食管癌切除术后出现吻合口瘘多在术后（） A.1～3天 B.4～8天 C.5～10天

投诉率呈（）趋势，表示卷烟企业的服务质量处于很不稳定状况，时好时坏。

A、下降

B、平稳

C、上升

D、波浪状

A．Legalizing drugs would be considered unconstitutional.

B．Decriminalizing drugs would be a surrender in a drug war that has not really even begun.

C．The black market would not really disappear with the legalization of drugs.

D．Legalization would lead to an increase in violent crime and child abuse.

无菌纱条填塞官腔止血时：

A．36小时取出
B．24小时取出
C．12小时取出
D．8小时取出
E．16小时取出

建立旅游企业战略联盟应注意哪几个方面？