黄芩软化韵最佳方法是
A.冷水浸泡
B.闷润
C.清蒸
D.漂洗
E.炒制
参考答案:C
解析:黄芩采取蒸润法软化,主要是杀酶保苷,防止有效成分黄芩苷的损失。
It was hard for him to learn English in a family, in which _____ of the parents spoke the language.
A.none
B.neither
C.both
D.each
混合材料按其性质可分为两大类:活性混合材料和非活性混合材料。