Y341型水井封隔器解封:上提油管,卸下油管挂,接()m油管短节,下放管柱,即可实现封隔器的解封。
A、1~3
B、3~5
C、5~7
D、7~9
参考答案:B
—Why don't we just leave it until tomorrow?
—________ I'm dead tired today.
A.Forget it.
B.I couldn't agree more.
C.It all depends.
D.Don't mention it.
互联网的先进的网络浏览和服务器()
A.会使变化不定的且存在差异的价格水平趋于一致
B.对变化不定的且存在差异的价格策略不会有任何影响
C.对价格策略的影响是暖昧、不清晰的
D.与价格策略的应用毫无关系