实习学员由教员带飞满()小时后方可申请放飞。
参考答案:100
My brother _____ glasses. [ ]
A. isn't wear
B. don't wear
C. doesn't wear
D. doesn't wears
井液在井眼中停泵一段时间后,当再循环时常见到油气水侵,()是正确的。
A.油气水重力置换和扩散进入钻井液
B.油气水在压差的作用下进入钻井液
C.与停泵时间有关
D.与停泵时间无关
E.与储层特性有关