The navigation computers have one thing in common: they allA.contain series of maps on vid

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The navigation computers have one thing in common: they all

A.contain series of maps on videodiscs or videotapes.

B.contain 13,300 maps covering the continental US.

C.can be obtained free of charge.

D.cost a lot of money.

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答案解析

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  • 正确答案:A
    借助常识判断判断C,D不可能是答案。利用“navigationcomputers"作为答案线索,注意题干中的修饰词“all"这样在文章中找到答案相关句:Thesecomputersvaryindetails.ButtheyallcontainsseriesofmapsonVediodiscsorvideotapes.Forexample,onecomputersystemcontains13,300mapscoveringthecontinentalUS.划线句的内容直接揭示答案。