-薯片那道题,JJ答案是说competitors的,但不对。题目是说某厂多了个非盐薯片,是针对那些即将不买盐薯片的消费者的。所以这么一弥补,薯片的销量是没有变化的(重点,因为没有强调提高或降低)。此题为assumption题。competitors这条选项很短,我记得是: only one of three competitors develops the same un-salted chips...我放弃这条是因为这条太虚,其一它提到了题目中不存在的competitors,理论上考生就能天马行空了,但GMAC一般是禁止天马行空的。我选择的应该是E: those consumers who choose the un-salted chips would not consume more than they did to salted chips. 如果那些吃无盐分薯片的消费者吃了多了呢?取非的话自然是对无盐薯片的需求量就大,因此销量很难只是维持。