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
31
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."
According to the bee experts, which is not the possible cause of the decline of bee populations in this passage?
选项
A、The cold weather.
B、The poor nutrition of bees.
C、The varroa mites.
D、The neonicotinoid pesticides.
答案
A
解析
细节题。文章第四段提到Beekeepers are puzzled by the decline because thecold winter and early spring should have favoured bees.(蜂农们对蜜蜂数量的下降感到很迷惑,因为寒冬季早春应该有利于蜜蜂的生存),可见在经验丰富的养蜂专家看来,寒冷的天气并非蜜蜂数量下降可能的原因。故选择A项。B、C、D三项文章均有提到。
转载请注明原文地址:https://kaotiyun.com/show/14m7777K
0
大学英语六级
相关试题推荐
Theymayappeartobemarvelsofmodernscience.Buttheideasthatledtothewondersofsatellite【B1】______,organtransplant
A、Ancientpeopleextractedjuicefromgrapes.B、Peoplestoredgrapesincontainersforwine.C、Juicefromripegrapesunexpected
A、MakingtheilliteratehaveaccesstoInternet.B、Creatingsimplerlanguageforitsusers.C、Attractingmorephoneuserstojoi
A、Itlearnsquickly.B、Itcomfortsitsowner.C、Itbarksloudly.D、Itknowsmanylanguages.D目的原因题。女士询问男士小狗的长处,男士说他的小狗能听懂英语、日语和法
CanthePCIndustryResurrectItself?A)InternetDataCenter’s(IDC)recentreportstatedthatPCshipmentsdeclined13.9%lastqu
Sodium(钠)isakeycomponentofsalt.Eatingtoomuchofitcan【C1】______tohighbloodpressure,amajorriskformostpeopleas
Sodium(钠)isakeycomponentofsalt.Eatingtoomuchofitcan【C1】______tohighbloodpressure,amajorriskformostpeopleas
Sodium(钠)isakeycomponentofsalt.Eatingtoomuchofitcan【C1】______tohighbloodpressure,amajorriskformostpeopleas
A、Takethejoboffer.B、Tryanotherjob.C、Bargainalittlebit.D、Concentrateonherstudies.A由对话中女士提到的Idon’tthinkI’lltake
IfthepopulationoftheEarthgoesonincreasingatitspresentrate,therewill【B1】______notbeenoughresourcesleftto【B2】_
随机试题
李某为资助15岁的王某上学,与王某订立赠与合同,赠与王某10万元,并就该赠与合同办理了公证。后李某无正当理由,在交付给王某6万元后就表示不再赠与了。根据合同法律制度的规定,下列表述中,正确的是()。
将水喷洒于空气中而使空气减湿,应该使水温()。
进口国国内的分销渠道的组成有_______、批发商、零售商。
u=f(x+y,x2,ysinx),求
ForanincreasingnumberofstudentsatAmericanuniversities,oldissuddenlyin.Thereasonisobvious:thegrayingofAmerica
先天性乳糖酶缺乏腹泻胰性霍乱综合征
某种职业道德对该行业以外的人( )。
随着科学技术的发展,机器“思维”将取代人类思维。
设4元齐次方程组(Ⅰ)为且已知另一4元齐次线性方程组(Ⅱ)的一个基础解系为α1=(2,-1,a+2,1)T,α2=(-1,2,4,a+8)T.求方程组(Ⅰ)的一个基础解系;
England’sbinge-drinkinghabitisoneofthemostentrenchedinEurope—evenRomaninvaderswroteaboutitwithhorror.Manyfear
最新回复
(
0
)