考虑检测灵敏度补偿的理由是:() A.被检工件厚度太大 B.耦合剂有较大声能损耗 发布时间:2017-09-09 00:21 │ 来源:www.tikuol.com 题型:单项选择题 问题: 考虑检测灵敏度补偿的理由是:()A.被检工件厚度太大 B.耦合剂有较大声能损耗 C.工件与试块材质、表面粗糙度有差异 D.工件底面与检测面不平行
题型:单项选择题 This kind of machine___________ making a kind of special paper for newspaper.[ ]A. use for B. used for C. is used for D. are use to 查看答案