数学机经很有用，我用了4个小时把网上JJ12月份的写得清楚的大概看了一遍，觉得有疑问的单独列出来研究一下。考试时碰到眼熟的大概6个，不用想就可以写出答案的3个。不过本人记到的不多，xdjm凑活着看吧。

 r，s，t 除以5的余数相同，问t    (C)
   (1) r+t=s
   (2)20小于等于t小于等于24
   根据1判断出来余0或者5，根据2判断是20

f(n) = 1*2*4*8 … *n, n為偶數。問f(20)+f(22)的greatest prime factor

有多少对（x,y）x,y都是整数，满足2X+Y=12且Y的绝对值小于等于12  （13）

除了一道题，基本上都没什么陷阱。那道题我5分钟都没看明白。一个汽车交易场有超过10辆车有雾灯（简称F。场内40%的车有F和窗户的某个部件简称（W）。问场内有F的车是不是少于有W的车？

a)80%有F的车没有W

 b) …

条件A真的很诡异。

作文机经、

自己考时作文argument碰到一个老题（可惜没练过）：就是224篇的首篇

The following appeared as part of an annual report sent to stockholders by Olympic Foods, a processor of frozen foods.

“Over time, the costs of processing go down because as organizations learn how to do things better, they become more efficient. In color film processing, for example, the cost of a 3-by-5-inch print fell from 50 cents for five-day service in 1970 to 20 cents for one-day service in 1984. The same principle applies to the processing of food. And since Olympic Foods will soon celebrate its twenty-fifth birthday, we can expect that our long experience will enable us to minimize costs and thus maximize profits.”

ISSUE 是

The most effective way for managers to assign work is to divide the complex tasks into their simpler small parts. This way, each worker finishes a smaller portion of the tasks and contributes to the whole.