选择题:乙酸乙酯的同分异构体中,能与饱和碳酸氢钠溶液反应生成气体的化合物的结构简式为________、________。

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题目内容:

乙酸乙酯的同分异构体中,能与饱和碳酸氢钠溶液反应生成气体的化合物的结构简式为________、________。

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如图,一理想变压器原线圈接稳压交变电源,副线圈接电阻R0和滑动变阻器R,原、副线圈电路中分别接有理想电流表A和理想电压表V。现闭合开关,滑动头P从a端向b端移动,则()

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