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【单选题】
干洁大气中，能够引起高层大气升温的成分为 。A.
臭氧
B.
水汽
C.
氧气
D.
二氧化碳
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【简答题】人教版三年级下册英语作业本Unit 1 4答案
【单选题】They required that all the necessary documents ______ to the president's office before the end of this month.
A.
be handed
B.
must be handed
C.
should hand in
D.
had been handed in
【简答题】Unit 4作业.docx
【单选题】All the President's Men______one of the important books for historians who study the Watergate scandal.
A.
remain
B.
remains
C.
remained
D.
is remaining
【简答题】人教版四年级下册英语作业本Unit 1 4答案
【单选题】How does the author feel about the President's request for the extension and its coverage?
A.
Short of vision.
B.
Late and incomplete.
C.
Lacking in consistency.
D.
Exhaustive but ineffective.
【简答题】根据给出的中文意思，写出单词：adj.电磁的
【简答题】adj.电磁的
【简答题】人教版四年级下册英语作业本Unit 2 4答案
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