Which line is used to draw the imaginary line
A. Dould dashed dotted line
B. Dashed line
C. Thin line
Dashed line
查看答案
The size of A3 sheet is
A. 594⌧841
B. 210⌧297
C. 420⌧594
D. 297⌧420
When the length of a object is 1000mm,The drawing scale is 1:20 ,then the size we draw on the sheet should be
A. 100
B. 1000
C. 50
D. 20
Which one is not a basic solid
A. stairs
B. cyinder
C. prism
D. pyramid
The purpose of thin dashed dotted line is to
A. Represents an imaginary outline
B. Represents the visible outline
C. Represents invisible outline
D. Center line or axis
微信支付 
支付宝支付