A.不對(duì)稱(chēng) B.對(duì)稱(chēng) C.不一定對(duì)稱(chēng) D.完全相等
A. B. C.1 D.不確定
A.|ZA|=|ZB|=|ZC| B.φA=φB=φC C.ZA=ZB=ZC D.|φA|=|φB|=|φC|