病理生理学研究疾病的最主要方法是（）。
A.临床观察
B.动物实验
C.疾病的流行病学研究
D.疾病的分子和基因诊断
参考答案：B
通常成人每日不显性失水约
A．350 ml
B．500 ml
C．850 ml
D．1 000 ml
E．1 200 m1
I saw him, but he didn't see me, ? [ ]
A. didn't I
B. did he
C. did I
D. didn't he
