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1. Critics of certainpollution-control regulations have claimed that the money spent over thelast decade in order to reduce emissions of carbon monoxide and of volatileorganic compounds has been wasted. The evidence they offer in support of this claim might appearcompelling: despite the money spent,annual emissions of these pollutants have been increasing steadily. This evidence is far from adequate, however,since over the last decade a substantial number of new industrial facilitiesthat emit these pollutants have been built. In the reasoning given, thetwo portions in boldface play which of the following roles? Answer: The first is aposition that the reasoning contends is inadequately supported by the evidence;the second is evidence used to support the reasoning’s contention. 2. One of the limiting factors in human physicalperformance is the amount of oxygen that is absorbed by the muscles from thebloodstream. Accordingly, entrepreneurs have begun selling at gymnasiums andhealth clubs bottles of drinking water, labeled “SuperOXY,” that has extraoxygen dissolved in the water. Such water would be useless in improving physicalperformance, however, since the only wayto get oxygen into the bloodstream so that it can be absorbed bye the musclesis through the lungs. Which of the following, if true, would serve the samefunction in the argument as the statement in boldface? Answer: theamount of oxygen in the blood of people who are exercising is already more thanthe muscle can absorb 3. In 1960’s studies of rats, scientists found thatcrowding increases the number of attacks among the animals significantly. Butin recent experiments in which Rhesus monkeys were placed in crowdedconditions, although there was an increase in instances of “coping” behavior –such as submissive gestures and avoidance of dominant individuals – attacks didnot become any more frequent. Therefore it is not likely that, for any speciesof monkey, crowding increases aggression as significantly as was seen in rats.
Which ofthe following, if true, most strengthens the argument?
Answer:Rhesus monkeys respond with aggression to awider range of stimuli than any other monkeys do. 4. Thechemical adenosine is released by brain cells when those cells are active. Adenosinethen binds to more and more sites on cells in certain areas of the brain,as the total amount released gradually increases during wakefulness. Duringsleep, the number of sites to which adenosine is bound decreases. Some researchershave hypothesized that it is the cumulative binding of adenosine to a largenumber of sites that causes the onset of sleep. Whichof the following, if true, provides the most support for the researchers’ hypothesis? Answer: Caffeine, which has the effect of making people remain wakeful, isknown to interfere with the binding of adenosine to sites on brain cells. AA Forcomputer companies, if introduce the most powerful and advanced informationtechnology, the employee productivity will be increased. Therefore, if ourcomputer company introduce the most powerful and advanced informationtechnology, every single dollar which spent on investing the technology willincrease our company's profit margins. |
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