求解一道逻辑题

sissi8466

With a record number of new companies starting up in Derderia and with previously established companies adding many 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) Each year, new companies starting up create more new jobs overall than do previously established companies.
(B) Companies established last year will not add a greater number of jobs overall this year than they did 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) This year, the overall number of jobs created by previously established companies will be less than the overall number of jobs lost at those companies.
(E) The number of jobs created in the Derderian economy last year was substantially larger than the number of jobs lost last year.


答案是C,但我觉得有些奇怪。题目最后一句话说除非今年有成立新公司的纪录，否则derderia 将不会打破新工作的纪录。我个人觉得B更合适，因为以前建立的公司没有提供比去年多的新工作，去年建立的公司也没有提供比去年多的新工作，那么就只有今年新建立的公司提供新工作这样才能打破去年的纪录，符合最后题目一句话。如果选C的话，今年成立的新公司提供的工作机会不会比去年多的话，我觉得和题目最后一句话矛盾。我不知道是不是我理解错意思了，请各位帮忙解释下，谢谢！

cycyang

With a record number of new companies starting up in Derderia and with previously established companies adding many 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.

这道题的核心是“工作岗位”。去年新增工作岗位数创了新高归结于2个原因：1.创纪录的新建公司数量  2.已有公司增加工作岗位

今年的情况是：已有公司新增工作岗位的数量不会多于去年。

结论：除非新建公司数量再创新高，今年不会打破去年新增岗位数。

假设
(C) This year, the new companies starting up will not provide substantially more jobs per company than did new companies last year.
今年每个新建公司不会提供高于去年的岗位数。（正确，因为总岗位数=每个公司提供的岗位数*公司数量）

sissi8466

哦，明白了，谢谢！