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[转帖]2.25 北美JJ 770

770,M 50,V45

首先我得感谢CD和CD里的所有热心的朋友的JJ贡献. 我只看过OG和XDF的材料,感觉VERBAL 部分OG特别重要,一定要每个解释都看懂. 惭愧的是我到现在也不知道到底什么是GWD. MATH 部分XDF的题很管用,再就是CD的JJ. 我碰到Math十多题JJ, 相反,VERBAL JJ并不多见,我能记得的也就是墨西哥人水权的那篇阅读.

OK, 以下是我能记住的JJ:

MATH:

1.根号(2根号63 + 2/(8+3根号7)) 记得63=7X9

2.给一个BAR 图表,算MEDIAN 老JJ了

3.1/X,X,X2, 那个最小, 1)X>0 2) X<1, 注意和老JJ不同

4.RP2 的因子个数.

5. 一个数列,A3=A2+A1, AN=P,问AN+2, 应该是4P

6.|X|<5? 1) X<5,2)X>-10, 应该是E

7.CHILDREN:MEN::WOMEN 比例5:2:7 问有多少MEN: 1)12个CHILD+WOMEN 2) < 4 MEN(可能不准,参考以往JJ)

8. 999992 -1

9. Y=根号3X 只有一对整数解.

10. 一公司, START $10,000第一年PROFIT 张X PERCENT,第二年YPERCENT 问第二年的PROFIT. 1) X+Y = ?? 2) (1+X/100)(1+Y/100)=6 选B

11. 还有几个简单的PROBABALITY的,都是简单的组合问题.

Sorry that I will just type English for Verbal section:

SC: there are a lot of parallalism, including sentence, present and past participle.

rather than..., not only ... but also...

RC: 1. Spanish and Mexican in the southwestern water rights. I am not sure if this is the same since all the old JJ mention Black water rights. Basically, it critics the new law give exclusive water rights to municipities instead of sharing.

2. Analysis of two sales methods: top down and bottom up. Final conclusion, bottom up might not be trustworthy and not supported by other psychological or some sort of analysis.

3. Salmon habitat change because of human activity. Talked about their stray into other rivers because of pollution. Used a nature occuring event to explain the human activity. One last question ask why human activity will cause the same result as Mt. St Helen's volcanic destruction. The answer should be the author couldn't think any reason that they are different.

4. Described brokerage deregulation and it's effect. There are cheaper brokerage firms targeting individuals after the deregulation.

CR, there are a lot of CR questions, more than I think I should have:

1. A certain vaccine, wouldn't cause adult monkey disease but will cause adolesent monkey disease in six month. Conclusion is it is safe on human adults since they behave the same. ask assumption. I chose the disease will show in six month or not showing at all.

2. New method to measure water in snow. Using radiation emit from snow can used to detect thickness of snow and water in it. Old method being physically test the thickness by human being ( something like that). ask weakness of new method. I chose sometimes snow is too thick that there is no radiation at all.

3.Woodcraft machine first appeared in US because the labor shortage. The author said not only because of that, the other reason is that there are a lot more wood to process in US. then ask support. I chose more wood require better machine since handcraft is not fast enough to process vast wood.

4. A newspaper print paper price will increase. The newspaper propose to reduce the published pages to maintain cost. ask support. I think I chose people wouldn't dislike the small font.

Once again, thanks everyone here. Remember OG is very useful!!!! and CD rules!!!

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It is not only a test! It is Beyond GMAT!
Robert Zhou
http://weibo.com/irobert

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