问两道逻辑题，望牛牛们帮忙

melody1101

1、A beach has long had a dolphin feeding program where foods are given to dolphins several times a day; the dolphins get as much as half of their food each day there. While dolphins that first benefit from the program as adults are strong and long-lived, their offspring have a shorter life expectancy than offspring of dolphins that feed only in the wild
解释题
A. Many dolphines that feed at the beach with their offspring come to the beach only a few times a mouth.
B. Adults dolphins that feed at the beach spend much less time teaching their offspring how to catch fish in the wild than do other adult dolphins.
选哪个呀亲们，答案是A，我觉得是B

2、Outbreaks of Oudayas Valley fever occur irregularly in North Africa, several years apart. When outbreak do occur, they kill hundreds of cattle. A livestock vaccine against the disease exists but is rarely used. It is too expensive for farmers to use routinely, and because it is ineffective untill two weeks after vaccination, administering it after an outbreak begins helps very little. Nonetheless, experts predict that use of the vaccine will increase significantly within the next few years.

解释题

A. When an outbreak of Oudayas Valley fever occurs, unaffected countries often refuse to import livrstock from the countries affected by the outbreak.

B. Recently published research has shown that certain identifiable climatic conditions are almost invariably followed, within three to six weeks, by an outbreak of Oudayas Valley fever.
答案是B，我觉得A对，快快答复小女子哈，谢谢各位啦！

韩啸0508

第一个 我也不明白，第二个的话， B 的关键在于 within three to six weeks， 这样 farmer就可以提前预防打vaccine了，（因为routinely太贵，而药要两周之后才有效）

melody1101

我记得老师说过大众权威的观点做降格处理，而且B选项没说certain  climatic conditions 对这件事会带来什么样的影响。

韩啸0508

fever会由不定的天气导致（即 certain climatic condition会诱发fever，但不一定，所以是预防，就像我们打疫苗一样），而 大众权威之所以被降格， 估计是要在assumption或是must be true这样的，只能从原文出发，没有新元素的情况下吧（抱歉不是很清楚您们老师的原话是怎样额）

melody1101

哦，这样啊，那第一个怎么个情况，是不是答案有问题？

韩啸0508

那个，我表示也不太明白。。。刚才百度文库了一下，看到那个上面的答案应该是你选的B，因为没有时间教offspring，所以offspring的生存能力下降了，符合题目的

melody1101

恩，知道啦，谢谢你了！

melody1101

1. Finland imposes a high tariff on the export of unprocessed hazel nuts in order to ensure that the nuts are sold to domestic processing plants. If the tariff were lifted and unprocessed hazel were sold at world market prices, more farmers could profit by growing hazels. Nevertheless, since all the processing plants are in urban areas, removing the tariff would seriously hamper the government's effort to reduce urban unemployment over the next ten years.
削弱
A. Some of the by-products of processing hazels are used for manufacturing plants and plastics.
B. Other countries in which hazels are processed subsidize their processing plants.
C. More people in Finland are engaged in farming hazels than in processing them.
D. Buying unprocessed hazels at lower than would market prices enables hazel processors in Finland to sell processed nuts at competitive prices.
E. A lack of profitable crops in driving an increasing number of small farmers in Finland off their land and into the cities.
答案是E.

2. The imposition of quotas limiting imported iron will not help the big Chinese ironmills. In fact, the quotas will help "mini-mills" flourish in the China. Those small domestic mills will take more business from the big Chinese ironmills than would have been taken by the foreign ironmills in the absense of quotas.
削弱最后一句话
A. Quality rather than price is a major factor in determining the type of iron to be used for a particular application.
B. Foreign ironmills have long produced grades of steel comparable in quality to the iron produced by the big Chinese mills.
C. Chinese quotas on imported goods have often induced other countries to impose similar quotas on Chinese goods.
D. Domestic "mini-mills" consistently produce better grades of iron than do the big Chinese mills.
E. Domestic "mini-mills"  produce low-volume, specialized types of iron that are not produced by the big Chinese steel mills.
答案是E.

3. Editor: Articles in Gardening Magazine often encourage sales of the plants they describe, especially among people new to gardening. Therefore, we will not publish articles or accept advertisements praisng the beauty of rare wildflowers any more. Most such plants sold to gardeners have been difficult to propagate under cultivation; consequently, plant sellers often collect them in the wild. Our new policy is part of our efforts to cease this yearly plundering of our native plant populations.

削弱the wisdom of the magazine's new policy as a way of pursuing the intended effect

A. When people new to gardening buy plants, they often fall to take adequate care of the plants that they buy and become discouraged from buying those varieties again.
B. Plant sellers who sell rare wildflowers have no reasonably inexpensive alternative way to offer their wares directly to new gardeners.
C. The demand for rare wildflowers rarely exceeds the number of such plants that can be collected in the wild by plant sellers.
D. The propagation of rare wildflowers often depends on the plants' interaction with other organisms in their environment, such as plants that create suitable soil conditions or insects and birds that disperse seeds.
E. Revenues from sales of plants collected in the wild are supporting the discovery of new law-cost techniques enabling rare wildflowers to be readily propagated in nurseries.
答案是E

韩啸0508

第一个题，题目说，芬兰要加关税来保护国产nuts的低价优势，这样，farmer就可以种hazel（榛子，nuts的一种）来增加收入，但是加工企业都在城市里，加税会阻碍降低失业率的目标。
题目有几点要注意，1， 几个元素之间的因果关系，加进口nuts的税》加工nuts的企业成本增加》企业在城里》阻碍城里失业率降低
                           2， farmer通过中nuts来profit
                           3， 结论是，加税阻碍失业率的降低
问削弱：  E 是说 缺少有经济效益的农作物导致， 大量农民离开农村涌向城市
             E其实说的是， 如果不加税，农民没利润，农民涌向城市也增加了失业人口

韩啸0508

第二个题目， 施行企业进口铁矿定额制不会有助于大型钢铁企业，事实上，有利于小企业，因为，小企业会抢走大企业的生意而不会被外企taken
E， 小企业生产的是low volume铁， 和大企业生产的不一样
因为大小企业生产的产品不同，小企业不会抢大企业的生意（这里削弱的是抢大企业生意这部分）