鉴别织物成分是真丝还是人造丝,正确的操作方法是( )  A.滴加

鉴别织物成分是真丝还是人造丝,正确的操作方法是(  )

 A.滴加醋酸         B.滴加浓硫酸         C.滴加酒精           D.灼烧

答案

D

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