井控装备的安装高度取决于()的安装高度。A、钻井四通 B、表层套管头 C、井口套管 D、防 发布时间:2018-09-05 23:38 │ 来源:www.tikuol.com 题型:单项选择题 问题: 井控装备的安装高度取决于()的安装高度。A、钻井四通B、表层套管头C、井口套管D、防喷管汇
题型:单项选择题 ________ a precious diamond necklace for his wife, Martin could hardly afford a tie for himself.A.Having boughtB.BuyingC.Being boughtD.To buy 查看答案
题型:单项选择题 It’s too bad that I failed in the math exam. If only I ______ hard at it!A.workedB.had workedC.has workedD.would work 查看答案