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小升初奥数： 每天7点接工程师。出故障迟到了20分钟，求耽误时间
小升初奥数28/77
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App06:42![小升初奥数： 比较特殊的裂差计算[分母是完全平方数]](http://p26-sign.bdxiguaimg.com/tos-cn-i-0026/aa3a45fa9d0843f4b88a64e6b8e51976~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&biz_tag=list_custom%2Fnone&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=20250313065323EDC56C45662412181C54&requestFrom=704&version_code=80402&x-expires=1773356003&x-signature=505TwK7VMwGMFTP3wbOUaWxZdME%3D)
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