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当前学科：高级食品检验工
题目：
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某一元醇A10克与乙酸反应生成乙酸某酯11.2克，回收未反应的A1.8克，则A的分子量与下列数值最接近的是（）。
A . 98
B . 116
C . 158
D . 278
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