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【多选题】
轨迹交叉理论认为人的因素运动轨迹与物的因素运动轨迹的交叉点就是事故发生的时间和空间，通过避免人与物两种因素运动轨迹交叉，即避免（ ）同时、同地出现，来预防事故的发生。A.
安全管理上缺陷
B.
人的不安全行为
C.
设计上的缺陷
D.
物的不安全状态
E.
作业场所环境上的缺陷
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【简答题】When you cough or sneeze, you’d better turn your head away from others and cover your mouth with the full part of your hand. And then, you should say, “Excuse me.” This seems so , but it is surp...
【单选题】听力原文：M: How did you like yesterday's astronomy class? W: It was interesting. But the point she was trying to make seemed a little far-fetched. M: Oh, that new theory that ocean water came from comets?...
A.
The effect of the atmosphere on rainfall.
B.
How conditions on Earth support life.
C.
How water originated on Earth.
D.
A new estimate of the age of Earth.
【单选题】You ought to write a“T” true in front of the statement． Each mistake that you make you’ ll lose one point．
A.
with：In
B.
for：For
C.
by；With
D.
on；By
【单选题】听力原文：M: How did you like yesterday's astronomy class? W: It was interesting. But the point she was trying to make seemed a little far-fetched. M: Oh, that new theory that ocean water came from comets?...
A.
The effect of the atmosphere on rainfall.
B.
How conditions on earth support life.
C.
How water originated on earth.
D.
A new estimate of the age of earth.
【简答题】When you cough or sneeze, you’d better turn your head away from others and cover your mouth with the full part of your hand. And then, you should say, “Excuse me.” This seems so , but it is surp...
【简答题】输入继电器用 字母表示。
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