蜡油加氢裂化装置用于浸泡反应器的碱液总浓度为()。
A、1%
B、1.5%
C、2%
D、2.5%
参考答案:A
—— Why are you lying in bed?
—— A __________ walk __________ me completely tired.
A.two-hours; made
B.two hour’s; has made
C.two-hour; has made
D.two-hours’; made
我国公民的国防义务有以下几个方面的内容()。
A、履行服兵役
B、接受国防教育
C、保护国防设施
D、保守国防秘密