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
2022-09-21
49
问题
Insects and diseases that attack food crops are moving as rising temperatures bring changes to the environment. Plant diseases alone destroy an estimated 10% to 16% of the world’s crops in the field, experts say, and plant diseases destroy another 6% to 12% 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 towards 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 towards 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、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/fIR7777K
0
大学英语六级
相关试题推荐
A、Peopleshouldcutdowntheirconsumption.B、Developingcountriesshouldmakegreaterefforts.C、Theworldshouldrealizethep
A、Therewillbelotsofjobopportunitiesinthesetwoareas.B、Therewillbelessjobopportunitiesinthesetwoareas.C、There
A、Getinformation.B、Watchafilm.C、Findabank.D、Buysomeshoes.B录音提及了购物中心有三层,第三层里有餐馆和电影院,可推断B正确。表转折之处常出考题,因此听到however就要注意,记
A、Employeeshavetoworkovertimenowandthen.B、Employeeshavetobeondutyeveryday.C、Employeeshavetofinishtheirwork
A、Becauseitexpandsrapidlyitsretailoperations.B、BecauseitsqueezescompetitorsoutofthemarketC、Becauseitappliesmac
A、Itworkswithuniversitiestooffermaster’sdegreesondataanalytics.B、Itcreatesaninternalprogramtotraintalentinda
A、Friendship.B、Memory.C、Academicperformance.D、Handwriting.C讲座中提到,科学家研究发现,电脑可能会影响学生的在校表现(performanceinschool),这称作academic
Forthispart,youareallowed30minutestowritealettertotheeditorofanewspaper.Youshouldwriteatleast150wordsbu
A、Approximately1.8milliontons.B、Approximately18milliontons.C、Approximately8milliontons.D、Approximately80millionto
A、Thecostofgrowingtobaccoincreased.B、Manypeoplebegantogiveupsmoking.C、Thegovernmentbannedsmokingandcigarette.
随机试题
在20件产品中,有15件一级品,5件二级品,从中任取3件,其中至少有一件为二级品的概率是多少?()
在影响城市形成和发展的各种自然地理因素中,首要因素是【】
大隐静脉曲张术后早期活动的主要目的是防止
A、克林霉素B、头孢唑林C、万古霉素D、红霉素E、克拉霉素与奥美拉唑、替硝唑合用的二联疗法治疗胃溃疡
中国人李纳移民并定居加拿大,后与加拿大一男子结婚并取得加拿大国籍,李纳回福建老家省亲。住在其亲属李强家,依我国《国籍法》及《出境入境管理法》,下列哪项是正确的?()
造成直接经济损失()万元以上的事故为工程建设事故中的一级事故。
生成利润表数据。
宽免和费用扣除的内容不包括()
某党员每月工资收入2000元(税后),应交纳党费()元。
有以下程序:classDate{public:Date(inty,intm,intd);{year=y;month=m;d
最新回复
(
0
)