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【多选题】
组合体看图时,为什么“几个视图要联系起来看”?()
A.
不同形状的物体可有一个相同的视图。仅仅根据一个视图一般不能唯一确定空间立体的形状，所以要几个视图联系起来看。
B.
组合体中的要用四个视图才能表达清楚，所以要几个视图联系起来看。
C.
不同形状的物体可有两个相同的视图。仅仅由两个视图有时也不能唯一的确定空间立体的形状，所以要几个视图联系起来看。
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