2. 外语
  3. Honeybee populations declined by 13.6% over the winter, according to a survey of beekeepers across England. Losses were most sev

Honeybee populations declined by 13.6% over the winter, according to a survey of beekeepers across England. Losses were most sev

admin2015-01-31  80
问题     Honeybee populations declined by 13.6% over the winter, according to a survey of beekeepers across England. Losses were most severe in the north-east, where the survey recorded a loss rate of 17.1%.
    Experts worry that the declines will affect plant productivity. There are also concerns that the declines, along with drought conditions in some area, will mean less English honey this year.
Martin Smith, president of the British Beekeepers Association, which carried out the survey, said: "If this was measured against similar losses in livestock, it would be seen as disastrous and there would be great concern on the knock-on impact of food prices."
    Beekeepers are puzzled by the decline because the cold winter and early spring should have favoured bees. They stay "clustered" tightly in their hives when it is cold and dry, saving energy for spring foraging when the temperature rises about 12°C.
    However, there is good news that the rate of colony loss has slowed. Four years ago, one in three hives was wiped out.
    Beekeepers suspect that poor nutrition is a likely cause of weakness in adult bees that makes them succumb to diseases spread by a parasitic mite.
    "The varroa mite is the number one reason why people lose bees, so the government needs to increase research to cure diseases caused by varroa," said Smith. "But a colony that has a good source of pollen and nectar will go into winter more strongly and better able to fend off disease."
The association is calling on everyone who has a garden, small, to plant bee-friendly plants this summer. "It is really important that there are flowering nectar-rich plants around in August, September and October to provide the nutrition that’s needed so the bees can top up their stores of honey in the hive to see them through winter," said Smith.
    A campaign being launched next week to save all bees, spearheaded by Sam Roddick and Neal’ s Yard Remedies, pins the blame for the decline on pesticide. It will start a petition to hand to Downing Street in October to ban the use of a class of pesticides that has been implicated in bee deaths across the world.
    Roddick said, "These neonicotinoid pesticides penetrate the plant and indiscriminately attack the nervous system of insects that feed off them, disorientating bees, impairing their foraging ability and weakening their immune system, causing bee Aids. On current evidence, Italy, Germany and Slovenia have banned some varieties. In the UK, it’s up to the people to show the government that if there is any doubt that they are contributing to bee deaths, we need to ban them."
    A spokesman for the government’s National Bee Unit said: "The UK has a robust system for assessing risks from pesticides and all evidence shows neonicotinoids do not pose an unacceptable risk when products are used correctly, but we will not hesitate to act if presented with any new evidence."
What is the experts’ point towards the decline of bee populations in winter?
选项 A、They are indifferent to the phenomenon.
B、They feel puzzled towards the decline and put forward several possible causes.
C、They are rational and they only persist on one possible reason.
D、It is hard to say.
答案B
解析 态度题。文章开头提到英国冬天蜜蜂数量下降的现象。接着讲到英国蜂农对此深感困惑，接下来，文章又列举了专家提出的几种可能的原因，但始终没有定论，可见专家们对于英国冬天蜜蜂数量下降的现象感到困惑，还没有找到真正原因。因此，正确答案是B。
转载请注明原文地址:https://www.kaotiyun.com/show/xth7777K
0

大学英语六级

相关试题推荐
随机试题
最新回复(0)