一般机器基本上都是由()等三部分组成。
A.主机、燃料、传动
B.原动、燃料、传动
C.原动、工作、传动
D.主机、附件、工作
参考答案:C
________ more energy to my study instead of being crazy about Internet games, I would be sitting in a comfortable office now.
A.If I devoted
B.Had I devoted
C.Would I be devoted
D.Should I be devoted
钎焊从业人员不应具有以下责任()。
A、丰富安全生产知识
B、责任意识
C、不用注意提高安全意识