tania的考试复习计划贴：谢谢大家的帮助和支持！！M51,V41,760!

vacationer

99. 2^100+3^101+4^102的个位数是多少

就是求除以十的余数，各位兄弟姐妹们不了解同余概念的可以背答案，答案是5，放心不会错的

这个是怎么算的呢?

AegeanSea2006

以下是引用vacationer在2005-9-16 23:18:00的发言：

99. 2^100+3^101+4^102的个位数是多少

就是求除以十的余数，各位兄弟姐妹们不了解同余概念的可以背答案，答案是5，放心不会错的

这个是怎么算的呢?

2^n个位数的规律是2(2^1),4(2^2),8(2^3),6(2^4)，接下来依次循环，那么n=100时，个位刚好应该是 6

同理，3^n个位数的规律是3,9,7,1,当n=101时，个位应是 3

4^n各位数规律是4,6,当n=102时，个位应该是 6

把这三个个位相加 6+3+6=15，那么个位数就是 5

[此贴子已经被作者于2005-9-16 23:52:56编辑过]

vacationer

以下是引用AegeanSea2006在2005-9-16 23:52:00的发言：

2^n个位数的规律是2(2^1),4(2^2),8(2^3),6(2^4)，接下来依次循环，那么n=100时，个位刚好应该是 6

同理，3^n个位数的规律是3,9,7,1,当n=101时，个位应是 3

4^n各位数规律是4,6,当n=102时，个位应该是 6

把这三个个位相加 6+3+6=15，那么个位数就是 5

  

很清楚,我明白了. 西西,再次感谢

面对沧海，一声笑

坚持就是胜利，真有道理。

babypace

GWD-7-40:

Since February, the Federal Reserve has raised its short-term interest rate target five times, and because of the economy’s continued strength, analysts have been predicting for weeks that the target will be raised again in November.

because of the economy’s continued strength, analysts have been predicting for weeks that the target will

with the economy’s strength continuing, analysts predicted for weeks that the target

because the economy continues strong, analysts predicted for weeks that the target would

due to the economy’s continued strength, analysts have been predicting for weeks that the target

due to the fact of the economy’s continued strength, analysts predicted for weeks that the target will
这道题大家选什么？？我选A

我也选了A的，但是网上倾向于C。 我的疑问：C里面的continues后面可以直接用strong这个形容词吗？我的语感老是觉得应该是continues to be strong。但是A的because of不算是ETS prefer的一种形态。除此之外，economy's strength我觉得没有问题，后面的时态也可以的。will感觉比would要好些。

wwwhahchn

以下是引用vacationer在2005-9-15 9:17:00的发言：

刚才总结GWD的CR,发现这道没有答案,真奇怪.

GWD-9-Q13:

Fact: Asthma, a bronchial condition, is much less common ailment than hay fever, an allergic inflammation of the nasal passages.

Fact: over 95 percent of people who have asthma also suffer from hay fever.

If the information given as facts above is true, which of the following must also be true?

1. Hay fever is a prerequisite for the development of asthma
   
   



2. Asthma is a prerequisite for the development of hay fever
   
   



3. Those who have neither hay fever nor asthma comprise less than 5 percent of the total population
   
   



4. The number of people who have both of these ailments is greater than the number of people who have only one of them
   
   



5. The percentage of people suffering from hay fever who also have asthma is lower than 95 percent.
   
   

发言错误，先删掉

[此贴子已经被作者于2005-9-17 13:23:51编辑过]

wwwhahchn

以下是引用babypace在2005-9-17 9:40:00的发言：

A

我也选了A的，但是网上倾向于C。 我的疑问：C里面的continues后面可以直接用strong这个形容词吗？我的语感老是觉得应该是continues to be strong。但是A的because of不算是ETS prefer的一种形态。除此之外，economy's strength我觉得没有问题，后面的时态也可以的。will感觉比would要好些。

还是同意A，because of economy's continued strength表意清楚，并不是那种because of+复杂结构的情况，而且C的过去时不好

continue应该可以直接加a.的

tania

以下是引用vacationer在2005-9-15 9:17:00的发言：

刚才总结GWD的CR,发现这道没有答案,真奇怪.

GWD-9-Q13:

Fact: Asthma, a bronchial condition, is much less common ailment than hay fever, an allergic inflammation of the nasal passages.

Fact: over 95 percent of people who have asthma also suffer from hay fever.

If the information given as facts above is true, which of the following must also be true?

1. Hay fever is a prerequisite for the development of asthma
   
   
   
   
2. Asthma is a prerequisite for the development of hay fever
   
   
   
   
3. Those who have neither hay fever nor asthma comprise less than 5 percent of the total population
   
   
   
   
4. The number of people who have both of these ailments is greater than the number of people who have only one of them
   
   
   
   
5. The percentage of people suffering from hay fever who also have asthma is lower than 95 percent.
   
   

D，肯定

我怎么觉得都不对啊？？

A、B、C不说了，肯定不对

D有问题，因为题干中说Asthma的人数少于hay fever（事实1），A里面超过95％的人也得了H（事实2）

相当于两者的交集是A的95％。我们可以假设A有100人，B有1000人，也就是说只能从事实中推出至少有95个人得了两种病，得一种病的人是5＋1000－95＝910人，所以不能得出D的推论。

E也有问题，如果事实2说至多95％的人得了两种病，那么E是可以的，因为h比A人多，A里面的95％得了两种病，所以H里面就应该少于95％的人得两种病，因为分母大了；可是提干说的是A里面有多于95％的人得两种病，举个极端的例子，A有100人，全得了两种病，H有102人，那么100/102>95％，所以也得不出E结论。

困惑中，觉得题目有问题

tania

今早模考了pp3，按时写了两篇作文，就按照pp3随机挑得两篇，不知是不是简单，总之AA写了435字，AI写了395字，给了我很大信心哦，继续背模板！！

tania

在看04年9月cr jj ,发现这道题跟上面那个有些类似，大家讨论

63. 得哮喘的人中，超过95％还得另外一种病P。但是得P的人中，又得了哮喘的比例将低于95％，因为_______  这题有点搞，我可能是选错了。选项有：哮喘比P更普遍；哮喘比P更严重；得了两种病的人比只得一种病的人数量要大……

我觉得是不是可以这样理解,设交叉部分为A，列式如下：A/哮喘>95%；A/P<95%

由一式得，哮喘<A/95％；由二式得，P>A/95%;所以推出哮喘<,正确选项应该是P比哮喘更普遍