lsat-2

oncemore

19. Nearly all mail that is correctly addressed arrives at its destination within two business days of being sent. In fact, correctly addressed mail takes longer than this only when it is damaged in transit. Overall, however, most mail arrives three business days or more after being sent.

If the statements above are true, which one of the following must be true?
a) A large proportion of the mail that is correctly addressed is damaged in transit.
b) No incorrectly addressed mail arrives within two business  days of being sent.
c) Most mail that arrives within two business days of being sent is correctly addressed.
d) A large proportion of mail is incorrectly addressed.
e) More mail arrives within two business days of being sent than arrives between two business days after being sent.

答案是d,可是我总觉得不对头，每次总是选错，我觉得每个答案都不对......

为什么d会对？如果大部分都是地址正确而又在运输时被损坏了的情况，也同样可以得出结论啊。

tongxun

oncemore：A、B、C的范围太大，而E在原文中根本没提及，所以都错。
D：文章主要讲 most mail arrives three business days or more after being sent
既然超过“地址正确、没有损坏”的时间，则可有良种情况：1）地址正确并损坏的占多数（如你所讲），但有一个前提：地址正确的信必须要占总信的多数；2）地址错误的占多数
《为什么d会对？如果大部分都是地址正确而又在运输时被损坏了的情况，也同样可以得出结论啊。》这样得需要两个条件了。

maxwell

其实"Nearly all mail that is correctly addressed arrives at its destination within two business days of being sent. In fact, correctly addressed mail takes longer than this only when it is damaged in transit" 说明了如下问题:1地址正确的信2天内到. 2 只有少数信在过程中被损坏. 后文又说大部分信3天到, 所以说明很多信地址写错了.

oncemore

谢谢maxwell, 看了你的解释我仔细读了原句，才发现我一直把句子理解错了。
原句意思原来是： 几乎所有地址正确的信在两天内到达，只有被损坏的信多于两天被送到。 我理解成：所有地址正确的信几乎都在两天内送到......
nearly修饰的关系理解错误。