根据鞣质的化学结构特征可将其分为( )
A.二类
B.三类
C.四类
D.五类
E.以上都不对
参考答案:B
解析: 根据鞣质的化学结构特征可将其分为三类,复合鞣质、缩合鞣质、可水解鞣质。
—Emily, here's a dictionary. I hope it will help you.
—Thank you. It's ______ what I need. [ ]
A. just
B. still
C. only
D. almost
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