肝脏手术麻醉应禁用下列哪种吸入麻醉药()
A．氟烷
B．恩氟烷
C．异氟烷
D．七氟烷
E．地氟烷
参考答案：A
术中如何判断绞窄性肠梗阻肠管的生机?如有可疑应如何处理?
The new assembly line having been adopted, the factory produced（）cars in as the year before.
A.as twice many
B.twice many as
C.twice as many
D.as many as twice
