(2013·西安一检)There are many new central leaders in China now, ________ many once worked in the western provinces.

A．in which

B．of whom

C．in whom

D．for whom

硫磺与雄黄的相同功效是（）

A.解毒杀虫

B.解毒凉血

C.解毒止痛

D.解毒通便

E.解毒清热