【单选题】气囊法适用于现场测定最大粒径小于( )mm的土的密度。
【单选题】—Is it true that Aaron refused an offer from Cambridge University yesterday? —Yeah, but I have no idea ______ he did it; that’s one of his favorite universities.
【单选题】—Is it true that Mike refused an offer from Yale University yesterday? --Yeah, but I have no idea __he did it, that’s one of his favourite universities.
【单选题】当一个人的收入增多,他花在一种商品上的收入份额减少,这种商品需求收入弹性( )。
【判断题】Z3050 摇臂钻床由于摇臂升降电动机采用的是短时工作制,因此不需要用热继电器进行过载保护。 ( )
【单选题】They were still living in Paris two years ago, but I have no idea where they ________ now.
【判断题】有一份批复的开头写道:“贵局X劳发〔2011〕32号请示收悉。”( )
【单选题】关于Z 3050 摇臂 钻床的各电机下列说法错误的是( )。
B.
在启动主轴电动机之前需先按下按钮SB2,接通摇臂钻床的控制线路总电源
D.
本钻床可实现摇臂的松开、升(或降)、夹紧这个过程的自动控制
【判断题】有一份批复的开头写道:“贵局×劳发〔××××〕32号请示收悉。”