第二章 单元测试

1、单选题：
Which coordinates are related to H projection of a point?
选项：
A:x,y
B:x,z
C:y,z
D:x,y,z
答案: 【x,y】

2、单选题：
How can you represent V projection of a point?

选项：
A:a'
B:a
C:A
D:a''
答案: 【a'】

3、单选题：
Which projection accumulates as a point for a H perpendicular line?
选项：
A:V
B:W
C:H
D:no projection accumulates as a point
答案: 【H】

4、单选题：
Which projection is the true length for a frontal line?
选项：
A:H projection
B:V projection
C:W projection
D:no projection
答案: 【V projection】

5、单选题：
How many types of parallel line are there relative to projection plane?
选项：
A:1
B:2
C:3
D:4
答案: 【3】

6、多选题：
How many relationships between two lines?
选项：
A:1
B:2
C:3
D:4
答案: 【3;4】

7、判断题：
If two projections of two lines are parallel, then the two lines are parallel in space
选项：
A:对
B:错
答案: 【错】

8、判断题：
The true length projection of a line appears in a projection plane that is parallel to the line
选项：
A:对
B:错
答案: 【对】

9、判断题：
Two lines are parallel in space provided that their respective projections on two projection planes are parallel.
选项：
A:对
B:错
答案: 【对】

10、判断题：
If a line is parallel to any line in a plane, the line is parallel to the plane.
选项：
A:对
B:错
答案: 【对】