凭医师处方才能在零售药店购买的是（）
A.医疗机构配制的制剂
B.处方药
C.甲类非处方药
D.保健食品
E.麻醉药品
参考答案：B
蚕豆种子中，可以发育成新植物体的结构是（ ）
A．种皮
B．胚
C．胚乳
D．子叶
There ____ a terrible accident then, ____ three passengers were killed and twenty were injured as well.
A．was occurred; which
B．was occurred; in which
C．occurred; which
D．occurred; in which
