小起的喜欢 | LOFTER（乐乎） - 让兴趣，更有趣
LOFTER for ipad —— 让兴趣，更有趣
小起 的喜欢
&nbsp&nbsp被喜欢
&nbsp&nbsp被喜欢
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this.p={ dwrMethod:'queryLikePosts',fpost:'5c7ab',userId:,blogListLength:8};扫二维码下载作业帮
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我曾经想个这样一个问题 如果用一定的力吹一个纸团 纸团被吹动 那么纸团收到的力为多少 忽略了空气阻力呢然后 我又想 流速快则压强小 不知与此是否有关
这只是个人猜想 并不乱来的意思
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纸团之所以被吹动，就是因为受到了空气阻力。你不要认为空气阻力就一定时阻碍物体运动的，空气阻力是阻碍空气和物体的相对运动。纸团不动，空气流动，纸团跟着空气流动，这个作用不就是在阻碍空气和纸团相对运动么。你想想，摩擦力一定做负功么？一定时阻力么？...
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扫描下载二维码今天的我也是帅帅哒的喜欢 | LOFTER（乐乎） - 让兴趣，更有趣
LOFTER for ipad —— 让兴趣，更有趣
今天的我也是帅帅哒 的喜欢
&nbsp&nbsp被喜欢
&nbsp&nbsp被喜欢
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更多相似达人：
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暂无相似达人，
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this.p={ dwrMethod:'queryLikePosts',fpost:'1d03f8eb_9caa2b7',userId:,blogListLength:30};你我殊途同归的喜欢 | LOFTER（乐乎） - 让兴趣，更有趣
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&nbsp&nbsp被喜欢
&nbsp&nbsp被喜欢
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{var wrapwidth = photo.ow < 500?photo.ow:500}
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镜头${lens||'-'}
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更多相似达人：
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