Peter ________ up at six o'clock every morning. [ ]
A. gets
B. get
C. is getting
答案:A
膜的流动性的生理意义何在?
时复症的主要特征是:()
A.白睛红赤
B.白睛混赤
C.碜涩不适
D.痒若虫行
E.畏光流泪