_______ anyone call, please tell him I'm not free. [ ]
A. Must
B. Can
C. May
D. Should
答案:D
对全身水液代谢起主宰作用的是()
A.小肠之泌别清浊
B.肺之通调水道
C.脾之运化水液
D.肾之蒸腾气化
E.肝之疏泄功能
列车在停站时,乘客按压PECU报警的正确处理办法是什么?