在农�常有家庭从井中取水小明同学用如图甲所示的�轮组提水他用20s的时间把重为120n的水从井中匀速提升5m拉力做的功w随时间t的变化 Sketch Coloring Page

在农�常有家庭从井中取水小明同学用如图甲所示的�轮组提水他用20s的时间把重为120n的水从井中匀速提升5m拉力做的功w随时间t的变化 Template

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tomski在农�常有家庭从井中取水小明同学用如图甲所示的�轮组提水他用20s的时间把重为120n的水从井中匀速提升5m拉力做的功w随时间t的变化 coloring

从抱瓮取水到辘轳汲水，说说中国古代汲水工具的变迁辘轳�井意象新浪新闻 sketch template

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从抱瓮取水到辘轳汲水，说说中国古代汲水工具的变迁生活意象原理�井绳子新浪新闻 sketch template

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