先前，有位战友问了我一题“卡关”的CR题。
在跟他一同讨论之后，我想这个题目是可以很好地解释考试时“技巧”使用的时机，
以及技巧之前，自己应该培养的逻辑直觉。所以在此分享。
（先说明一下，我比较注重的是讲解我在实战中真的遇到这一题的心态，
包括如果发现读不下去/抓不到点时该怎么调整。
真的看不懂的字，我也会很老实地说看不懂。
因为若是开始翻译题目，那有些时候会流于马后砲式的详解，对实战的帮助有限。
当然，平时练习对于题目逻辑的扎实训练跟完整理解也很重要，
不过本篇的重点我会放在“实战卡关如何突破”之上。
所以本题的讲解会写得有点长，请见谅）
请各位先来做做这一题：
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?
A.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.
B.There is no company that successfully competes with Ace Repairs for complex
repair jobs.
C.Ace Repairs’ warranty is good on first-time jobs but does not cover
rework jobs.
D.Ace Repairs does not in any way penalize mechanics who have worked on
complex repair jobs that later had to be reworked.
E.There is no category of repair jobs in which Ace Repairs invariably
carries out first-time jobs satisfactorily.