Which is the verb of participation?
A. participate
B. participating
C. participant
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Which is the noun of speak?
A. speaking
B. spoken
C. speaker
What’s the adjective of profession?
A. professional
B. professor
C. proverb
两点透视有两个消失点,物体与画面呈一定的角度,故也称为“成角透视”
两点透视除垂直线外,物体各个面的各条平行线向两个方向消失在视平线上