求助og157

snoooooopy

Companies O and P each have the same number of employees who work the same number of hours per week. According to records maintained by each company, the employees of Company O had fewer job-related accidents last year than did the employees of Company P. Therefore, employees of Company O are less likely to have job-related accidents than are employees of Company P.

157.

Which of the following, if true, would most weaken the conclusion above?

(A) The employees of Company P lost more time at work due to job-related accidents than did the employees of Company O.

(B) Company P considered more types of accidents to be job-related than did Company O.

(C) The employees of Company P were sick more often than were the employees of Company O.

(D) Several employees of Company O each had more than one job-related accident.

(E) The majority of job-related accidents at Company O involved a single machine.

157.

The data used to support the conclusion come from the companies’ own records. Since, however, choice B indicates that, as compared with Company O, Company P tends to overstate the number of job-related accidents, choice B weakens the conclusion drawn and is the best answer.

Choice A does not weaken the conclusion, but is simply a consequence that would be expected given the data. The relevance of employees’ sicknesses (choice C) cannot be assessed without information about the links, if any, between sickness and job-related accidents. Choices D and E both give reasons for predicting a smaller likelihood that any arbitrary employee of Company O will have a job-related accidents, and thus support the conclusion.

讨论区没有这题

而且搜索过以前的帖子

关于d 和e 的解释也让我不太理解

文中结论说o比p的job-relatited accident 少，d e 中 我觉得只能分析出伤得人少，而不是事故少？

请指教！！谢谢

allfar

B是没有什么争议的.

这是一个他因的削弱.

前提是O和P的公司在几个因素上相同.但是O比P的事故少.

结论是O的员工比P的员工更加安全.

B说P的工作更多的涉及危险工作,所以P的事故比较多.

这恰好说明了一个问题,O和P存在不可比较.是因为二者性质上存在差异.

其实这道题暗含假设就是:O和P是完全相同类型的公司.

D是加强,E无关.