首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
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
admin
2014-12-26
29
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 leads to bee Aids according to Roddick?
选项
A、The parasitic mites.
B、A lack of nutrition.
C、The neonicotinoid pesticides.
D、The cold weather.
答案
D
解析
细节题。根据题目中的bee Aids可定位至文章第十段,根据Thesesystem of insects that feed off them,disorientating bees,impairing their foraging abilityand weakening their immune system.causing bee Aids.(这些新烟碱类的农药会渗透到农药中,任意侵蚀以这些植物为食的昆虫的神经系统,迷惑蜜蜂,损害它们的觅食能力,从而降低它们的免疫能力,最终导致蜜蜂患上艾滋病。)可知,neonicotinoidpesticides“新烟碱类的农药”是导致蜜蜂患艾滋病的原因,因此选择D。
转载请注明原文地址:https://kaotiyun.com/show/m4m7777K
0
大学英语六级
相关试题推荐
A、ThenumberofNetusersisgrowingfastindevelopingcountries.B、MostpeopleindevelopedworldareNetusers.C、Netusersa
Ataneventwherealleyesareonnewcarsfromworld-classdesigners,buddingautomotivedesignersaregettingtheirfeetwetw
RainforestCityA)Apatchoftropicalrainforesthastwicethenumberofmammalspecies,fivetimesthebatsandbirdsandtent
It’sabrandnewworld—aworldbuiltaroundbrands.Hard-charging,noise-making,culture-shapingbrandsareeverywhere.They’re
Sodium(钠)isakeycomponentofsalt.Eatingtoomuchofitcan【C1】______tohighbloodpressure,amajorriskformostpeopleas
Sodium(钠)isakeycomponentofsalt.Eatingtoomuchofitcan【C1】______tohighbloodpressure,amajorriskformostpeopleas
IfthepopulationoftheEarthgoesonincreasingatitspresentrate,therewill【B1】______notbeenoughresourcesleftto【B2】_
Asgoodsandservicesimproved,peoplewerepersuadedtosendtheirmoneyonchangingfromoldtonew,andfoundthechangewort
Widespreadadoptionofplug-inelectricvehiclescoulddramaticallycutgreenhousegaspollutionandreduceU.S.dependenceonf
随机试题
A.艾叶B.朱砂C.藤黄D.黄芩E.芒硝炒炭后温经止血作用增强的药材是
驾驶机动车在冰雪道路行驶时,最高速度不能超过多少?
A、 B、 C、 D、 E、 D
下列不是血厥实证的特点的是
下列项目中,属于流动资产的有()。
所有经济业务的发生都会引起会计等式两边同时发生变化。()
《宪法》在序言中明确规定:“本宪法以法律的形式确认了中国各族人民奋斗的成果,规定了国家的根本制度和根本任务,是国家的根本法,具有最高的法律效力。”同时规定:“全国各族人民、一切国家机关和武装力量、各政党和各社会团体、各企业事业组织,都必须以宪法为根本的活动
下列选项中,影响语音知觉的因素有()
实施BSP研究的主要活动中应包括多项活动内容,如Ⅰ.定义企业过程Ⅱ.定义数据类Ⅲ.成果报Ⅳ.定义信息结构其中最基础的活动应该是
在下列有关Windows98/XP设备管理功能的叙述中,错误的是
最新回复
(
0
)