OG逻辑题有一个想没通的地方，求解答

yaya杨

Vargonia has just introduced a legal requirement that student-teacher ratios in
government-funded schools not exceed a certain limit. All Vargonian children are
entitled to education, free of charge, in these schools. When a recession occurs and
average incomes fall, the number of children enrolled in government-funded schools
tends to increase. Therefore, though most employment opportunities contract in
economic recessions, getting a teaching job in Vargonia’s government-funded
schools will not be made more difficult by a recession.
Which of the following would be most important to determine in order to evaluate
the argument?
A. Whether in Vargonia there are any schools not funded by the government that
offer children an education free of charge
B. Whether the number of qualified applicants for teaching positions in
government-funded schools increases significantly during economic recessions
C. What the current student-teacher ratio in Vargonia’s government-funded
schools is
D. What proportion of Vargonia’s workers currently hold jobs as teachers in
government-funded schools
E. Whether in the past a number of government-funded schools in Vargonia have
had student-teacher ratios well in excess of the new limit

因为题目有说老师学生比例限制，所以我觉得BC都是可以的啊。因为BC都可以成为老师这个工作求职的绊脚石啊。
答案是B

yaya杨

TianNao 发表于 2017-3-20 21:38
这是不对的。题目问的是not be made more difficult：如果需要大量老师，会更容易；如果不需要大量老师 ...

谢谢哈~

TianNao

yaya杨 发表于 2017-3-18 14:07
我是觉得BC,都是对的。
C：ratio接近极限，那么说明学生多太多，老师需要大量。
ratio没接近极限，那么学 ...

老师也不会需要大量=老师职业竞争压力还是很大

这是不对的。题目问的是not be made more difficult：如果需要大量老师，会更容易；如果不需要大量老师，就是维持现状。无论ratio是多少，都不会导致“more difficult”。

个人觉得evaluate题目最好的方法就是把选项当成问句，然后假设两个相反的答案，正确选项的两个答案应该是一个加强结论一个削弱结论。

yaya杨

changfengpx 发表于 2017-3-18 16:08
这道题前提（premise）是When a recession occurs, the number of children enrolled in government-funde ...

噢噢，明白啦。
题中说到recession相当于是一种假设情况，只是在陈述一个假设的情况会出现结论。
而这个假设情况和目前的ratio没有关系滴。
阿里噶都~~~

changfengpx

这道题前提（premise）是When a recession occurs, the number of children enrolled in government-funded schools tends to increase.
结论（conclusion）是： in economic recessions, getting a teaching job in Vargonia’s government-funded schools will not be made more difficult by a recession.
问题问评估，就是找到一个选项，与 when recession: children enrolled increase→teaching job will not difficult有关

正确答案：B. Whether the number of qualified applicants for teaching positions in government-funded schools increases significantly during economic recessions （提到在 recession的情况下，teaching job number的增量是多少，跟问题要找的选项一致）
C. What the current student-teacher ratio in Vargonia’s government-funded schools is （注意选项这里是current的情况，跟recession的情况其实是不一样的。因为文中没有提到 current就是处于recession的，有可能current是 处于一个正常的经济状况，recession要等5年以后，那么current ratio不能评估recession ratio了，因此不能评估recession时候的关系）

yaya杨

TianNao 发表于 2017-3-18 00:02
题目中说了“ ratios not exceed a certain limit.”，同时“the number of children to increase”，那么 ...

我是觉得BC,都是对的。
C：ratio接近极限，那么说明学生多太多，老师需要大量。
ratio没接近极限，那么学生数量在可控范围内，老师也不会需要大量=老师职业竞争压力还是很大

TianNao

题目中说了“ ratios not exceed a certain limit.”，同时“the number of children to increase”，那么我们得出结论：如果ratio已经达到limit， 那么我们需要增加老师；如果ratio没有达到limit，可能就不要增加老师。

B：Whether the number of qualified applicants for teaching positions in government-funded schools increases significantly during economic recessions。
如果申请人数大幅增加，那么求职就会变难；
如果申请人数没有大幅增加且需要增加老师，求职会更简单（不会更难）；
如果申请人数没有大幅增加且不需要增加老师，求职难度不变（不会更难）。

申请人数是否大幅增加会导致完全相反的结论。选B。

C：What the current student-teacher ratio in Vargonia’s government-funded schools is
如果现在的ratio已经达到limit，就需要更多的老师，求职难度与申请人数相关，
现在的ratio没有达到limit，不需要更多的老师，求职难度还是跟申请人相关。

所以现在的ratio并不能决定求职难度。

Jez

我刚做到这道题，我也选了C