单项选择题
以一初始事件为起点,按照事故的发展顺序,一步一步地进行分析,每一事件可能的后续事件只能取完全对立的两种状态之一的原则,逐步向结果方面发展,
直到达到系统故障或事故为止的分析方法为()。
A.事件数分析法
B.事故树分析法
C.安全检查表法
D.预先危险性分析法
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单项选择题
听力原文:M: I heard Helen's going to college. What's she studying?W: She's taking courses in statistics, economics and accounting.Q: What career does Helen probably plan to follow?(18)A.Secretary.B.Business administration.C.Home economics.D.Biology.
A.
Q:
B.Secretary.
B.Business
C.
C.Home
D.
D.Biology.
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单项选择题
A.Workers on assembly lines.B.Government officials.C.Business people.D.College students.
A.Workers
B.
B.Government
C.
C.Business
D.
D.College
E.
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