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【简答题】
H2O2分子中O—O键级为________________，O2分子中O—O键级为________________，分子中O—O键级为________________。
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举一反三
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【简答题】第二节：书面表达（满分25分） Read this letter and imagine you are the adviser who deals with students’ problems. Write a letter in100-150 words to give Xiaolei some helpful advice. Dear…, Can you help me, please? ...
【简答题】The letter passed from one to another until everyone ______ (read)it.
【简答题】呆账核销基本流程包括?
【简答题】Read the following letter then write a reply letter. Dear Sirs, The Chamber of Commerce of your city has recommended you as one of the leading importers of Chinese electronic machinery． We are, theref...
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