I like this music. Who's it______?[ ] A._爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题选择题

I like this music. Who's it______? [ ]

A. in

B. by

C. on

答案

B

问答题简答题

计算题：某锅炉正常运行时总通风量Q=84300m³/h，求其点火前炉膛吹扫时的通风量最少应是多少？

单项选择题

氯化物检查法中，50ml溶液中

A．0.002mg
B．0.01～0.02mg
C．0.01～0.05mg
D．0.05～0.08mg
E．0.1～0.5mg