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
A、Unusual insects. B、Crop pests and diseases. C、Different organisms. D、Only viruses and bacteria. C
A、Unusual insects. B、Crop pests and diseases. C、Different organisms. D、Only viruses and bacteria. C
admin
2020-09-03
54
问题
Insects and diseases that attack food crops are moving as risen temperatures bring changes to the environment. (23)Plant diseases alone destroy an estimated 10 to 16 percent of the world’s crops in the field, experts say, and plant diseases destroy another 6 to 12 percent after harvest.
A new study examines the movement of crop pests and diseases, and how it will affect agricultural production worldwide.
Dan Bebber is a senior research fellow at the University of Exeter in Britain. He says research has shown that wild plants and animals are moving toward Earth’s North and South poles as the planet warms.
Mr. Bebber wanted to know if the same thing was happening with organisms that attack agricultural crops. He examined reports of first sightings of new insects and diseases around the world. The records came from CABI—the Centre for Agricultural Bioscience International. He says the group began collecting information from developing and industrialized countries years ago.
(24)Dan Bebber and his research team studied 612 different organisms—from viruses and bacteria to insects like beetles and butterflies. They found that since 1960, crop pests and diseases have been moving toward the poles at an average rate of about 3 kilometers each year. Mr. Bebber says this puts the most productive farmland in the world in danger.
As new species of pests and diseases evolve and potentially the environment for them becomes more amenable at higher latitudes, the pressure on the breadbasket of the world is going to increase.
Farmers face other threats. Invasive species passed through trade are also causing problems. Gene Kritsky is an entomologist at the College of Mount St. Joseph in Ohio. He specializes in the study of insects. (25) He says climate change may improve conditions for some invasive species. It means that species in other parts of the world that might do well in warmer temperatures can now do well in the breadbasket of America.
Another entomologist Christian Krupke of Purdue University says the effects of these changes will depend very much on the crop, the insect and the disease. But he says the research is a warning sign that people should care about climate change and do something about it.
23. How bad are plant diseases to the crops?
24. What did Dan Bebber and his research team study?
25. What does Gene Kritsky say about climate change?
选项
A、Unusual insects.
B、Crop pests and diseases.
C、Different organisms.
D、Only viruses and bacteria.
答案
C
解析
转载请注明原文地址:https://kaotiyun.com/show/9TP7777K
0
大学英语六级
相关试题推荐
A、Toshowthatenzymesareveryeffective.B、Topointoutthatenzymescansometimesfailtowork.C、Toexplainwhatenzymesare
UsingFacebookmakespeoplesadder,atleastaccordingtosomeresearch.Butjustwhatisitaboutthesocialnetworkthattakes
A、Managersshoulddemonstrategoodbehaviour.B、Managersshouldincreasefinancialincentives.C、Managersshouldencourageco-op
A、Afour-manband,wearingcartooncharacters’custom.B、Avirtualband,composedoffictionalanimatedmembers.C、Acyberband,
A、Projectorganizer.B、Publicrelationsofficer.C、Marketingmanager.D、Marketresearchconsultant.D对话开头男士就问女士做市场研究顾问多长时间了,由此可知
A、Collectashtreeseedsforexperiment.B、Preservethehealthyashtreeseeds.C、Setupanewseedbankforresearch.D、Develop
A、Smokingcanreducethesleepyfeelingfromdrinking.B、Theyliketofeelmoreexcitementbroughtbysmoking.C、Theyhavebecom
A、DNAcansolveallthemysteriesinbiology.B、TheDNAoftwogroupsofgreenturtlesaretotallydifferent.C、TheuselessofD
A、Listhergreateststrengthsandweaknesses.B、Saysomethingaboutherlikesanddislikes.C、Writeabriefreporttoherdepart
Carmakershavelongusedsextoselltheirproducts.Recently,however,bothBMWandRenaulthavebasedtheirlatestEuropeanm
随机试题
组织战略的改变就要求做出相应调整的是___________。
就脏腑而言,五脏属就脏腑而言,六腑属
风痰阻络或热极动风可致胃热或虫积可致
A.差错造成患者暂时性伤害,需要采取预防措施B.患者已使用,但未造成伤害C.差错对患者的伤害可导致患者住院或延长住院时间D.差错导致患者永久性伤害E.差错导致患者死亡用药错误分为A~I级。E级错误是指()。
在海洋运输货物保险的除外责任中,适用于平安险、水渍险和一切险的除外责任包括()。
制造和安装精度要求较低;中心距离较大时,其传动结构简单是( )的主要特点。
投资者预期市场利率下降,其合理的判断和操作策略有()。
《导游人员管理条例》所称的导游人员,是指依照该条例规定(),接受旅行社委派,为旅游者提供向导、讲解及相关旅游服务的人员。
社会主义制度决定,政府应该用货币政策和财政政策等手段决定市场资源的配置。()
=________.
最新回复
(
0
)