Larry asks Bill and Peter to go on a picnic with him, but _       of them wants to, because they have

work to do.[ ]

A. either                          

B. any

C. neither                        

D. none

β-内酰胺类抗生素药物分析的基本性质是：（）

A.氢化噻唑环的羧基的酸性

B.β-内酰胺环的不稳定性

C.分子结构中的共轭双键骨架，手性碳原子

D.B+C

E.A+B+C