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【简答题】
CO2is the only greenhouse gas that will trap the Sun’s radiation within the troposphere.
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参考解析：
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【单选题】Which of the following historic events is of little significance to America
A.
World War Ⅱ
B.
The Glorious Revolution.
C.
Boston Tea Party.
D.
E.
D. The Vietnam War.
【单选题】Individuals in every culture have similar basic needs but express them differently. In daily life we all initiate (开始) conversation, use of formal and informal speech, give praise, express disagreemen...
A.
share common needs but express them differently
B.
share common needs and therefore express them similarly
C.
don’t share common needs and therefore do not have similar expressions
D.
don’t have common needs but express them similarly