GWD20-Q27请指教

Gwd20-q27

A significant number of complex repair jobs carried out by Ace Repairs have to be reworked under the company’s warranty.  The reworked jobs are invariably satisfactory.  When initial repairs are inadequate, therefore, it is not because the mechanics lack competence; rather, there is clearly a level of focused concentration that complex repairs require that is elicited more reliably by rework jobs than by first-time jobs.

The argument above assumes which of the following?

1. There is no systematic difference in membership between the group of mechanics who do first-time jobs and the group of those who do rework jobs.
2. There is no company that successfully competes with Ace Repairs for complex repair jobs.
3. Ace Repairs’ warranty is good on first-time jobs but does not cover rework jobs.
4. Ace Repairs does not in any way penalize mechanics who have worked on complex repair jobs that later had to be reworked.
5. There is no category of repair jobs in which Ace Repairs invariably carries out first-time jobs satisfactorily.

   Answer: a

没有思路，请大家指点，万分感谢啊！

A significant number of complex repair jobs carried out by Ace Repairs have to be reworked under the company’s warranty.  The reworked jobs are invariably satisfactory.  When initial repairs are inadequate, therefore, it is not because the mechanics lack competence; rather, there is clearly a level of focused concentration that complex repairs require that is elicited more reliably by rework jobs than by first-time jobs.

这题我也做错了。我查了一下，invariably是”永不变的，始终不变的“的意思。也就是说reworked job一直是很满意的。这说明do first-time job的member和do rework job的member都技术水平都差不多。

E 无关

修理工种不是文章讨论的范围

文章的解释中，并未提及工种的区分。即使对E取菲，也不影响结论的成立与否。两种分类并不互相影响