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第三课 压缩空气
https://www.29294.com/press/1343399608633794560/book/1343399357734723584/unit/1343399358200291328/class/1343399358338703360
第四课 空气有质量吗
https://www.29294.com/press/1343399608633794560/book/1343399357734723584/unit/1343399358200291328/class/1343399358380646400
第五课 一袋空气的质量是多少
https://www.29294.com/press/1343399608633794560/book/1343399357734723584/unit/1343399358200291328/class/1343399358443560960
第六课 我们来做“热气球”
https://www.29294.com/press/1343399608633794560/book/1343399357734723584/unit/1343399358200291328/class/1343399358489698304
第七课 风的成因
https://www.29294.com/press/1343399608633794560/book/1343399357734723584/unit/1343399358200291328/class/1343399358540029952
第八课 空气和我们的生活
https://www.29294.com/press/1343399608633794560/book/1343399357734723584/unit/1343399358200291328/class/1343399358586167296
第三单元 天气
第一课 我们关心天气
https://www.29294.com/press/1343399608633794560/book/1343399357734723584/unit/1343399358632304640/class/1343399358678441984
第二课 认识气温计
https://www.29294.com/press/1343399608633794560/book/1343399357734723584/unit/1343399358632304640/class/1343399358724579328
第三课 测量气温
https://www.29294.com/press/1343399608633794560/book/1343399357734723584/unit/1343399358632304640/class/1343399358770716672
第四课 测量降水量
https://www.29294.com/press/1343399608633794560/book/1343399357734723584/unit/1343399358632304640/class/1343399358816854016