甲醇合成单元设备交出前，氮气置换合格的指标是（）。A、甲醇含_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题单项选择题

甲醇合成单元设备交出前，氮气置换合格的指标是（）。

A、甲醇含量小于0.5％

B、甲醇含量小于0.05％

C、甲醇含量小于0.005％

D、甲醇含量小于0.0005％

答案

参考答案：A

选择题

He was ill in hospital. His teacher looked after him _______. [ ]

A. as good as possible

B. as well as possible

C. as soon as possible

D. as well as he can

单项选择题

适用于访问共享信息及相关信息的软件是（）。

A.电子表格

B.数据库

C.软件包

D.管理信息系统