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(2013·安徽蚌埠第一次质检)Finding information in today's world is easy. The ________ is how you can tell if the information you get is useful or not.
A.knowledge B.ability
C.competition D.challenge
D
选D 考查名词辨析。句意:当今世界找寻信息很容易,但困难的事是你如何辨别你所获得的信息是否有用。knowledge“知识”;ability“能力”;competition “竞赛”;challenge: a new or difficult task“挑战;艰巨任务”。
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