题目内容

体的三面投影图间的关系是[ ]。

A. V面投影和H面投影符合上下相等，即“高相等”的关系
B. V面投影和W面投影符合上下对齐，即“高平齐”的关系
C. V面投影和H面投影符合左右对正，即“长对正”的关系
D. V面投影和H面投影符合左右相等，即“长相等”的关系

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