【单选题】20CrMnTi是最常用的合金渗碳钢,其最终热处理为 ( )
【单选题】Why Google can't claim victory?
A.
Google doesn't agree to certain conditions.
B.
The European Union needs to sign off on the merge.
C.
Google has raised concerns about consumer privacy.
D.
Google can't begin incorporating DoubleClick into it's business.
【判断题】极限偏差可为正、负或零值,而公差为正值。
【判断题】公差值 可为正、负或零值,而 极限偏差 只能为正值。
【单选题】Something is wrong with his camera. It can’t be _______ to take photos in cloudy conditions.
【单选题】He couldn’t _____ the terrible working conditions in the factory and decided to leave at once. [ ]
【单选题】20CrMnTi是常见的合金渗碳钢,其最终热处理为( )。
【单选题】汽车变速齿轮用20CrMnTi钢制造,其最终热处理是( )。