支气管哮喘急性发作患者血气分析PaCO2增高提示（）
A.出现呼吸性碱中毒
B.病情好转
C.病情恶化
D.没有临床意义
E.出现心衰
参考答案：C
Those smoke should go to the next room. [ ]
A. whom
B. who
C. which
D. whether
Our foreign trade policy is based（）equality nad mutual benefit.
