题目内容

If a cylinder is cut by a plane oblique with the axis ,the shape of the intersection ine should be a

A. ellipse
B. circle
C. rectangle
D. triangle

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The side edges of a cylinder is

A. parallel
B. intersect
C. on a plane
D. alignment

Which line is used to draw the imaginary line

A. Dould dashed dotted line
B. Dashed line
C. Thin line
Dashed line

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