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我又不会做了,麻烦大家帮我看看吧

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楼主
发表于 2004-6-23 18:45:00 | 显示全部楼层

我又不会做了,麻烦大家帮我看看吧

22. If p,q,r, and s are nonzero numbers, is
(p – 1)(q - 2)2(r – 3)3(s – 4)4 ≧ 0?


(1) q > 2 and s > 4


(2) p > 1 and r > 3


为什么这题不是选C,而选B呢?


24. All trainees in a certain aviator training program must take both a written test and a flight test. If 70 percent of the trainees passed the written test, and 80 percent of the trainees passed the flight test, what percent of the trainees passed both tests?


(1) 10 percent of the trainees did not pass either test.


(2) 20 percent of the trainees passed only the flight test.


这题也不会做555...大家能告诉我详细的解题思路么?


9. Of the 230 single-family homes built in City X last year, how many were occupied at the end of the year?


(1) Of all single-family homes in City X, 90 percent were occupied at the end of last year.


(2) A total of 7,200 single-family homes in City X were occupied at the end of last year.


这题为啥选C?230在题目中起了什么作用?



还顺便问一句,是不是0也是偶数?


劳驾大侠们看看,深深地表示感谢!


沙发
 楼主| 发表于 2004-6-23 22:05:00 | 显示全部楼层

lwei1016大侠,谢谢您的详细指点,我已经明白了.

22题我太不仔细了,奇数次方是有可能为负数的,呵呵......

24题我也想过您说的解题思路,可是我总是喜欢把问题想得很复杂, 后来都变糊涂了555......

9题还是不太明白230在题目中起什么作用

in summary, thanks a lot to lwei1016 gg

板凳
 楼主| 发表于 2004-6-24 14:47:00 | 显示全部楼层

第九题我也认为选E的,可是看了答案就让我没信心了.不知道是不是答案错了, mariezhu 妹妹讲的我也考虑过.谢谢大家帮我解惑


by the way, 不好意思再开新贴,借宝地再问一题(快考试了,心情比较急切,请大家原谅......)


23. The participants in a race consisted of 3 teams with 3 runners on each team. A team was awarded 6 –n points if one of its runners finished in nth place, where 1 £ n £ 5. If all of the runners finished the race and if there were no ties, was each team awarded at least one point?


(1) No team was awarded more than a total of 6 points.


(2) No pair of teammates finished in consecutive places among the top five places.


这题我没明白它的意思,好心的同胞们麻烦您细细看看咯.答案是选A.


[此贴子已经被作者于2004-6-24 14:51:08编辑过]
地板
 楼主| 发表于 2004-6-26 09:03:00 | 显示全部楼层
og的83题,我去查查!谢谢mianmian MM
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