The reason ________ he missed this class was quite different from the one ________ you explained to

me.[ ]

A. that; why

B. why; that

C. \; that

D. why; why

下列不属于委任制的优点的是（）

A.权力集中、责任明确

B.公开平等，有效防止任人惟亲

C.指挥统一、不受牵制

D.行动迅速、简便易行

E.择优录取，在竞争基础上鉴别人才