回複：那個４＋６也是電阻是分散學生注意力的。

來源: 雞毛蒜皮於 2013-12-13 10:47:12 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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回複：那個４ ＋ ６ 也是電阻是分散學生注意力的。