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
正确答案：A
以下是高智威老师的解释：
思考：1. 文中告诉我们，是否“this method is unlikely to be commercially viable”，主要是比较uranium from seawater 和 uranium on the world market (uranium from mines),谁的成本比较高（也就是原因）。换句话说，from seawater的成本高，那就commercially viable, 否则不是；2. 所以，正确答案一定与原因相关，并且不能有无关名词。
我的疑问：
1、请问highlight蓝色部分是什么意思？有人能帮我翻译一下这句话吗？
2、highlight绿色部分不懂，这个方法是否可行，关键不是在于cost of extracting uranium from seawater can somehow be reduced，为什么要两个比较，才能得出这个方法是否可行？！
(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
正确答案：A
以下是高智威老师的解释：
思考：1. 文中告诉我们，是否“this method is unlikely to be commercially viable”，主要是比较uranium from seawater 和 uranium on the world market (uranium from mines),谁的成本比较高（也就是原因）。换句话说，from seawater的成本高，那就commercially viable, 否则不是；2. 所以，正确答案一定与原因相关，并且不能有无关名词。
我的疑问：
1、请问highlight蓝色部分是什么意思？有人能帮我翻译一下这句话吗？
2、highlight绿色部分不懂，这个方法是否可行，关键不是在于cost of extracting uranium from seawater can somehow be reduced，为什么要两个比较，才能得出这个方法是否可行？！
(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
正确答案：A
以下是高智威老师的解释：
思考：1. 文中告诉我们，是否“this method is unlikely to be commercially viable”，主要是比较uranium from seawater 和 uranium on the world market (uranium from mines),谁的成本比较高（也就是原因）。换句话说，from seawater的成本高，那就commercially viable, 否则不是；2. 所以，正确答案一定与原因相关，并且不能有无关名词。
我的疑问：
1、请问highlight蓝色部分是什么意思？有人能帮我翻译一下这句话吗？
2、highlight绿色部分不懂，这个方法是否可行，关键不是在于cost of extracting uranium from seawater can somehow be reduced，为什么要两个比较，才能得出这个方法是否可行？！