X线中不被显示的结石是() A.碳酸钙结石 B.草酸钙结石 C.尿酸结石 D.磷酸钙 发布时间:2017-08-31 09:41 │ 来源:www.tikuol.com 题型:单项选择题 问题: X线中不被显示的结石是()A.碳酸钙结石B.草酸钙结石C.尿酸结石D.磷酸钙结石E.磷酸镁铵结石
题型:单项选择题 按GB3323—87规定,满足扩大评定区条件的圆形缺陷,应该这样评定()。A、沿焊缝方向,评定区可以向左也可以向右平行扩大3倍且保证扩大后的评定区处于缺陷较严重的部位B、求出缺陷的总点数,用此值的1/3进行评定C、如果扩大后的评定区内还包含有条状夹渣或未焊透,则需要综合评级D、以上都是 查看答案
题型:单项选择题 — How far apart do they live?— ________I know, they live in the same neighbourhood. [ ]A. As long as B. As far asC. As well as D. As often as 查看答案