酚子中的羟基氢可被金属钠取代,放出氢气。
参考答案:对
Oh,I'm not feeling well in the stomach.I ________ so much fried chicken just now.
A.shouldn't eat
B.mustn't have eaten
C.shouldn't have eaten
D.mustn't eaten
金银花中抗菌主要成分是()
A.木犀草素
B.小檗碱
C.大黄酸
D.绿原酸
E.丁香酸