标题: OG13 DS 26题 答案解析中的30,000怎么来的 [打印本页] 作者: tona115 时间: 2013-9-1 22:42 标题: OG13 DS 26题 答案解析中的30,000怎么来的 蠢蠢的问一下……
OG13 DS练习部分，第26题：
The profit from the sale of a certain appliance increases, though not proportionlly, with the number of units sold. Did the profit exceed $4 million on sales of 380,000 units?
(1) The profit exceeded $2 million on sales of 200,000 units.
(2) The profit exceeded $5 million on sales of 350,000 units.
答案解析（301页）提到：It is given that the profits do increase with the number of units sold. Therefore, since the profit on sales of just 350,000 units well exceeded $4 million, then sales of 350,000+30,000=380,000 units would also have a profit exceeding $4 million.