哪类药材可用泡沫指数或溶血指数作为质量指标
A．含皂苷的药材 B．含挥发油的药材 C．含生物碱的药材D．含黄酮的药材 E．含油脂的药材
参考答案：A
27. Little Anna's parents walked slowly, one after________, through the shallow water of a stream to search for her lost bag.
A. the other B_ another C. other D. Others
We congratulated him ______ his getting a gold medal.That is to say: we offered him our congratulations ______ his getting a gold medal.
A．at;on
B．of;on
C．on;for
D．on;on
