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154696523

金虫 (著名写手)

正能量使者

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lebaopaula: 金币+5, 博学EPI+1, ★★★很有帮助 2013-01-13 18:40:09
看到的不一定是真实的,那样放置很难放稳定,除非插在橡皮泥上;
翘起来重量变轻是次要原因,热空气的浮力和对流起了主要作用,还有火柴头部的燃烧反应生成的过程正好提供了一个向上的扭矩,这有点偶然性因素
Positive energy makes life better
4楼2013-01-12 14:54:16
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