In student ratings all the following questions can be asked except______.
A.Can the teacher make himself easily understood?
B.How does the teacher deal with students?
C.Is what is taught new?
D.Are students interested in what is taught?
第7题
逆没食子鞣质在酸的存在下加热后可形成
A、咖啡酸和奎宁酸
B、咖啡酸和葡萄糖
C、黄烷-3-醇或黄烷-3,4-二醇和葡萄糖
D、没食子酸和葡萄糖
E、逆没食子酸(兼有没食子酸)和葡萄糖
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