三大唾液腺中,下颌下腺分泌量约占总量的
A.45%
B.55%
C.65%
D.75%
E.85%
唾液腺黏液囊肿好发于
A.下唇和颌下腺
B.舌下腺和颌下腺
C.上唇和颌下腺
D.上唇和舌下腺
E.下唇和舌下腺