When electrical equipment is involved in a fire，the stream of dry chemicals should be（）.

A.aimed at the source of the flames

B.fogged above the equipment

C.shot off a flat surface onto the flames

D.used to shield against electrical shock

在融资租赁的期末，承租人对设备最常见的处理方式是（）。

A.退回给租赁公司

B.让设备报废

C.以象征性价格留购设备

D.转租给其他公司