Organizations perform work to achieve a set of objectives. Generally, work can be categorized as either projects or operations, although the two sometimes are（）

A．confused

B．same

C．overlap

D．dissever

脱氢切油时要求进料量在5分钟内从0均匀的上升至正常进料量的60%是基于对（）的保护。

A.脱氢进料加热炉

B.进料换热器

C.脱氢反应器

D.循环氢气压缩机