请各位高手帮忙看看,是不是答案有问题?尤其是6、7两题 感谢！
The program to control the entry of illegal drugs into the country was a failure in 1987. If the program had been successful, the wholesale price of most illegal drugs would not have dropped substantially in 1987.
6 The argument in the passage would be most seriously weakened if it were true that
(A) in 1987 smugglers of illegal drugs, as a group, had significantly more funds at their disposal than did the country's customs agents
(B) domestic production of illegal drugs increased substantially in 1987
(C) the author's statements were made in order to embarrass the officials responsible for the drug-control program
(D) in 1987 illegal drugs entered the country by a different set of routes than they did in 1986
(E) the country's citizens spent substantially more money on illegal drugs in 1987 than they did in 1986.
7 Many institutions of higher education suffer declining enrollments during periods of economic slowdown. At two-year community colleges, however, enrollment figures boom during these periods when many people have less money and there is more competition for jobs.
Each of the following, if true, helps to explain the enrollment increases in two-year community colleges described above EXCEPT:
(A) During periods of economic slowdown, two-year community colleges are more likely than four-year colleges to prepare their students for the jobs that are still available.
(B) During periods of economic prosperity, graduates of two-year community colleges often continue their studies at four-year colleges.
(C) Tuition at most two-year community colleges is a fraction of that at four-year colleges.
(D) Two-year community colleges devote more resources than do other colleges to attracting those students especially affected by economic slowdowns.
(E) Students at two-year community colleges, but not those at most four-year colleges, can control the cost of their studies by choosing the number of courses they take each term.
Hardin argued that grazing land held in common (that is, open to any user) would always be used less carefully than private grazing land. Each rancher would be tempted to overuse common land because the benefits would accrue to the individual, while the costs of reduced land quality that results from overuse would be spread among all users. But a study comparing 217 million acres of common grazing land with 433 million acres of private grazing land showed that the common land was in better condition.
8 Which of the following, if true and known by the ranchers, would best help explain the results of the study?
(A) With private grazing land, both the costs and the benefits of overuse fall to the individual user.
(B) The cost in reduced land quality that is attributable to any individual user is less easily measured with common land than it is with private land.
(C) An individual who overuses common grazing land might be able to achieve higher returns than other users can, with the result that he or she would obtain a competitive advantage.
(D) If one user of common land overuses it even slightly, the other users are likely to do so even more, with the consequence that the costs to each user outweigh the benefits.
(E)There are more acres of grazing land held privately than there are held in common.
key:AEB |
