【求证3道逻辑题的答案哦~】

jeffery2541

题目分别如下：

1`The total market value of real estate in Altonville has steadily declined over the past four years. This decline has meant that the overall figure on which the city’s property tax is based—the assessed value of that real estate—has also declined. The percentage of assessed value that was paid as property taxes to the city, however, did not change from year to year during this period.
The information above most strongly supports which of the following?

A.The percentage of Altonville’s yearly revenue that comes from money collected in property taxes did not change over the past four years.
B.The percentage of Altonville’s yearly revenue that comes from money collected in property taxes has declined steadily over the past four years.
C.The amount of revenue that Altonville collected from property taxes was lower last year than it was four years ago.
D.During the past four years, Altonville officials increased tax rates on other sources of revenue such as retail sales and business profits.
E.Altonville will soon require property owners to pay a higher percentage of the assessed value of their property as property tax.


2`A medieval manuscript called L contains all eighteen extant tragedies by the Greek playwright Euripides. Of these, ten called the “select plays,” are accompanied in L by ancient commentaries and also appear in other medieval manuscripts; this group includes some of Euripides’ best-known works, including the Medea. The other eight, which appear in alphabetical order, without commentary. The Electra is one of the alphabeticals.
Which of the following can be reliably concluded on the basis of the Statements given?

A.Only Euripides’ best-known works are accompanied by ancient commentaries in extant medieval manuscripts.
B.The select plays are accompanied by ancient commentaries because they were the best known of Euripides’ works.
C.No commentaries were written about Euripides’ Electra in ancient times.
D.Euripides’ Medea never appears in medieval manuscripts
unaccompanied by ancient commentary.
E.Euripides’ Electra does not appear accompanied by a com-mentary in any extant medieval manuscript.


3`In Patton City, days are categorized as having heavy rainfall (more than two inches), moderate rainfall (more than one inch, but no more than two inches), light rainfall (at least a trace, but no more than one inch), or no rainfall. In 1990, there were fewer days with light rainfall than in 1910 and fewer with moderate rainfall, yet total rainfall for the year was 20 percent higher in 1990 than in 1910.
If the statements above are true, then it is also possible that in Patton City

A.the number of days with heavy rainfall was lower in 1990 than in 1910
B.the number of days with some rainfall, but no more than two inches, was the same in 1990 as in 1910
C.the number of days with some rainfall, but no more than two inches, was higher in 1990 than in 1910
D.the total number of inches of rain that fell on days with moderate rainfall in 1990 was more than twice what it had been in 1910
E.the average amount of rainfall per month was lower in 1990 than in 1910

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给出的答案是CEA，我的答案是EBD。大家的呢？

pinkking

CDA。其他两道无意见。但是第二道完全不能理解……所以我只能讲解其他两道

pinkking

第一道和第三道都是计算题，建议楼主列出式子。

看楼主选了E，那是过度推断了。为啥政府一定会多征收呢？原文没有任何信息证明这一点啊。做逻辑题时候要方舟子一点，质疑质疑质疑

pinkking

第三题D是绝对错误的，题目已经说了90年降雨天数无论是L还是M的都比94年少，就算你取上极值，比如说90年所有降雨量都是1.9，然后10年是1.1，那么也是不可能比10年多出两倍多来的。比如天数前者是X，后者是Y，那么就是1.9X>1.1*2*Y，同事X<Y，这是不成立的。

注意第三题题目问的是可能。那么A就可能。因为暴雨雨量无上限，所以可以尽情取值，不用考虑天数

jeffery2541

第一道和第三道都是计算题，建议楼主列出式子。

看楼主选了E，那是过度推断了。为啥政府一定会多征收呢？原文没有任何信息证明这一点啊。做逻辑题时候要方舟子一点，质疑质疑质疑

-- by 会员 pinkking (2012/8/8 23:14:59)

怎么个计算法呢？继续求教啊~~~

pinkking

Anyhow, let me hopefully clear things up a little.

We know that:

the "select plays" in 'L' are accompanied by commentaries
the "select plays" are ALSO found in other manuscripts.
the "select plays" contain SOME of Euripides' best known plays.
Medea is a "select play."


Now for the "other eight," which are in contrast to the "select plays."

We know the "other eight" do not include commentary.
We know the "other eight" appear in alphabetical order. (Suggesting that the "select plays" are not in alphabetical order).
Electra is an "alphabetical." -------> Electra does not include commentary

Now there is one little step. Notice how the "select plays" differ from "the alphabeticals" in that they are ALSO found in other medieval manuscripts. Therefore the "other eight" are not found in medieval manuscripts ------> Electra does not appear in other ancient manuscripts. The only manuscript it does appear in it is not accompanied by commentary. Thus (E).

For (D), we know Medea appears in other medieval manuscripts. We do not know whether these manuscripts have commentary.

For (B), we do not know for certain why the "select plays" had commentaries. Commonsense tells us that it was probably because they were Euripides' best known work. However, based on the argument, we cannot logically conclude that.

Hope that was helpful Smile.

pinkking

第一道和第三道都是计算题，建议楼主列出式子。

看楼主选了E，那是过度推断了。为啥政府一定会多征收呢？原文没有任何信息证明这一点啊。做逻辑题时候要方舟子一点，质疑质疑质疑

-- by 会员 pinkking (2012/8/8 23:14:59)

假设地产价值过去是a，现在是b，那么根据题意B<A；然后征的税也是下降啦，但是地产征税比例不变，还是X。那么四年前的征税数额是AX，现在是BX，那么BX肯定小于AX


怎么个计算法呢？继续求教啊~~~

-- by 会员 jeffery2541 (2012/8/8 23:21:13)

jeffery2541

第三题D是绝对错误的，题目已经说了90年降雨天数无论是L还是M的都比94年少，就算你取上极值，比如说90年所有降雨量都是1.9，然后10年是1.1，那么也是不可能比10年多出两倍多来的。比如天数前者是X，后者是Y，那么就是1.9X>1.1*2*Y，同事X<Y，这是不成立的。

注意第三题题目问的是可能。那么A就可能。因为暴雨雨量无上限，所以可以尽情取值，不用考虑天数

-- by 会员 pinkking (2012/8/8 23:19:35)

我得好好看看这样的题目了~谢谢咯~

miffyhui

上面题2信息好多，看第一遍什么都没理清，想问下，这种题目看的时候要不要边在纸上做笔记
感觉不做笔记，理不清。但是写笔记好花时间的，各种纠结~
平时做完题目，分析的时候才写写思路，写题的时候还是混乱

pinkking

上面题2信息好多，看第一遍什么都没理清，想问下，这种题目看的时候要不要边在纸上做笔记
感觉不做笔记，理不清。但是写笔记好花时间的，各种纠结~
平时做完题目，分析的时候才写写思路，写题的时候还是混乱

-- by 会员 miffyhui (2012/8/10 18:26:27)

我比较不擅长这类问题，所以我会记