线路的停、送电均应按照_____或_____的指令执行。
参考答案:值班调度员;线路工作许可人
Generally speaking, employers should not _____ themselves in the private matters of their staff.
A.remind
B.inform
C.understand
D.involve
如何理解曹操《短歌行》中对人生无常的感叹和思贤若渴的愿望?