[原创]新东方老师对AB模式和BA模式问题的回复

新东方对AB模式和BA模式问题的回复 绿色字部分是新东方老师的回答。

做了那么久的题，对题目中哪个是B，哪个是A，仍旧不能分得很清楚。

请问下面几题中，哪些代表A， 哪些代表B？

15. The cost of producing radios in Country Q is ten percent less than the cost of producing radios in Country Y. even after transportation fees and tariff charges are added, it is still cheaper for a company to import radios from Country Q to Country Y than to produce radios in Country Y.

The statements above, if true, best support which of the following assertions?

C. the tariff on a radio imported from Country Q to Country Y is less than ten percent of the cost of manufacturing the radio in Country Y.

第一句是A,第二句是B.

请问OG 48题中的(我昨天问的题）assumption即非A ，也非B？assumption只是B的一个必要条件，和A没有关系吗？这里的A和B 之间 也没有充分关系和必要关系吧？

48. A researcher discovered that people who have low levels of immune-system activity tend to score much lower on tests of mental health than do people with normal or high immune-system activity. The researcher concluded from this experiment that the immune system protects against mental illness as well as against

physical disease.

The researcher’s conclusion depends on which of the following assumptions?

D. Mental illness does not cause people’s immune-system activity to decrease.

第一句是A,第二句是B.
conclude得出的是结论。assumption是B的必要条件，有时和A有关系，有时和A没关系。 A是前提，是我们需要承认的。

17. Toughened hiring standards have not been the primary cause of the present staffing shortage in public schools. The shortage of teachers is primarily caused by the fact that in recent years teachers have not experienced any improvements in working conditions and their salaries have not kept pace with salaries in other professions.

Which of the following, if true, would most support the claims above?

D. Many teachers have cited low pay and lack of professional freedom as reasons for their leaving the profession.

两句都是结论，都是B

Toughened hiring standards have not been the primary cause of the present staffing shortage in public schools. The shortage of teachers is primarily caused by the fact that in recent years teachers have not experienced any improvements in working conditions and their salaries have not kept pace with salaries in other professions.

Which of the following, if true, would most support the claims above?

(A) Many teachers already in the profession would not have been hired under the new hiring standards.

(B) Today more teachers are entering the profession with a higher educational level than in the past.

(C) Some teachers have cited higher standards for hiring as a reason for the current staffing shortage.

(D) Many teachers have cited low pay and lack of professional freedom as reasons for their leaving the profession.（D）

(E) Many prospective teachers have cited the new hiring standards as a reason for not entering the profession.

把这题贴全,等大家讨论  1楼说两句都是结论，都是B ????? 

我刚在陈向东的逻辑书里看到的解析,觉得说的有点不同,贴上来,大家讨论一下.

解析:短文排除了一种对于缺乏老师的解释---由于更苛刻的雇用标准----并提出了一种替代的解释---

教师缺乏是由于工资低和工作条件不佳,选项D通过指出对于许多前教师来说,低工资和工作环境差是

他们放弃这项职业的原因,为后面这种解释提供了支持性的证据,因此D是正确答案,选项AC和E提供

了证据显示新的雇用标准和师资缺乏有关,从而支持了短文反对的一种解释,选项B描述新的雇用标准

和师资缺乏有关,从而支持了短文反对的一种解释,选项B描述新雇用标准的一种可能性的结果,但它

没有提供证据来支持关于师资缺乏的一种解释优于另一种解释.

请问: 这两种解释都是结论吗,

好东西啊 感谢分享 不过 第一题的AB 还是没太弄懂。。。。两地生产成本得差异和 两地生产并且运输得成本差异 貌似 只是说明事实不存在AB关系的吧

其实AB 和BA模式没什么用。太繁琐。特别是陈向东编的这本，第一次看假设的做题方法时，模棱两可而且做题速度奇慢，他的解释就很模糊和令人费解

我上过新东方的课，小柏老师确实教得很不错，用他的方法做效率整个上来了。可惜当初没好好听课，没留下多少笔记