油剂和粉剂消毒灭菌可以选什么方法（）
A.压力蒸汽灭菌
B.干热灭菌
C.环氧乙烷灭菌
D.紫外线灭菌
参考答案：B
All of the doctors have worked for a long time, but ________ of them stop to have a rest.
A．none
B．nobody
C．neither
D．not
