A.破口B.空洞C.內(nèi)凹原始晶面D.裂隙
A.順時(shí)針轉(zhuǎn)90度B.逆時(shí)針轉(zhuǎn)90度C.順時(shí)針轉(zhuǎn)180度D.逆時(shí)針轉(zhuǎn)180度
A.上下對(duì)稱排列B.左右對(duì)稱排列C.前后對(duì)稱排列D.正反對(duì)稱排列