A.0~120° B.0~150° C.0~90° D.0~60°
A.20° B.30° C.60° D.90°
A.矩形波產(chǎn)生與移相 B.尖脈沖產(chǎn)生與移相 C.強觸發(fā)與輸出 D.三角波產(chǎn)生與移相