第一章测试1.
What does a thick line represent in drawing?
A:represent symmetrical line B:represent visible line C:represent invisible line D:represent hatching line
答案:B
2.
The possible direction of a dimension text should towards?
A:upper B:down C:right D:left
答案:AD
3.
The "R" and "∅ " means radius and diameter.
A:对 B:错
答案:A
4.
The main contents of title block are:
A:signature B:student ID NO. C:part name D:class
答案:ABCD
5.
The elements of the dimension
A: text B: arrow head C: dimension line D: extension line
答案:ABCD
6.
Thin dashed dotted line to indicate axis line ,symmetrical center lines.
A:错 B:对
答案:B
7.
Continuous thin irregular line to indicate part sectional boundary lines or to terminate a part view, and for short break line.
A:对 B:错
答案:A
8.
Thick dashed line shown can be made surface-treatment
A:错 B:对
答案:B
9.
A compass is used to draw circles and arcs
A:对 B:错
答案:A
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