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    19．A great amount of information have been used．

    分析 大量的信息已经被应用．

    解答 1．have改成has；考查主谓一致，information是不可数名词，谓语动词要用单数形式．

    点评 本题考查基本知识，平时学习中考生应加强基础知识的应用和积累．

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