请大家在本帖回复：
1. 文章大概结构 2. 自己写的答案
解析+文章翻译明晚微信群里公布
报名活动，加微信号killgmat
1.Every fall Croton's jays migrate south. The jays always join flocks of migrating crookbeaks with which they share the same summer and winter territories. If a jay becomes separated from the crookbeaks it is accompanying, it wanders until it comes across another flock of crookbeaks. Clearly, therefore, Croton's jays lack the navigational ability to find their way south on their own. Which of the following, if true, most seriously weakens the argument? A. Migrating flocks of crookbeaks display no aggression when Croton's jays attempt to join them. B. The three species most closely related to Croton's jays do not migrate at all. C. Species other than Croton s jays occasionally accompany flocks of migrating crookbeaks. D. Croton’s jays lay their eggs in the nests of crookbeaks, which breed and build their nests upon reaching their southern destinations. E. Migrating crookbeaks derive some protection from hawks because of the presence of the larger and more aggressive Croton's jays in their flocks.
2.Motor vehicles can be powered by many technically feasible alternatives to the traditional petroleum-based fuels produced by the established oil producers. However, these alternatives are at present somewhat too expensive to compete effectively with those traditional fuels. It follows that established oil producers whose goal is to continue to maximize their share of the total global energy market entirely through sales of traditional petroleum products should______ Which of the following most logically completes the argument above? A. invest a larger proportion of their profits to enhance the efficiency of alternative energy sources B. convince automakers to manufacture smaller, less expensive new cars that will be affordable for more people C. exercise caution when they raise prices in response to increased demand for their products D. seek arrangements with other oil producers to prevent excess inventories of oil by-products E. direct their marketing efforts toward those countries in which the alternative means of powering motor vehicles are least popular
参考答案： DC
| 
京公网安备11010202008513号 京ICP证101109号 京ICP备12012021号
发表于 2021-6-28 02:08:41
收藏
收藏
