What kind of line type can be used to show projection lines（）
A. Thin continuous line
B. Thick continuous line
C. Thin hidden line
D. Thin centerline
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What kind of engineering drawing has the best visuality（）
A. Perspective projection
B. Multi-view projection
Cartographical projection
D. None
What kind of line type can be used to show projection axes（）
A. Thin continuous line
B. Thick continuous line
C. Thin hidden line
D. Thin centerline
About the first angle projection, what is the correct description（）
A. The spatial object is between the projection center and the projection plane
B. The projection center is between the spatial object and the projection plane
C. The projection plane is between the projection center and the spatial object
D. None
What kind of engineering drawing has good measurability（）
A. Multi-view projection
B. Cartographical projection
C. Perspective projection
D. Axonometric projection
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