机经 2.24

JiCan

考得很不理想，成绩太低了。原本准备的不是特别的充分，虽然也用功了努力了。心里准备是有的，但是看到成绩之后还是非常的低落。必须二战了，很纠结，因为这次备考就很痛苦。考前看CD，前辈们很用心的在帮助我们，很感动。只可惜没能考取好成绩，惭愧！不管怎样，希望我也能尽点微薄之力，提供点机经，给大家微毫帮助，同时回报给CD——尽管成绩低没太大的参考价值。不知道什么时候换库...总之，希望能给奋斗中，忐忑中，纠结中，兴奋中的G友们带去或多或少的参考价值！
希望所有G的兄弟姐妹们都能取得好成绩。我们都不容易啊！！！加油。
能力有限，请多包容。
AA： The following appeared in a memorandum from the owner of Carlo’s Clothing to the staff:
“Since Disc Depot, the music store on the next block, began a new radio advertising campaign last year, its business
has grown dramatically, as evidenced by the large increase in foot traffic into the store. While the Disc Depot’s
owners have apparently become wealthy enough to retire, profits at Carlo’s Clothing have remained stagnant for the
past three years. In order to boost our sales and profits, we should therefore switch from newspaper advertising to
frequent radio advertisements like those for Disc Depot.”

AI：Governments should not be responsible for regulating businesses and other organizations. Instead, society would benefit if the organizations themselves assumed the responsibility for establishing and enforcing their own standards and regulations.”

数学
1、DS：Is n^m > m^n?
1 m<n
2 n<=2m
思路：举例 n=2 m=3   和 n=2 m 4 得出 1和2都不满足
2、from 10 to 99, inclusive how many number is divisible to 3 or 7?
思路：33*3=99 前100有33个数是3的倍数 除去 3、 6、 9 则10到99里有30个3的倍数
          14*7=98前100有14个数是7的倍数 出去7 则10到99里有13个7的倍数
          重复的数即21的倍数有 4个    答案： 30+13-4
3、DS：ac-bc^3=6  what is the value of  a-b?
1 ac=a
2 bc^3=b
思路： 1&2
4、the profit of a product reach to 30%of the cost from 12% of the cost after changing the price, the cost remained, the new price is 274, what is the value of old price?
思路：274-c=30%c   p -c=12%c  联立得P
5、is x^2>1/3*x?
1 忘了不好意思
2 x 绝对值大于1/3
思路：2 满足
6、E and F 发生的概率都为P， 求E发生F不发生的概率？
思路：P-P^2
7、a place has 2400 people, the unemployment rate in November is near 6%, in December is 3%, people working in November still work in December, how many people work in November still work in December?
A 25  B 93  C 108  D ... E...
思路：2400*(6%-3%)=72 但是选项没有 因为题中说6%和3%都是近似值，那么两个月的rate 范围分别是 6.4%到5.5%  和 3.4%到2.5% ，于是所求人数最多应该是2400*（6.4%-2.5%）=93.6，最少应该是 2400*（5.5%-3.4%）=50.4 所以应该选B
8、2(m-1)(n-1)=(m+1)(m-1)   s=m+n  (s-12)(s-15)=0  what is the value of n?
1 m=4 or 5
2 m=3 or 4
思路：做这道题要有耐心和细心，把m加n等于12或15的分别情况和每一项m值的2种情况一一联立得出不同n，把相应m、n带入最前面的等式看是否成立，发现1中只有m=4 n=11满足所有已知条件 2中也同样 所以选D
9、10people, 4of them know French while the other know only Spanish or Germany, select 3 people from the 10, at least 1 of the selected people knows French, how many ways of selection ?
思路：C(10，3)-C(6,3)=120-20=100
10、DS:   we have five outcome : 0、1、2、3、4 XP(X)
00.013
10.091
20.221
3    ?
4    ?
what is the value of P(4)?
1 p(3)=2P(4)
2 p(3)>p(4)
思路：所有可能的结果的概率和为1  所以选A
11、 triangle ABC, AB=15, BC=25 what is the value of AC?
1 AC is a squared number
2 AC>20
思路：只有1 &2结合才能确定AC长度为25
12、(x^2-9x+18)/(x^2-9)?
思路：答案为(x-6)/(x+3)
13、set S and T have the same number of intergers, is the medium of S > the average of T?
1 S consist of consecutive even numbers, T consists of consecutive odd numbers
2 the sum of S is bigger than the sum of T
思路：1、2单独不行 可举例子反驳 1&2 可以
14、a company a product with cost of $c per unit and sell at $b per unit, the fixed cost is 200, if the company sells 200 units, will it gain profit?
1 if company only sold 100 units, there revenue won't cover the costs
2 b>c
思路：100(b-c)-200<0 推不出 200(b-c)和200 的大小关系，2 也推不出
15、x is negative integer, 0<4^x<100, how many x exists?
思路，4的任何负指数得出的值都在0和1之间，x应该有无穷个
16、is x^6>y^6?
1 x^3-y^3>0
2 x^3+y^3.18
不会

逻辑
1 一幅名画家的画被认为是假的，因为在里面发现了一种orange 的类似颜料的物质，经科学研究这种 orange的物质在画家生活的年代很少使用，于是有人认为这幅画是赝品，但是又有人研究发现不可能是赝品。问一下哪一项能解释？
我选的是这幅画在保存过程中有损坏，后人用新的物质来进行了修补
2 一个institution 向government和organizations 分发一种为了促使大家进行energy efficiency 的东东，免费的。但是organization 有权利将它卖给government 当后者不够用的时候。结论说government's funds to energy efficiency transfer to the organization who dose not use the 东东to pursuit energy efficiency. 问能推论出什么？   我选的是至少有一个government 从organizations 那用钱买了东东。  （不是很确定，回忆的也有些模糊，参考一下吧）
3 since more and more customers tend to purchase on line, they concern more about the security if they use the credit cards for the payment. so the issuer of the credit cards offer the service that people need to enter the password of the credit cards while pay things. Which of the followings should occur for the success of the new method?
选项不太记得...记性不是很好...

语法
记忆力差，语法又不好...但是我能记得的考到的点有：并列、主谓一致、比较（no more than）...哎

阅读
惭愧啦，更不记得了。英语还有很多不足，弱点多...有待加强与进步。

cyy鬼鬼

楼主加油！~~~~继续努力！~~~~

滑头鬼

楼主，谢谢你，我也准备考，一起努力吧！

JiCan

加油加油！！