55.下列何種口腔黏膜,其下方無黏膜下層(submucosa)?
(A)頰黏膜
(B)唇黏膜
(C)口底黏膜
(D)牙齦

答案:登入後查看
統計: A(6), B(6), C(34), D(304), E(0) #2237858