研磨圆柱孔时,应控制研磨棒与零件孔的配合间隙,一般以用手推转研磨棒时感觉()为宜。 发布时间:2018-05-12 20:18 │ 来源:www.tikuol.com 题型:单项选择题 问题: 研磨圆柱孔时,应控制研磨棒与零件孔的配合间隙,一般以用手推转研磨棒时感觉()为宜。A.很紧B.很松C.不十分费力
题型:单项选择题 My teacher always ________ me to continue studying when I want to give it up. [ ]A. keeps B. encourages C. makes D. prevents 查看答案