可用于治疗禽霍乱的药有（）。
A、青霉素G
B、林可霉素
C、环丙沙星
D、呋喃呾啶
参考答案：C
— Stay a bit longer, please. It's been such _____ fun having you here.
— Thank you, but I've got _____ early start tomorrow morning. [ ]
A. /; the
B. a; an
C. /;an
D. the; an
男性，70岁，烦躁失眠，吵闹不安，继而嗜睡。血气分析：pH7.30，PaCO277mmHg，PaO259mmHg。治疗宜用
A．尼可刹米
B．吗啡
C．碳酸氢钠
D．吸氧浓度50%
