题目内容

If the cutting plane of a cone paasing through the vertest, the intersection line should be

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

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Which one is not a basic solid

A. belcony
B. cylinder
C. cone
D. sphere

If the cutting plane of a cone passing through the vertest, the intersection line should be a

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

The relasionship of the axis and element on the sylinder is

A. Parallel
B. Intersect
C. Screw
D. virtical

The relasionship of the axis and element on the cone is

A. Intersect
B. Parallel
C. Srew
D. virtical