改性钻井完井液对钻屑的回收率大于90%,对岩心的渗透率恢复值大于(),才能用于钻开油气层。
A.85%
B.70%
C.60%
D.50%
参考答案:B
急性肾小球肾炎循环充血状态多发生于
A.1月内
B.3~5日
C.2周
D.1周
E.3周
It’s unfair that he _________ cheating because he’s a famous author.
A.makes use of
B.gets away with
C.gets rid of
D.ends up with