A.鼻腔 B.口咽 C.莖突后間隙 D.咽后間隙 E.前顱凹
A.3000~4000cGy B.4000~5000cGy C.5000~6000cGy D.6000~7000cGy E.>7000cGy
A.50% B.40% C.80% D.40%~50% E.30%