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【单选题】
环丙烷的结构式可表示为：△，而环己烷由于各个原子在空间的排列方式不同，却有下列两种空间体：上一个为椅式（反式），下面一个为船式（顺式）。试判断当环己烷的不同碳原子上连有两个甲基(-CH 3 )时，包括甲基在六个碳原子位置不同和空间在内，共有体数目是……（ ）A.
2
B.
6
C.
12
D.
14
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A.
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B.
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D.
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A.
likes playing computer games
B.
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C.
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D.
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