属于游离香豆素的化合物是（）
A.七叶苷
B.七叶内酯
C.五味子素
D.黄芩素
E.大黄酸
参考答案：B
_____, Lucy is of great help in the work. [ ]
A. Girl as she is
B. A girl as she is
C. The girl as she is
D. As she is girl
濒临两个海域，其对虾、扇贝、鲍鱼等海珍品的产量和出口量皆居全国第一位的省是（ ）
A．辽宁
B．河北
C．江苏
D．山东
