我问你答：北京奥运开幕式你看到了什么科技？

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Semon @ Aug 9th 2008 5:39AM

五环确实漂亮，思考了一下原理，应该是在透明的薄膜上固定了很多led灯，可以分组打开，再投影，这样，投影结束，就可以把led的薄膜拉起来了

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Semon @ Aug 9th 2008 5:39AM

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