下列哪些不是痰饮病的常见病因（）
A.外感寒湿
B.饮食所伤
C.情志失调
D.劳欲所伤
E.久病体虚，年高体弱
参考答案：C
We should not ________ and laugh at those who have no homes to shelter from the rain and wind.
Instead, we should be sympathetic of them.[ ]
A. look forward to
B. think highly of
C. pay attention to
D. look down upon
对血液起滤过作用的结构是
A．肾小球
B．肾单位
C．肾小管
D．肾小囊
