CR JJ
53.13 Capuchin monkeys often rub their bodies with a certain type of millipede. Laboratory tests show that secretions from the bodies of these millipedes are rich in two chemicals that are potent mosquito repellents, and mosquitoes carry parasites that debilitate capuchins. Some scientists hypothesize that the monkeys rub their bodies with the millipedes because doing so helps protect them from mosquitoes.
Which of the following, if true, provides the most support for the scientists’ hypothesis?
- A single millipede often gets passed around among several capuchins, all of whom rub their bodies with it.
- The two chemicals that repel mosquitoes also repel several other varieties of insects.
- The capuchins rarely rub their bodies with the millipedes except during the rainy season, when mosquito populations are at their peak.
- Although the capuchins eat several species of insects, they do not eat the type of millipede they use to rub their bodies.
- The two insect-repelling chemicals in the secretions of the millipedes are carcinogenic for humans but do not appear to be carcinogenic for capuchins.
但是选项做了修改,正确选项C没有了,改成了一个非常模糊的选项。
我选的答案是:
chemicals that are potent mosquito repellents这种物质唯一可以获得的时间是在rainy season
2. GWD垃圾处理烧成灰那道,没修改
3.GWD变体,第一个bold face与原来不一样了 Environmental organizations want to preserve the land surrounding the Wilgrinn Wilderness Area from residential development. They plan to do this by purchasing that land from the farmers who own it. That plan is ill-conceived: if the farmers did sell their land, they would sell it to the highest bidder, and developers would outbid any other bidders. On the other hand, these farmers will never actually sell any of the land, provided that farming it remains viable. But farming will not remain viable if the farms are left unmodernized, and most of the farmers lack the financial resources modernization requires. And that is exactly why a more sensible preservation strategy would be to assist the farmers to modernize their farms to the extent needed to maintain viability.
Answer: 1st boldface support a strategy; 2nd boldface to support a different strategy.
4. Politician: 对那些乱在公共的property乱倒垃圾的人处以罚款没有用,因为罚款的数额比他们通过正常渠道处理垃圾的方式花费得要少,这样人人都乱倒垃圾而交罚款了. 问Politician的assumption: 我选的:那些被罚了款的人不需要再按正常渠道把垃圾清理干净。 |