1。解释：
the population of elephant seals, reducede by hunting to perhaps a few dozen animals early in this century, has soared under fedreral protection during the lasr few decades . howerver, because the species repopulated itself throuth extensive inbreeding . it now exhibits a genetic uniformity that is almost unparaleled in other speciess of mamals , and thus it is in far greater danger of becoming extinct than are most other species.
Which of the following is most likely the reason that other species of mammals are less likely than elephant seals to become extinct?
A. other species of mamals have large populations, so the loss of few members of the species is not important.
B. other species of mammals have increased their knowlede of dangers though the experince of ganeration after generation of animals
C. in other species of mamals , hunters can reaily distingush between males and females or between young animals and adults.
D. in other species of mamals , some members of the species are gentically better equipped to withstand a decease or evernt that destroys other members of the species
E. other species of mammals have retained hatbits of caution and alertness because they ahve not been protected as endangered species
我觉得是D,:原文说虽然es受保护，但是由于近亲繁殖导致gene uniformity, 所以比其他动物更容易灭绝。 选项中只有D解释的原因是与遗传相关的， 而其他选项解释的理由不是 habbits 就是外部条件（hunter )
2. 削弱
the excessive number of safety regulations that the federal government has placed on industry posed more serious hardships for big businesses than for small ones . since large companies do everything on a mor massive scale, they must alter more cmplex operation s and spend much more monery to meet government requirements
which of the following , if true , would most weaken the argument above?!
A. small companies are less likely than large comapanies to have the capital reserve for improvement
C. safety regulation codes are uniform, established without rference to size of company.
A和C 哪个好，为什么阿？！
3。削弱
the county of M has severe air pollution,80 percent of which is caused by the exhaust fumes of cars, In order to reduce the number of cars on the road, the government is raising taxes on the coat of buying and running a car by 20 percent . the tax inveease , therrefore will significantly reduce air pollution in M.
A. the government of M is in the process of building a significant number of roadways
B. M is an oil-producing country and is able to refine an amount of gasoline sufficient for the needs of it pollution
C, M has had an excellent public transportation system for many years.
D. Ninety pecent of the population of M is very properous and has a substantial amount of disposable income.
E. in M , cars that emit relatively law levels of pollutions cost 10 percent less to oerate ,on average, than do cars that emit high levels of population
原文的推导是 提高开销--〉车辆减少----〉污染下降
D说，大家都有的是钱，如此则涨钱没影响了，攻击第一步推导。 不过觉得不是非常的好
E. 我看不出来是什么意思，是否无关呢，大家说说！
第一题你是什么问题啊？我也觉得选D。
第二题，结论： more serious hardships for big businesses than for small ones 。 weaken就要说small businesses have more hardship。即如A所说，选A。
第三题，E是无关.
另外，这些题都可以在逻辑大全中找到，不用自己这么费劲的往里输入．
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