第一章 单元测试
1、多选题：
According to national standard, which of the following are preferred scales?
选项：
A:3：1
B:4：1
C:2：1
D:5：1
答案: 【2：1;5：1】
2、多选题：
Which of the following heights are provided in national standards?
选项：
A:3
B:7
C:5
D:10
答案: 【7;5;10】
3、判断题：
The symbol "GB/T 14689-2008" denotes that the concern national standard is compulsory.
选项：
A:错
B:对
答案: 【错】
4、判断题：
When we make a drawing, a frame should be drawn inside of the outmost edges of the drawing sheet. There are two styles of drawing sheet layout: with a filling margin and without a filling margin.
选项：
A:对
B:错
答案: 【对】
5、单选题：
Which of the following lines are used as dimension lines, extension lines, leader lines, construction lines, section lines and projection lines?
选项：
A:Wavy lines
B:Thin solid lines
C:Thin phantom lines
D:Thin center lines
答案: 【Thin solid lines】
第二章 单元测试
1、多选题：
Which of the following are the projection rules of the projections of points？
选项：
A:The frontal projection and the profile projection of the same point should be aligned horizontally.
B:The frontal projection and the horizontal projection of the same point should be aligned vertically.
C:The horizontal projection and the profile projection of the same point have the same width coordinate.
答案: 【The frontal projection and the profile projection of the same point should be aligned horizontally.;The frontal projection and the horizontal projection of the same point should be aligned vertically.;The horizontal projection and the profile projection of the same point have the same width coordinate.】
2、多选题：
What are the projection properties of frontal line?
选项：
A:The angle between the frontal projection and axis OX equals the angle of the spacial line and the horizontal plane of projection.
B:The horizontal projection is parallel to axis OX.
C:The profile projection is parallel to axis OZ.
D:The frontal projection gives the true size.
答案: 【The angle between the frontal projection and axis OX equals the angle of the spacial line and the horizontal plane of projection.;The horizontal projection is parallel to axis OX.;The profile projection is parallel to axis OZ.;The frontal projection gives the true size.】
3、判断题：
If a line is an oblique line, the projections of the line will be foreshortened lines in the three planes of projections.
选项：
A:对
B:错
答案: 【对】
4、判断题：
The connecting line between the spacial point and its horizontal projection reflects the distance of the point to the horizontal plane of projection, and it equals the coordinate X of the point.
选项：
A:对
B:错
答案: 【错】
5、判断题：
According to the difference of X coordinates of the two points, we can tell the relative position of these two points in front-rear direction.
选项：
A:错
B:对
答案: 【错】
