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文档
项目学习活动方案-钻石公主号邮轮新冠病毒传播数模型.pdf
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画板资源
https://www.netpad.net.cn/presentationEditor/presentationPlay.html#187169
https://www.netpad.net.cn/presentationEditor/presentationPlay.html#187201
https://www.netpad.net.cn/presentationEditor/presentationPlay.html#187924