呼吸停止的急救措施是（）。
A．人工呼吸
B．清理呼吸道
C．胸外按压心脏
D．开胸按压心脏
E．给氧
参考答案：A
—The supermarket _________ at 9 a.m. and it __________ at 9 p.m. every day.
—So I have to go there before 9 p.m. [ ]
A. open; close
B. opens; closed
C. opens; closes
D. open; closed
下列何药对铜绿假单胞菌感染有效：
A．氨苄西林
B．氯唑西林
C．替卡西林
D．头孢拉啶
E．青霉素V
