(a+b)³展开公式:a³+3a²b+3ab²+b³ (a-b)³展开公式:a³-3a²b+3ab²-b³. 完全立方公式包括完全立方和公式和完全立方差公式,完全立方和(或差)公式指的是两数和(或差)的立方等于这两个数的立方和(或差)与每一个数b 的平方乘以另一个数3倍的和(或差)。
B cup为上胸围和下胸围差距 12.5 cm, 所以上胸围即可用以下算式求得: 上胸围 = 75 + 12.5 = 87.5 cm 对照一下换算表, 是在89~91 cm的范围, 有点误差, 不过cup的算法是有点range的, B也有分 B-, B, B+, 所以这个算法还是正确的。 (3) 32C 和 34C 都是 C cup, 怎麼看起来不一样呢?
1m代表一百万,1b代表十亿,m是单词million的缩写,1m=100万;b是单词billion的缩写,1b=10亿。还有更大的数量单位,百亿就是ten billion,千亿是one hundred billion,b 万亿很少用到,单词是trillion。 温馨提示:以上解释仅供参考。
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