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 rot the roots of crops. B、They attack most of the crops in the field. C、They destroy up to 18% of the crops before harves
A、They rot the roots of crops. B、They attack most of the crops in the field. C、They destroy up to 18% of the crops before harves
admin
2022-09-21
36
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、They rot the roots of crops.
B、They attack most of the crops in the field.
C、They destroy up to 18% of the crops before harvest.
D、They destroy about 10%-16% of the world’s crops in the field.
答案
D
解析
转载请注明原文地址:https://jikaoti.com/ti/ckfFFFFM
0
大学英语六级
相关试题推荐
A、Theymayattendfewermeetings.B、Theycanhelpchoosetheproductsthatwillbesold.C、Theycanpaylowermembershipfee.D、
A、Thehotelassignedfive-bedroomforher.B、Thehotelofferedaspecialpackagetoher.C、Thehotelconfusedherwithanother
A、Becausehedislikeschallenges.B、Becausehisbossistoopicky.C、Becauseitrequireshimtoworkovertime.D、Becauseitist
A、Watermightbecomecleanandpure.B、Peoplewillliveinabetterenvironment.C、Therewillbenopolicetoprotectpeople.D、
A、Givingnecessitytothehomelesswithfriends.B、Helpingdeliveringpackagesinthepostoffice.C、Takinggoodstothelocaln
A、Thereisagreatdifferencebetweenreadingandlistening.B、Thereareeffectivewaystopracticetheproofreadingskill.C、Hi
A、Itisanultimategoalforwriters.B、Itisnotasmuchasbefore.C、Itisthekeyfactortoattractreaders.D、Ithasbecome
A、Itwillmakeconflictsbetweenpeople.B、Itwillhaveabadimpactonbrains.C、Itisawasteoftimeandenergy.D、Itisaki
NicolaSturgeon’sspeechlastTuesdaysettingouttheScottishgovernment’slegislativeprogrammefortheyearaheadconfirmedw
A、Theydidnotbelievetheharmofstress.B、Theymightdiefromexperiencingalotofstress.C、Theirriskofdyingincreasedo
随机试题
关于稽留流产的描述,错误的是()
当明确为药源性疾病时,应采取的合理措施是
糖皮质激素对血细胞影响的叙述,哪项是错误的
(2013年)根据世界贸易组织《服务贸易总协定》,下列哪一选项是正确的?()
甲企业于20l3年1月1日取得乙公司20%有表决权股份,能够对乙公司施加重大影响。假定甲企业取得该项投资时,乙公司除一项存货外,其他可辨认资产、负债的公允价值与账面价值相等,该存货账面价值为2000万元,公允价值为2400万元,至2013年12月31日,乙
()是推动经济全球化的市场因素。
导游人员第一次亮相,至关重要的是仪容礼仪,应做到()。
下面关于行政许可设定的说法,哪些是正确的?()
设窗体上有2个框架,每个框架中有若干个单选按钮,下面叙述中正确的是()。
下列Access表的数据类型的集合,错误的是______。
最新回复
(
0
)