2006 AMC 12B 第 6 题
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所有题目均经美国数学协会（MAA）官方合法授权使用。
6.
Francesca 用 克柠檬汁、 克糖和 克水制作柠檬水。 克柠檬汁含有 卡路里， 克糖含有 卡路里。水不含卡路里。每 克这种柠檬水含有多少卡路里？
Francesca uses grams of lemon juice, grams of sugar, and grams of water to make lemonade. There are calories in grams of lemon juice and calories in grams of sugar. Water contains no calories. How many calories are in grams of her lemonade?
答案：B
小提示：
先求整批柠檬水的总卡路里和总克数
Find the total calories and total grams of the whole batch first
大提示：
克是整批 克的三分之一
grams is one third of the full -gram batch
解答：
整批柠檬水重 克，含有 卡路里。
因为 克是整批的三分之一，所以它含有 卡路里。
因此，正确答案是 B。
The full batch weighs grams and contains calories.
Since grams is one third of the batch, it has calories.
Thus, the correct answer is B.
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