兼有消肿生肌之效的活血祛瘀药有( )
A．白芷、丹参
B．煅石膏、牡丹皮
C．乳香、没药
D．桃仁、红花
E．三棱、莪术
参考答案：C
经检查决定剖腹手术，术前准备中最关键的措施是
A．禁食
B．插胃管，胃肠减压
C．半卧位
D．应用抗生素
E．补液，输血
Ladies and gentlemen，please fasten your seat belts．The plane ．
A．takes off
B．took off
C．is taking off
D．has taken off
