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
2020-09-03
89
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、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/2TP7777K
0
大学英语六级
相关试题推荐
Allthroughtheagesthebathasbeenacreatureofgreatmystery.BatshaveinfluencedtheimaginationoftheWesternWorldsin
UsingFacebookmakespeoplesadder,atleastaccordingtosomeresearch.Butjustwhatisitaboutthesocialnetworkthattakes
BernardBailynhasrecentlyreinterpretedtheearlyhistoryoftheUnitedStatesbyapplyingnewsocialresearchfindingsonthe
Parents’Homework:FindPerfectTeachersforKidsA)TomiHalldidwhatshecouldtolobbyforthebestteachersforhertwochi
TheUnitedStateshasamajorproblemonitshands.Theonlywaytosolveitisthrougheducation.Negroes(黑人)shouldknowabout
Throughoutevolution,humanshavebeenactive.Ourancestorschasedpreyashunter-gatherersand【C1】______frompredators.Morer
A、Onlyafewofthemcauseproblemstonativespecies.B、Theymayturnouttobenefitthelocalenvironment.C、Fewofthemcans
A、Ithasthemostaggressivepolicies.B、Ithasthehappieststudents.C、Itisaveryexpensiveprivateschool.D、Itislocated
A、Drinkingleadstosmokingaddiction.B、Smokingcanremovetheamountofalcohol.C、Drinkingandsmokingcontributetoeachoth
Inthissection,youaregoingtoreadapassagewithtenstatementsattachedtoit.Eachstatementcontainsinformationgiveni
随机试题
冷却液大循环:
超硬铝7A04可用作承力构件和高载荷零件,如飞机上的大梁等。
定性决策
患儿10个月,因高热、呕吐3天,惊厥发作2次入院。查体:前囟隆起,颈抵抗阳性。脑脊液外观微浑,白细胞数1300×106/L,分叶70%,蛋白(++),糖0.95mmol/L。最可能的诊断是:()
有关X射线造影录像(VF)错误的是
颁发《执业药师资格制度暂行规定》的目是
确定多式联运的最重要的特征是()。
英国广播公司用“史无前例”这个词强调舰载机起降对于中国的意义。法国媒体称,这真令人震惊,歼-15货真价实地完成了在“辽宁舰”上的起降。德国媒体称,中国首艘航母就像中国的一座“浮动军事大学”,很多技术都是中国自己研发的。军事专家称,舰载机成功起降标志着___
派生词
TheHundredYears’Warwasaconflictbetween
最新回复
(
0
)