泥浆护壁泥皮的厚度对()影响很大。 A.钻井速度 B.桩土间接触摩擦力 C.护筒埋设 发布时间:2018-08-29 07:59 │ 来源:www.tikuol.com 题型:单项选择题 问题: 泥浆护壁泥皮的厚度对()影响很大。A.钻井速度B.桩土间接触摩擦力C.护筒埋设D.抹钻渣时的排浆量
题型:单项选择题 About 187 passengers were reported _____ the shipwreck which happened last month.A.to have been survivedB.having survived C.to have survivedD.to survive 查看答案