题目内容

两直线交叉,在某一个投影面上的投影可能具有“交点”,该“交点”实际上是两直线的____。

查看答案

搜索结果不匹配？点我反馈

更多问题

平面可分为一般位置和特殊位置平面,特殊位置平面包括投影面平行面和投影面垂直面,投影面平行面的定义是与一个投影面平面,与另外两个投影面垂直的平面 ,包括水平面,,。水平面的投影在H面反映,在其他两个投影面的投影,且与相应的投影轴。投影面垂直面的定义是垂直于一个投影面,与另外两个投影面是倾斜的平面 , 包括正垂面,,。正垂面在V面投影,在两外两个投影面的投影。

查看答案

Choose the BEST answer based on your comprehension of the text

A. Mark Twin's two sides
B. Mark Twin's childhood
C. Mark Twin's personal life
D. Mark Twin's writing career

查看答案

2. Why is Mark Twain called "mirror of America"?

A. Because he enjoyed a great reputation.
Because he bore striking characteristics.
C. Because his description of America is reliable.
D. Because his experiences are well reflected in his works.

查看答案

3. What did Mark Twain used to be?

A reporter.
B. An officer.
C. A professor.
D. A broadcaster

查看答案