哪些患者应慎用人工鼻（）
A、气道分泌物多且黏稠
B、高血压
C、脱水
D、低温
E、肺部疾病引起的分泌物潴留
参考答案：A, C, D, E
We were told that Mr Green _____ the office for a few minutes when we arrived.
A．has been away from
B．had left
C．had been away from
D．has left
酒产品主要来源于容器、管道的有毒物质是（）
A.甲醇
B.杂醇油
C.醛类
D.氰苷
E.铅
