题目内容

两直线在空间当中互相垂直，那么它们的投影互相垂直。

A. 对
B. 错

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一条直线的正面投影与坐标轴X平行，另一条直线的正面投影与之正面投影垂直，空间当中两直线垂直。

A. 对
B. 错

空间当中两直线垂直，其中一条直线为侧平线，那么它们的侧面投影互相垂直。

A. 对
B. 错

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B. method overloading
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