标题: PREP1-Q16~NN们，麻烦啦~ [打印本页] 作者: evelyn205205 时间: 2011-7-24 10:30 标题: PREP1-Q16~NN们，麻烦啦~ Most of the world's supply of uranium currently comes from mines.It is possible to extract uranium from seawater, but the cost of doing so is greater than the price that uranium fetches on the world market.Therefore, until the cost of extracting uranium from seawater can somehow be reduced, this method of obtaining uranium is unlikely to be commercially viable.
Which of the following would it be most useful to determine in evaluating the argument?
(A) Whether the uranium in deposits on land is rapidly being depleted
(B) Whether most uranium is used near where it is mined
(C) Whether there are any technological advances that show promise of reducing the cost of extracting uranium from seawater
(D) Whether the total amount of uranium in seawater is significantly greater than the total amount of uranium on land
(E) Whether uranium can be extracted from freshwater at a cost similar to the cost of extracting it from seawater
答案：A。不理解A的逻辑，和在陆地上的uranium被清空有什么关系呢？ 为什么不是D呢？作者: evelyn205205 时间: 2011-7-24 14:01
up~作者: evelyn205205 时间: 2011-7-24 15:19
为什么没人理我呢，作者: evelyn205205 时间: 2011-7-24 19:42
is there anyone who can help me？作者: evelyn205205 时间: 2011-7-24 20:16
NN们，你们在哪里？我需要你们的帮助，谢谢啊~作者: evelyn205205 时间: 2011-7-24 21:48
hello~作者: 塔罗牌 时间: 2011-7-25 00:06
(A) Whether the uranium in deposits on land is rapidly being depleted 如果陆地上的URANIUM的储量已经快被消耗光了 那么不管从海中提炼它的COST有多贵 我们也只有用了
