中药材产地加工的意义是
A.利于运输、储藏、保管
B.利于有效成分的提取
C.保证药材质量
D.利于药材商品规格标准化
E.便于保存药材的有效成分
参考答案:A,C,D,E
—I _____ a set of keys. Do you see them?
—Sorry, but you can go to the lost and found. [ ]
A. lost
B. found
C. have
如看到巴西人向你握紧拳头,向上伸出大拇指,则应赶紧准备自卫。()