均是长为2、高为3的矩形,俯视图是直径为2的圆(如...
一个空间几何体的正视图、侧视图均是长为2、高为3的矩形,俯视图是直径为2的圆(如图),则这个几何体的表面积为( )
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A.12+π
B.7π
C.8π
D.20π
考点分析:
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