题目内容

下列化合物可以作为酰基化试剂的是

A. 乙酰氯
B. 乙酸酐
C. 乙酰胺
D. 乙酸乙酯

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the first model for arguing is called (1) _____:

-- it is a (2) _____ model for arguing

-- warranted (3) _____

-- no (4) _____ in the adversarial sense

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