射线检测法适用于检验的缺陷是()。
A.锻钢件中的折叠
B.铸件金属中的气孔
C.金属板材中的分层
D.金属焊缝中的夹渣
E.b和d
参考答案:E
— It shouldn’t take long to clear up after the party if we all volunteer to help.
— That’s right. __________.
A.Many hands make light work
B.Something is better than nothing
C.The more the merrier
D.The sooner begun, the sooner done
钢材的成品外观检验包括哪些内容?