Chrome，
QQ浏览器
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![苏教版高中生物必修3《4.2生态系统中的物质循环》[段老师]【市一等奖】优质课_优质课教学视频(配课件教案)](//imgshow.1ydt.com/img?url=%2F%2Fi2.hdslb.com%2Fbfs%2Farchive%2F58f84d434188b8a4c2e6ca77eab926f6798e3217.jpg%40672w_378h_1c_%21web-search-common-cover)
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播放：9 时间：2025-11-08简介： -
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![苏教版高中生物必修3《4.2生态系统中的物质循环》[段老师]【市一等奖】优质课_优质课教学视频(配课件教案)](http://imgshow.1ydt.com/img?url=%2F%2Fi2.hdslb.com%2Fbfs%2Farchive%2F58f84d434188b8a4c2e6ca77eab926f6798e3217.jpg%40672w_378h_1c_%21web-search-common-cover)
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