A.鏡像對(duì)稱(chēng)B.點(diǎn)狀對(duì)稱(chēng)C.上下對(duì)稱(chēng)D.面部中線(xiàn)對(duì)稱(chēng)
A.中切牙B.側(cè)切牙C.尖牙D.以上都對(duì)
A.切1/3B.中1/3C.頸1/3D.切2/3