在用工程师法循环气体溢流出井时,下列情况将引起井底压力如何变化?
如果在重钻井液上返时保持立压不变()
A、升高
B、降低
C、保持不变
参考答案:C
With no better way to express feelings of love and , it’s easy to see why everyone turns to the flower shop on Mothers’ Day.
A.appreciation
B.inspiration
C.satisfaction
D.ambition
脑梗死CT水肿高峰发生于发病后()
A.12小时
B.24小时
C.2~5天
D.1周
E.10天左右