钻孔时,注入切屑液的目的是以()为主。 A.润滑 B.清洗 C.冷却 D.防锈 发布时间:2017-08-27 21:49 │ 来源:www.tikuol.com 题型:单项选择题 问题: 钻孔时,注入切屑液的目的是以()为主。A.润滑B.清洗C.冷却D.防锈
题型:单项选择题 —I want _______ a British pen friend. —Good idea. I think it's good for your English. [ ]A. make B. made C. to make D. making 查看答案
题型:单项选择题 Hardly ____ the airport when the plane took off.A.I had arrived at B.had I arrivedC.had I reached D.I had got to 查看答案