气井以油管生产时,套压比油压大几兆帕说明什么问题? 发布时间:2017-10-16 16:14 │ 来源:www.tikuol.com 题型:问答题 简答题 问题: 气井以油管生产时,套压比油压大几兆帕说明什么问题?
题型:问答题 简答题 He was educated at a local grammar school,___he went on to Cambridge. [ ]A. from which B. after that C. after which D. from this 查看答案