Xinjiang is one of the areas        sandstorms happen most often,        results from a dry climate, vast desert and a strong wind.

A．where; which

B．when; that

C．where, that

D．that; which

具有祛风湿、补肝肾、强筋骨、利水消肿功效的药物是（）

A.薏苡仁

B.桑寄生

C.五加皮

D.威灵仙

E.桑白皮