口腔上皮不包括（）。
A.角化层
B.粒层
C.棘细胞层
D.颗粒层
E.基底层
参考答案：D
______ is obvious ______he has finished his work.
A．What; that
B．That; that
C．It; that
D．It; what
直招士官是否享受学费补偿？
