【判断题】一般用洛氏硬度机而不用布氏硬度机检测淬火钢成品工件硬度
【单选题】放渣、出铁的渣、铁罐不准放满,上面应留()毫米。
【单选题】放渣、出铁的渣、铁罐不准放满,上面应留足()毫米。
【单选题】— Why did you drop the chance of earning big money? —______. You know, I don't want to get rich by taking risks. [ ]
A.
All is well t hat ends well
B.
One man's meat is another's poison
C.
Better safe than sorry
D.
No sweet without sweat
【单选题】供应商调查可以分成三种:资源市场分析、供应商初步调查和 ( )
【判断题】一般用洛氏硬度机而不用布氏硬度机来检测淬火钢成品工件的硬度