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Determining the authenticity of purported pre-Columbian artifacts is never easy. Carbon-14 dating of these artifacts is often impossible due to contamination by radioactive palladium (which occurs naturally in the soils of Central and South America). However, historians and anthropologists have evolved two reliable criteria, which, utilized in combination, have proven effective for dating these artifacts. First, because authentic pre-Columbian artifacts characteristically occur in a coarse, granular matrix that is shifted by major earthquakes, they often exhibit the unique scratch patterns known as gridding. In addition, true pre-Columbian artifacts show a darkening in surface color that is caused by centuries of exposure to the minute amounts of magnesium in the soil of the Americas.

The criteria above would be LEAST useful in judging the authenticity of which of the following?

正确答案: D

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请教几道逻辑题

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楼主
发表于 2004-2-17 23:38:00 | 只看该作者

请教几道逻辑题

请教以下几道题的解题思路


(1)Are you still reading the other newspaper in town? Did you know that the Daily Bugle is owned by an out-of-town business syndicate that couldn’t care less about the people of ffice:smarttags" />laceName>GothamlaceName> laceType>CitylaceType>? Read the Daily Clarion, the only real voice of the people of laceName>GothamlaceName> laceType>CitylaceType>!fficeffice" />


Which of the following most directly refutes the argument raised in the advertisement above?


(A) Over half of the advertising revenues of the Daily Clarion come from firms whose headquarters are located outside of laceName>GothamlaceName> City.


(B) The Daily Clarion usually devotes more of its pages to out-of-town news than does the Daily Bugle.


(C) Nearly 40 percent of the readers of the Daily Clarion reside outside the limits of Gotham City


(D) The editor-in-chief and all the other members of the editorial staff of the Daily Bugle have lived and worked in Gotham City for ten years or more.(E) The Daily Bugle has been published in Gotham City for a longer time than has the Daily Clarion.


answer: d


(2)In the years since the city of London imposed strict air-pollution regulations on local industry, the number of bird species seen in and around London has increased dramatically. Similar air-pollution rules should be imposed in other major cities.


Each of the following is an assumption made in the argument above EXCEPT:


(A) In most major cities, air-pollution problems are caused almost entirely by local industry


(B) Air-pollution regulations on industry have a significant impact on the quality of the air.


(C) The air-pollution problems of other major cities are basically similar to those once suffered by London.


(D) An increase in the number of bird species in and around a city is desirable.


(E) The increased sightings of bird species in and around London reflect an actual increase in the number of species in the area.


                             answer: a


(3)Determining the authenticity of purported pre-Columbian artifacts is never easy. Carbon-14 dating of these artifacts is often impossible due to contamination by radioactive palladium (which occurs naturally in the soils of Central and South America). However, historians and anthropologists have evolved two reliable criteria, which, utilized in combination, have proven effective for dating these artifacts. First, because authentic pre-Columbian artifacts characteristically occur in a coarse, granular matrix that is shifted by major earthquakes, they often exhibit the unique scratch patterns known as gridding. In addition, true pre-Columbian artifacts show a darkening in surface color that is caused by centuries of exposure to the minute amounts of magnesium in the soil of the Americas.


The criteria above would be LEAST useful in judging the authenticity of which of the following?


(A) An ax head of black obsidian, unearthed from a kitchen midden


(B) A pottery bowl with a red ocher design, found in the ruins of a temple


(C) A set of gold ear weights, ornamented with jasper pendants


(D) A black feather cape from a king’s burial vault


(E) A multicolored woven sash found near the gravesite of a slave


answer:d


    


(4)Dr. A: The new influenza vaccine is useless at best and possibly dangerous. I would never use it on a patient.


Dr. B: But three studies published in the Journal of Medical Associates have rated that vaccine as unusually effective.


Dr. A: The studies must have been faulty because the vaccine is worthless.


In which of the following is the reasoning most similar to that of Dr. A?


(A) Three of my patients have been harmed by that vaccine during the past three weeks, so the vaccine is unsafe.


(B) Jerrold Jersey recommends this milk, and I don’t trust Jerrold Jersey, so I won’t buy this milk.


(C) Wingzz tennis balls perform best because they are far more effective than any other tennis balls.


(D) I’m buying Vim Vitamins. Doctors recommend them more often than they recommend any other vitamins, so Vim Vitamins must be good.


(E) Since University of Muldoon graduates score about 20 percent higher than average on the GMAT, Sheila Lee, a University of Muldoon graduate, will score about 20 percent higher than average when she takes the GMAT.


answer: c

沙发
发表于 2004-2-18 09:29:00 | 只看该作者
1。强调的是所有人和实际的报刊的编辑之间的区别,用了一个转移矛盾的方法使得原文的逻辑被削弱


2。问题处在a的all上,把充分条件当作了必要条件


air-pollution problems are caused almost entirely by local industry

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