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【单选题】
臭氧层是地球的保护伞，NO气体破坏臭氧层时会发生O 3 +NO→NO 2 +O 2 的反应，该反应中的氧化剂是 [ ]A.
O 3
B.
NO
C.
NO 2
D.
O 2
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【简答题】“东风夜放花千树。更吹落、星如雨。”的赏析
【简答题】The meaning of the word “volunteer ” may be a little different in different countries, but it usually means “one who offers his or her services（服务）.” there are many different ways in which people can ...
【简答题】“东风夜放花千树。更吹落,星如雨”
【单选题】The quickest way to establish a communicative bond with a group of listeners is usually to ()
A.
Introduce a visual aid.
B.
Relate a personal anecdote.
C.
Ask a pointed, relevant question.
D.
Establish eye contact.
【单选题】Double Income and No Kids (DINK) becomes fashionable in China. The DINK couples are usually regarded as those who have higher educations and【B1】careers with higher incomes. The increase in DINK famili...
A.
stable
B.
available
C.
achievable
D.
liable
【单选题】The.school year in America usuall begins in September and continues until .
A.
July
B.
June
C.
August
D.
May
【简答题】“东风夜放花千树,更吹落,星如雨”一句用的修辞是
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