几道逻辑题望各位大牛指点

harvard2012 · 发表于 2012-2-16 14:06:25

1. the availability of high-quality electronic scanners and color printers for computers has made the counterfeiting of checks much easier. for the purpose of deterring such counterfeiting, some banks plan to issue to tehir coporate customers checks that contain dots too small to be accurately replicated by any electronic scanner available at present; when such checkss are scanned and printed, the dots seem to blend together in such a way that the word" VOID" apperas on the check.
(C) the smallest dots on the proposed checks cannot be distinguished visually except under strong magnification
(E) the size of the smallest dots that generally available electronic scanners are able to areporduce accurately will not decrease significantly in the near future
正确答案选E，我选C，怎么也想不通啊

2. the earth's rivers regularlyh carry dissolved salts into its oceans. clearly, thus, by taking the resulting increase in salt levels in the oceans over the past thousand years and then verifying how many centuries of such increases it would have taken the oceans to reach current salt levels from a theoretical initial salt-free state, the maximum age of the Earth's oceans can be accurately estimated.
(A) the quantities of dissolved salt deposited by rivers in the Earth's oveans have not been unusually large during the past thousand years.
(E) None of the salts carried into the Earth's oceans by rivers are used up by biological activity in the oceans.
正确答案是A，我选E，为啥不对啊

3. for the most people, the left half of the brain controls linguistic capabilities. However, some people have their language cneters in the right half. whne a language center of the brains is impaired, for example, by a stroke, linguistic capabilities are damaged in some way. So, people who have suffered a serious stroke on the left side of the brain without suffering any such impairment must have their language cneters in the right half.
(B) impairment of linguistic capabilities does not occur in people who have not suffered any damage to any language cneter of the brain.
(D) if there are language centers on the left side of the brain, any serious stroke affecting that side of the brain damages at least one of them.
正确答案是B，我选D，其实我完全没有想明白啊

4. a recent report determined that although only 3 percent of drivers on Maryland highways equipped their vehicles with radar detectors, 33 percent of all vehicles ticketed for exceeding the speed limit were equipped with them. clearly, drivers who equip their vehicles with radar detectors are more llikely to exceed the speed limit regularly than are drivers who do not.
(B) Drivers who are ticketed for exceeding the speed limit are more likely to exceed the speed limit regularly than are drivers who are not ticketed.
(C) the number of vehicles that were ticketed for exceeding the speed limit was greater than the number of vehivles that were equipped with radar detectors.
正确答案是B，我选C，完全没有想明白

5. although the ratio of physicians to total population is about the same in the US and Canada, the united States has 33 percent more surgeons per capita. clearly, this is the reason people in the US undergo 40% more operations per capita than do Canadians.
( A) patients in the US do not have a greater need for surgery than do patients in Canada
(B) the population of the US is not larger than that of Canada.
正确是A，我选B，为啥啊

6. America manufactureres currently produce most of the world's soar-power generators - most of which are exported to africa. but afircan manufacturers are emerging and possibly will ultimately capture much of the african market. america administration is funding initiatives intended to promote use of solar power within the america. if these initiatives succeed in increasing the demand for solar-power generators in the america, america manugacturers will probably maintain significant production levels, because ( )
(C) just as african manufacturers enjoy vertain competitive advantages in africa, so do america manufacturers in the america
(E) the current market for solar-power gerators in the america is very limited
正确答案是C，我选E，是不是E，如果是AFRICA 就对了呢

7. using new detection techniques, investigators have found trace amounts of different. medicinal substances in lakes and rivers. taken in enormous quantities, these substances could have serious health effects, but they are demonstrated in quantities far too low to cause any physiological response in people who drink the water or bathe in it. However, medical experts contend that eliminating these trace amounts from the water will have public health benefits, since ( )
(B)soe of the medicinal substances found in lakes adn rivers can counteract possible harmful effects of other such substances found there
(E) disease-causing bacteria exposed to low concentrations of vertain medicinal substances can become resistant to them
正确为E，我选B，不明白E中resistant to them，指的是神马

sdcar2010 · 发表于 2012-2-19 09:44:25

You can search key words from your listed questions in this forum. I believe that most of them have been discussed many times . . .

harvard2012 · 发表于 2012-2-22 15:58:15

请大牛指导如何搜索啊

几道逻辑题望各位大牛指点

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