算盘的输入比计算器的输入快，3个手指头对比一个手指头，但是不会比键盘的输入快，10个手指头对比3个手指头

来源: 547788 于 2016-06-16 08:54:43 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

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