【简答题】I know I should have told the head at the time. That was my real 36 . He had gone out of the study for some 37 , leaving me alone. In his absence I looked to see 38 was on his desk. In the 39 wa...
【简答题】料库中原材料或毛坯件的材料钢号为:Q255、Q345、45、40crNi、65Mn、QT600-02、5CrNiM0、Cr12MoV、W18Cr4v、1Cr18Ni9Ti、20CrMnTi、ZGMn13、60Si2Mn、T12。试填下表。 零 件 性能要求 选 材 最终热处理 使用态组织 机床传动齿轮 齿部表面较高硬度和耐磨性 汽车动力齿轮 齿部表面高硬度和疲劳强度,心部高强韧性 耐酸容器 耐酸性...
【单选题】Our grade held the grown-up ceremony on March, 21st, _____ I have been well aware of my responsibility for our society. [ ]
【简答题】缺词填空。 Halloween is my favourite festival. We have a special p 1 on October 31st. My friends and I always d 2 up at Halloween. We wear special costumes w 3 masks. Sometimes we p 4 our faces and people ...
【判断题】高层管理者激励的制度安排核心是将高层管理者对个人效用最大化的追求转化为对公司利润最大化的追求。
【单选题】下述药物治疗慢性阻塞性肺疾病的目的中,不正确的是()
【简答题】现有下列钢号:①Cr12MoV②W18Cr4V③5CrNiM0④60Si2Mn⑤ZGMn13⑥Q345⑦1Cr13⑧20CrMnTi⑨40Cr⑩1Cr18Ni9Ti。请按用途选择钢号: A.制造机床齿轮应选用( )材料B.制造汽车板簧应选用( )材料 C.制造桥梁应选用( )材料 D.制造耐酸容器应选用( )材料 E.制造高速车刀应选用( )材料 F.制造大尺寸...
【判断题】制造大截面重载荷零件,如曲轴等,可以一般用高淬透性的40CrNiM等。