The “ultimate cure” for stage fright, according to this week’s lectures, is ____（）
A. Preparation
B. Active gestures
C. Deep breathing
D. Focusing on what you’re sharing
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What kind of line type is used to represent circle central lines（）
A. Thin centerline
B. Thick continuous line
C. Thin continuous line
D. Thin hidden line
Thin continuous line is used to represent（）
A. Dimension line
B. Extension line
Centerline
D. Invisible outlines
What kind of line types are used to represent invisible outlines（）
A. Thin hidden line
B. Continuous thick line
Continuous thin line
D. Thin centerline
In plane figure, what kind of line type is used to show the symmetric line（）
A. Thin centerline
B. Thick hidden line
C. Thin phantom line
D. Thin break line
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