1、单选题：
What does a thick line represent in drawing?
选项：
A:represent symmetrical line
B:represent hatching line
C:represent visible line
D:represent invisible line
答案: 【represent visible line】

2、多选题：
The possible direction of a dimension text should towards?
选项：
A:down
B:right
C:upper
D:left
答案: 【upper;
left】

3、判断题：
The "R" and "∅ " means radius and diameter.
选项：
A:错
B:对
答案: 【对】

4、多选题：
The main contents of title block are:
选项：
A:signature
B:student ID NO.
C:part name
D:class
答案: 【signature;
student ID NO.;
part name;
class】

5、多选题：
The elements of the dimension
选项：
A:dimension line
B:arrow head
C:extension line
D:text
答案: 【dimension line;
arrow head;
extension line;
text】

6、判断题：
Thin dashed dotted line to indicate axis line ,symmetrical center lines.
选项：
A:对
B:错
答案: 【对】

7、判断题：
Continuous thin irregular line to indicate part sectional boundary lines or to terminate a part view, and for short break line.
选项：
A:错
B:对
答案: 【对】

8、判断题：
Thick dashed line shown can be made surface-treatment
选项：
A:错
B:对
答案: 【对】

9、判断题：
A compass is used to draw circles and arcs
选项：
A:对
B:错
答案: 【对】