笔中花魁

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9/20/2009

有一种铅笔的铭牌叫2B.一个幸运品种，无数考生应考必备。为何2B能力压对手，我从google上搜出解答。
简言之，读卡器读的指标有两个，石墨浓度和被涂黑区域的面积，这两点可以得到旁证，从我们看到的答题卡上错误填涂例子中找到答案。读卡器对炭进行红外线扫描，2B以下的太淡不会被识读出来，2B以上的石墨含量多，容易随纸张粘附到其他答题卡上面，会使其他答题卡上到处都是石墨，会影响别人的成绩...早知道我就全用10B了...我不过你们也别想..

11:08 PM | Blog it

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	然潘wrote: haha~ That's funny~ Oct. 14
	偲张wrote: 2B Sept. 21

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