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【单选题】
在离地面20~25 公里的平流层内,有一层臭氧气体。臭氧层的作用是?A.
防止地球气温变暖
B.
控制酸雨形成
C.
阻挡太阳“紫外线辐射”
D.
控制大气平衡
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皮皮学刷刷变学霸
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【简答题】The moose-crossing sign is to warn drivers to ____________ of moose while driving.
【简答题】The report 'Surfer Beware III' insisted that______.
【单选题】The moose turned suddenly and( )straight into the dog team.
A.
traveled
B.
changed
C.
charged
D.
chained
【多选题】B: P: Yes, I’d like to claim my luggage registered from Xi’an. B: P: Train T 42. B: P: Here you are. B: P: But they told me my luggage would be transported on the same train I took. B: P: All right. 1...
A.
3
B.
2
C.
4
D.
1
E.
5
【简答题】beware
【简答题】听下面一段对话，完成第1至4题。 1. How did the woman travel to London? A. By plane. B. By train. C. By bus. 2. Where did the man speaker have lunch in London? A. In the hotel restaurant. B. In his friend's house. C....
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