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【多选题】
关于平面与平面相交的作图问题,说法正确的有()。A.
平面与平面相交产生的交线为直线，交线是平面与平面的共有线。
B.
在作图时要作出交线的投影。
C.
要根据遮挡情况，判断平面在各投影中的可见性。
D.
两个平面的可见轮廓用粗实线绘制，不可见轮廓用虚线绘制。
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