若接班人员未到，交班人员向接班值长报告后，即可离开岗位。
参考答案：错
I guess we've already talked about this before but I'll ask you again just ____. [ ]
A. by nature
B. in return
C. in case
D. by chance
离心式压缩机的转子主要有（）。
A、叶轮，主轴
B、平衡盘，推力盘
C、扩压器，弯道
D、止推轴承，径向轴承
