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、They affect all agricultural production worldwide. B、They impact most part of the crops in the field. C、They destroy up to 22%
A、They affect all agricultural production worldwide. B、They impact most part of the crops in the field. C、They destroy up to 22%
admin
2021-08-20
86
问题
Insects and diseases that attack food crops are moving as risen temperatures bring changes to the environment. 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. 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. 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.
Questions 23 to 25 are based on the recording you have just heard.
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、They affect all agricultural production worldwide.
B、They impact most part of the crops in the field.
C、They destroy up to 22% of the crops before harvest.
D、They destroy about 10% to 16% of the world’s crops in the field.
答案
D
解析
转载请注明原文地址:https://kaotiyun.com/show/wwD7777K
0
大学英语六级
相关试题推荐
A、Socialconnectionsaregoodforlonelypeople.B、Lesssociallyconnectedpeopledonotenjoytheirlife.C、Thehealthoflonel
A、How724peoplelivedforthepast75years.B、Whatkeepspeoplehappyandhealthyinlife.C、Themeaningofwealthandhardwo
A、Heisgoodatsearchingtheinternetforinformation.B、Heisvisuallyimpairedbutdidnotstartschoollate.C、Hesayssome
A、Beingquietandbookish.B、Ignoringpeople’sjudgment.C、Sufferingfromstagefright.D、Havinganoutgoingpersonality.C选项都是动
A、Makingsmalltalkswithmanypeople.B、Stayingtillverylateinalargeparty.C、Talkingtoonlyasmallgroupofpeople.D、H
A、Bymakingthecomplaintfirmlyandimpolitely.B、Byexplainingclearlytheproblemwiththeitem.C、Bydescribinggenerallywh
RelationshipTalkingPoints:SpeakYourSpouse’sLanguageA)AnnaandMikePetersonrecentlyhaddinnerattheirfavouritesteakh
RelationshipTalkingPoints:SpeakYourSpouse’sLanguageA)AnnaandMikePetersonrecentlyhaddinnerattheirfavouritesteakh
A、Studentslearnbestbydoingthingsforreal.B、StudentslearnfastinbusinessenvironmentC、Studentslearnfastthroughonli
Forthispart,youareallowed30minutestowriteashortessayentitledProblemsofInfringementthroughtheInternetYoushou
随机试题
建筑某个空间发生火灾后,火势会通过()作用向周围区域传播。火灾产生的烟气也会从楼板、墙壁的烧损处和门窗洞口向其他空间蔓延,严重影响人员安全疏散和消防扑救。
下列不符合视力下降而眼底正常的眼病是
A.STB和UCB均升高,尿胆原强阳性,CB/STB<20%B.STB和CB均升高,尿胆原阴性,CB/STB>50%C.STB、CB和UCB均升高,CB/STB为20~50%D.STB和UCB均升高,尿胆红素强阳性,CB/STB<20%E.STB和
输液引起空气栓塞,致死原因是栓子阻塞()。
下面哪些选项不影响仲裁程序进行?()
财产清查中,盘盈一台手提电脑,全新的市价为:10000元,八成新。在批准处理以前的会计分录为()。
票据是由出票人依法签发的,约定自己或者委托付款人在见票时或指定的日期向收款人或持票人无条件支付一定金额的有价证券。()
在活跃市场中没有报价、公允价值不能可靠计量的权益工具投资,也有可能指定为以公允价值计量且其变动计入当期损益的金融资产。()
宗周、成周
A、Thisroomcanonlyaccommodateupto60students.B、Allthestudentswilllistentothelecture.C、Therearethreeroomsfort
最新回复
(
0
)