A.Commercial airliners are already required by law to be equipped with extremely sophisticated radar systems.
B.Centrally located airports are experiencing overcrowded airspace primarily because of sharp increases in commercial-airline traffic.
C.Many pilots of private planes would rather buy radar equipment than be excluded from centrally located airports.
D.The number of midair collisions that occur near centrally located airports has decreased in recent years.
E.Private planes not equipped with radar systems cause a disproportionately large number of midair collisions around centrally located airports.
第1题
esponding surge in claims against companies underwriting satellite insurance. As a result, insurance premiums shot up, making satellites more expensive to launch and operate. This, in turn, has added to the pressure to squeeze more performance out of currently operating satellites. Which of the following, if true, taken together with the information above, best supports the conclusion that the cost of television satellites will continue to increase?
A.Since the risk to insurers of satellites is spread over relatively few units, insurance premiums are necessarily very high.
B.When satellites reach orbit and then fail, the causes of failure are generally impossible to pinpoint with confidence.
C.The greater the performance demands placed on satellites, the more frequently those satellites break down.
D.Most satellites are produced in such small numbers that no economies of scale can be realized.
E.Since many satellites are built by unwieldy international consortia, inefficiencies are inevitable.
第2题
specially one without a signature or with a questionably authentic signature, is indubitably the work of this or that particular artist. This fact gives the traditional attribution of a disputed painting special weight, since that attribution carries the presumption of historical continuity. Consequently, an art historian arguing for a deattribution will generally convince other art historians only if he or she can persuasively argue for a specific reattribution. Which one of the following, if true, most strongly supports the position that the traditional attribution of a disputed painting should not have special weight?
A.Art dealers have always been led by economic self-interest to attribute any unsigned paintings of merit to recognized masters rather than to obscure artists.
B.When a painting is originally created, there are invariably at least some eyewitnesses who see the artist at work, and thus questions of correct attribution cannot arise at that time.
C.There are not always clearly discernible differences between the occasional inferior work produced by a master and the very best work produced by a lesser talent.
D.Attribution can shape perception inasmuch as certain features that would count as marks of greatness in a master"s work would be counted as signs of inferior artistry if a work were attributed to a minor artist.
E.Even though some masters had specialists assist them with certain detail work, such as depicting lace, the resulting works are properly attributed to the masters alone.
第3题
ing the acts standards for automobile emissions was neither economically feasible nor environmentally necessary. However, the catalytic converter, invented in 1967, enable automakers to meet the 1970 standards efficiently. Currently, automakers are lobbying against the governments attempt to pass legislation that would tighten restrictions on automobile emissions. The automakers contend that these new restrictions would be overly expensive and unnecessary to efforts to curb air pollution. Clearly, the automobile industrys position should not be heeded. Which one of the following, if true, lends the most support to the automakers current position?
A.The more stringent the legislation restricting emissions becomes, the more difficult it becomes for automakers to provide the required technology economically.
B.Emissions-restriction technology can often be engineered so as to avoid reducing the efficiency with which an automobile uses fuel.
C.Not every new piece of legislation restricting emissions requires new automotive technology in order for automakers to comply with it.
D.The more automobiles there are on the road, the more stringent emission restrictions must be to prevent increased overall air pollution.
E.Unless forced to do so by the government, automakers rarely make changes in automotive technology that is not related to profitability.
第4题
ll bits of plastic bound together by a degradable bonding agent such as cornstarch. Since only the bonding agent degrades, leaving the small bits of plastic, no less plastic refuse per container is produced when such containers are discarded than when comparable nonbiodegradable containers are discarded. Which of the following, if true, most strengthens the argument above?
A.Both partially biodegradable and nonbiodegradable plastic beverage containers can be crushed completely flat by refuse compactors.
B.The partially biodegradable plastic beverage containers are made with more plastic than comparable nonbiodegradable ones in order to compensate for the weakening effect of the bounding agents.
C.Many consumers are ecology-minded and prefer to buy a product sold in the partially biodegradable plastic beverage containers rather than in nonbiodegradable containers, even if the price is higher.
D.The manufacturing process for the partially biodegradable plastic beverage containers results in less plastic waste than the manufacturing process for nonbiodegradable plastic beverage containers.
E.Technologica" problems with recycling currently prevent the reuse as food or beverage containers of the plastic from either type of plastic beverage container.
第5题
aintains feeding behavior. Only when a caterpillar has grown to the right size for pupation to take place does a special enzyme halt the production of juvenile hormone. This enzyme can be synthesized and will, on being ingested by immature caterpillars, kill them by stopping them from feeding. Which of the following, if true, most strongly supports the view that it would not be advisable to try to eradicate agricultural pests that go through a caterpillar stage by spraying croplands with the enzyme mentioned above?
A.Most species of caterpillar are subject to some natural predation.
B.Many agricultural pests do not go through a caterpillar stage.
C.Many agriculturally beneficial insects go through a caterpillar stage.
D.Since caterpillars of different species emerge at different times, several sprayings would be necessary.
E.Although the enzyme has been synthesized in the laboratory, no large-scale production facilities exist as yet.
第6题
ribed as one of
A.respectful regard.
B.qualified approbation.
C.implied skepticism.
D.pointed criticism.
E.fervent advocacy.
第7题
hypotheses about what would happen when they fed large amounts of protein to rats?
A.The rats " brain serotonin levels would not decrease.
B.The rats" brain tryptophan levels would decrease.
C.The rats" tyrosine levels would increase less quickly than would their leucine levels.
D.The rats would produce more insulin.
E.The rats would produce neurotransmitters other than serotonin.
第8题
o an injection of
A.tyrosine.
B.leucine.
C.blood.
D.tryptophan.
E.protein.
第9题
hat techniques have industrialists used to manipulate a free market? II . In what ways are "New World" and " Old World " economic policies similar? III. Has economic policy in the United States tended to reward independent action?
A.I only
B.II only
C.III only
D.I and II only
E.II and III only
第10题
ng the 1980s?
A.Their jobs frequently led to permanent positions within firms.
B.They constituted a less demographically diverse group than has been suggested.
C.They were occasionally involved in actions organized by labor unions.
D.Their pay declined during the decade in comparison with the pay of permanent employees.
E.They did not necessarily prefer temporary employment to permanent employment .
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