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【单选题】
由于系统无法预先知道一个作业未来访问页面的情况,所以( )在实际上是无法实现的。A.
先进先出淘汰算法
B.
最近最少使用淘汰算法
C.
最优淘汰算法
D.
最不常用页面淘汰算法
拍照语音搜题，微信中搜索"皮皮学"使用
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知识点：
皮皮学刷刷变学霸
举一反三
【单选题】Whom is the person phoning?
A.
General Public Services.
B.
City Chiropractic.
C.
A water supplier.
D.
Letta Parks.
【单选题】Since we ____ for almost two weeks, I’ll need to buy a large backpack in advance to carry my supplies of food and water.
A.
have walked
B.
will be walking
C.
have been walking
D.
walked
【单选题】听力原文：Okay, Alan and I are ready to get going. We have the food and most of the supplies, and we've put both kayaks on the roof of your car. You should drive ahead of us—we'll follow closely behind you...
A.
Skiing
B.
Boating
C.
Camping
D.
Fishing
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