GWD-8-13

Q13:

With a record number of new companies starting up in Derderia, and with previously

established companies adding many new jobs, a record number of new jobs were created

last year in the Derderian economy. This year, previously established companies will not

be adding as many new jobs overall as such companies added last year. Therefore, unless

a record number of companies start up this year, Derderia will not break its record for

new jobs created.

Which of the following is an assumption on which the argument relies?

A. In a given year, new companies starting up create more new jobs on average than

do previously established companies.

B. The number of people seeking employment is no larger this year than it was last

year.

C. This year, the new companies starting up will not provide substantially more jobs

per company than did new companies last year.

D. Previously established companies in Derderia will be less profitable this year than

such companies were last year.

E. The number of jobs created in the Derderian economy last year was substantially

larger than the number of jobs lost.

答案: C

A为什么不对?　

原文结论是新工作没去年多。新工作分两部分previously established companies 产生的新工作和new companies 产生的新工作。原文已知道previously established companies 产生的新工作没去年多，需要的假设是今年的new companies 产生的新工作和去年new companies 产生的新工作比较情况。对于A所说的new companies 产生的新工作比previously established companies 产生的新工作多和原文的结论没关系。比较对象错误。

谢谢, 我把选项看拧了, 给多加了个not, 其实那个given year 已经标志了这不是个答案.

这题还是有点不明白：

C选项不是和提干Therefore, unless a record number of companies start up this year, Derderia will not break its record for new jobs created有冲突吗？如果C成立，则提干就不成立了？？？因为提干说如果a record number of companies start up this year,则Derderia will break its record for new jobs created. 可从C推不出来啊？？？

我是这么想的：

假设：
     去年有p1个公司创造了x1个工作，并且新增n1个公司创造了y1个工作。则去年一共有p1*x+n1*y1个工作；
     今年有(p1+n1)个老公司，创造x2个工作，并且新增n2个公司创造y2个工作。则今年有(p1+n1)*x2+n2*y2个工作。
     已知p1*x>(p1+n1)*x2,要想使p1*x+n1*y1<(p1+n1)*x2+n2*y2就必须使n1*y1<n2*y2.
     而依题意，今年的新增公司必须创纪录(也就是n1<n2)才能使结论成立，所以必有一前提使y2=或<y1====>选C

好复杂啊！请nn指点。
         

楼上的能把逻辑用数学公式表达出来。   厉害。

这题，我觉得前面lawyer解释的很清楚的。

都看成是老公司，和新公司2个整体好了。不用这么复杂。在第2部分，把去年的新公司再分别独立开。 其实楼上的数学表达，已经很清楚了。

其实挺简单的，题干上说：除非今年新增加的公司数量上能有比去年多，否则总的工作机会就会比去年少。

C去掉not后：今年每家公司创造的工作比去年要多-->那就有可能：即使数量少，但创造的工作机会反而多--->削弱！

所以C。

简而言之，看作是数量和效率、或者是价格和利润之类的，一个道理

"This year, previously established companies will not be adding as many new jobs overall as such companies added last year"，

如果这句话的老公司仅指去年的老公司，答案就是C（即使这样，也要考虑到去年新公司今年的表现情况），如果今年的老公司等于去年的老公司加上去年的新公司，则题干给出的意思是今年的老公司创造的工作比去年所有的新工作少，这样觉得应选A，盼确定。

哦，我想通了，A应该算weaken，只能选C了