(1)环状化合物A的相对分子质量为82,其中含碳87.80%,含氢12.2%。B的一氯代物仅有一种,B的结构简式为___

(1)环状化合物A的相对分子质量为82,其中含碳87.80%,含氢12.2%。B的一氯代物仅有一种,B的结构简式为__________.(2)M是B的一种同分异

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请回答  78  题答案

请回答  78  题答案

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For an American citizen on a 2-day tour of Canada,how much t

For an American citizen on a 2-day tour of Canada,how much tax does he have to p

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According to those against killing wolves,when wolves eat ot

According to those against killing wolves,when wolves eat other animals, .A.they

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请认真阅读下列短文,从短文后各题所给的A、B、C、D四个选项中,选出最佳选项,并在答题卡上将该项涂黑。回答56~59题A

请认真阅读下列短文,从短文后各题所给的A、B、C、D四个选项中,选出最佳选项,并在答题卡上将该项涂黑。回答56~59题AUsually, when your

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