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【简答题】
设a，b，c是三条不同直线，α，β，γ是三个不同平面，给出下列命题： ①若α⊥γ，β⊥γ，则α ∥ β； ②若a，b异面，a?α，b?β，a ∥ β，b ∥ α，则α ∥ β．； ③若α∩β=a，φ∩γ=b，γ∩a=c，且a ∥ b，则c ∥ β； ④若a，b为异面直线，a ∥ α，b ∥ α，c⊥a，c⊥b，则c⊥α 其中正确的命题是______．
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A.
风险源
B.
风险因素
C.
风险事件
D.
损失
【单选题】海因里希把工业伤害事故的发生、发展过程描述为具有一定因果关系的事件的连锁发生过程。请问在风险管理中,这种过程我们称为
A.
风险因素
B.
风险事件
C.
损失
D.
风险链
【判断题】In 1945, Fleming, Chain and Florey were awarded the Nobel Prize in Medicine for the discovery of penicillin.
A.
正确
B.
错误
【简答题】In England, people often talk about the weather because they can experience (经历) several seasons in one day. In the morning the weather is warm just like in spring. An hour later black clouds come and...
【单选题】Which is not a change in modern society in the US according to the writer of the second passage?
A.
Women’s traditional roles.
B.
The living standards.
C.
The home environment.
D.
The insights into space.
【单选题】Every time_____ they met, they would talk several hours together about all of the situations_____ appear in the working world. [ ]
A.
that; when
B.
when; where
C.
which;what
D.
/; that
【简答题】The students ___________ several small groups to talk about the subject.
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