I can't finsh doing it _____ your help. 发布时间:2017-06-12 01:00 │ 来源:www.tikuol.com 题型:选择题 问题: I can't finsh doing it _____ your help. [ ]A. with B. and C. without D. by
题型:选择题 用焊料焊接对焊件的接触面形式和缝隙的大小叙述错误的是A.要求焊件成面接触,而不是点接触B.要求焊件成点接触,而不是面接触C.相接的面清洁而有一定的粗糙度D.缝隙小而不过紧E.缝隙一般以0.1~0.15mm为宜 查看答案