狒狒上的一道题

猫小雯雯

45. Commissioner:Budget forecasters project a revenue shortfall of a billion dollars in thecoming fiscal year. Since there is no feasible way to increase the availablefunds, our only choice is to decrease expenditures. The plan before yououtlines feasible cuts that would yield savings of a billion dollars over thecoming fiscal year. We will be able to solve the problem we face, therefore,only if we adopt this plan.

This reasoning inthe commissioner’s argument is flawed because this argument

(A) relies oninformation that is far from certain

(B) confuses beingan adequate solution with being a required solution

(C)inappropriately relies on the opinions of experts

(D)inappropriately employs language that is vague

(E) takes forgranted that there is no way to increase available funds
答案选择B，是说这个plan是必要条件不是充要条件，对充分必要有点不明白，，，麻烦NN解释一下~~

leo688

拙见：
题干说提供了一个减少开支的办法，同时结论是“only if”执行这个办法，这样就没有给其他方法机会。如果有另外一个办法也可以减少开支，“only if”就用的不合适了。B点出了这个漏洞。

猫小雯雯

leo688 发表于 2014-8-10 17:07
拙见：
题干说提供了一个减少开支的办法，同时结论是“only if”执行这个办法，这样就没有给其他方法机会。 ...

原来是这样子~~我一直没注意only if ~~谢谢你啦