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【多选题】
下列描述正确的是?A.
根据投射线之间是否相互平行，我们可以将投影分为中心投影和平行投影。
B.
根据投射线与投影面是否垂直，平行投影又可分为斜投影和正投影
C.
正轴测投影、多面正投影和标高投影都属于正投影
D.
透视图是中心投影法得到的图种
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A.
causing
B.
to be
C.
be caused
D.
caused
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