选择题:If such a work is hundreds or thousands of years o

题目内容:
If such a work is hundreds or thousands of years old and is still admired, there is probably something to it.

A. A. If a work was brought out hundreds or thousands of years ago and is still admired, ther
B. B. If a work was brought out hundreds or thousands of years ago and is still admired, ther
C. If a work was brought out hundreds or thousands of years ago and is still admired, there i
D. If a work was brought out hundreds or thousands of years ago and is still admired, there i
参考答案:

正投影法是指

正投影法是指A 投射线都相交于投射中心,投射出形体投影的方法B 投射线互相平行且垂直于投影面,投射出形体投影的方法C 由互相平行的投射线投射出形体投影的方法D

查看答案