A.20~30mm B.30~40mm C.40~60mm D.50~60mm E.以上都不對(duì)
A.30mm B.30~39mm C.40mm D.>40mm E.>50mm
A.下頜下降 B.下頜前伸 C.下頜上升,切牙對(duì)刃 D.切牙對(duì)刃,并滑回至正中 E.下頜下降與前伸