以下哪些是咸味药的作用（）。
A.收敛
B.泻下
C.利湿
D.补益
E.软坚
参考答案：B, E
Living in the central American desert has its problems, ________ obtaining water is not the least .
A．of which
B．for what
C．as
D．whose
慢性咳嗽伴大量脓痰多见于
A．上呼吸道感染
B．支气管哮喘
C．支气管内膜结核
D．支气管扩张
E．支气管肿瘤
