中文说明：2018美赛A题老师给的资料
English Description：
Information given by the teacher of problem a of the 2018 American Championship
Information given by the teacher of problem a of the 2018 American Championship
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中文说明：2018美赛A题老师给的资料
English Description：
Information given by the teacher of problem a of the 2018 American Championship电磁波信号在对流层中路径弯曲改正的级数展开式.pdf
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