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

不符合根尖周病治疗技术无菌操作的是（）

A.术者双手要求消毒

B.使用的器械严格消毒

C.每步骤严格要求无菌操作

D.已感染患牙不必做无菌操作

E.橡皮障隔湿有利于无菌操作