无泵反循环钻进适用于()孔深。A.任意 B.500m以内 C.150一200m以内 发布时间:2019-07-27 20:43 │ 来源:www.tikuol.com 题型:单项选择题 问题: 无泵反循环钻进适用于()孔深。A.任意B.500m以内C.150一200m以内
题型:单项选择题 下面四幅气候要素图与对应城市排列正确的是( )A.北京—①上海—②吐鲁番—③西双版纳—④ B.上海—①西双版纳—②吐鲁番—③北京—④C.西双版纳—①上海—②北京—③吐鲁番—④D.北京—①上海—②西双版纳—③吐鲁番—④ 查看答案
题型:单项选择题 He was late for the meeting because the bus he took _____ halfway. [ ]A. broke in B. broke down C. broke out D. broke up 查看答案