The money collected should be made good use ________ the people in Taiwan who suffered a lot in the

earthquake.[ ]

A. of helping

B. to help

C. to helping

D. of to help

PLC进入运行后，便进入程序执行过程，下列选项中不属于程序执行阶段的是（）。

A.内部处理

B.输入采样

C.程序执行

D.输出刷新