中文说明：对面的伙伴看过来，看过来看过来，这里有材料很精彩！！
English Description：
The opposite partners look over, look over, look over, here are materials, very wonderful!!
The opposite partners look over, look over, look over, here are materials, very wonderful!!
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中文说明：对面的伙伴看过来，看过来看过来，这里有材料很精彩！！
English Description：
The opposite partners look over, look over, look over, here are materials, very wonderful!!数学建模教材.rar