下列有机物分子中,既含有醛基又含有羟基的是()

下列有机物分子中,既含有醛基又含有羟基的是()

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将氨气通过NaClO碱性溶液可以制得N2H4(肼),反应的化学方程式如下:NaClO+2NH3=NaCl+H2O+N2H4现将112L氨气(标况)通入1L 2m

将氨气通过NaClO碱性溶液可以制得N2H4(肼),反应的化学方程式如下:NaClO+2NH3=NaCl+H2O+N2H4现将112L氨气(标况)通入1L 2mol/LNaClO的碱性溶液,最多能制得

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老吴从家里出发乘车到银行办理业务,回城时步行,往返共用了45分钟。如果老吴往返都乘车,则只需花30分钟。那么,如果老吴往返时都选择步行,需要花( )分钟。

老吴从家里出发乘车到银行办理业务,回城时步行,往返共用了45分钟。如果老吴往返都乘车,则只需花30分钟。那么,如果老吴往返时都选择步行,需要花( )分钟。

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Pain is an emotional as well as physical response to injury or disease. Intense

Pain is an emotional as well as physical response to injury or disease. Intense fear and anxiety are

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______the result of the exam, she stood at the door of the classroom, disappoint

______the result of the exam, she stood at the door of the classroom, disappointed.

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