题型:判断题 It is obvious to the students ________ they should get well prepared for their future.[ ]A. as B. which C. whether D. that 查看答案
题型:判断题 欠平衡钻井中的欠平衡压力值是由()、井口回压所确定。A、井底压力PB、钻井液静液压力Pm、环空压耗PAp;B、地层压力PP、立管压力PA、环空压耗PAp;C、地层压力PP、钻井液静液压力Pm、环空压耗PAp。 查看答案