岗位作业应具备哪些知识？
参考答案：
岗位主要作业操作知识、作业过程中的风险控制措施和可能导致的事故，突发事件的应急行动和其它HSE应知应会知识等。
Today's weather isn't as it was yesterday, _____? [ ]
A. wasn't it
B. is it
C. was it
D. isn't it
What time does our plane leave?（）
A.Saturday.
B.Eight o'clock in the morning
C.Last week.
D.This week
