※ 引述《santa ( )》之铭言： : 175. 18356-!-item-!-187;#058&011490 : Before being simplified, the instructions for computing income tax in Country : R were to add 2 percent of one's annual income to the average (arithmetic : mean) of 100 units of Country R's currency and 1 percent of one's annual : income. Which of the following represents the simplified formula for : computing the income tax, in Country R's currency, for a person in that : country whose annual income is I ? : (A) 50 + I/200 : (B) 50 + 3I/100 : (C) 50 + I/40 : (D) 100 + I/50 : (E) 100 + 3I/100 : 答案是(C) : 求救~~!! 请问题目的意思是??? 一点头绪也没有.. 谢谢 >< 题目的意思应该是这样 income tax的计算方法为 add 2 percent of one's annual income to (某人的年收入的2%) the average (arithmetic mean) of 100 units of Country R's currency and 1 percent of one's annual income (也就是100与某人年收入百分之一 两者的的算术平均数) 简化成数学式如下 income tax = 0.02I + (100+0.01I)/2 计算一下即可得出 50 + I/40 (C) 希望这样有回答到你的问题 ：） --

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