从业人员发现直接危及人身安全的紧急情况时,应当停止作业。
参考答案:对
Jenny ________ have kept her word. I wonder why she changed her mind.
A.must
B.should
C.need
D.would
用于电源和网络发展规划的负荷预测应为()
A.短期预测
B.超短期预测
C.中期预测
D.长期预测