中文说明：2018美赛B题参考文献（内含网址）
English Description：
References to question B of the 2018 American Championship (including website)
References to question B of the 2018 American Championship (including website)
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中文说明：2018美赛B题参考文献（内含网址）
English Description：
References to question B of the 2018 American Championship (including website)2018美赛B题参考文献.doc