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
With rapid growth of world population, mainly in developing countries, the available cultivable land per person has declined ste
With rapid growth of world population, mainly in developing countries, the available cultivable land per person has declined ste
admin
2013-07-20
27
问题
With rapid growth of world population, mainly in developing countries, the available cultivable land per person has declined steadily since 1960 and will decease by half over the next 50 years. Besides, about 400 million women of childbearing age are iron deficient, leaving their babies exposed to various birth defects. As many as 100 million children suffer from vitamin A deficiency. Tens of millions of people suffer from other major ailments (疾病)and nutritional deficiencies caused by lack of food.
How can biotech help? Biotechnologists have developed genetically modified rice that is fortified with beta-carotene (β胡萝卜素)and additional iron, and they are working on other kinds of nutritionally improved crops. Biotech can also improve farming productivity in places where crop failures are caused by pests, drought, poor soil and crop viruses or bacteria. Genetically modified, virus-resistant crops can reduce that damage, as can drought-tolerant seeds in regions where water shortages limit the amount of land under cultivation. Biotech can also help solve the problem of soil that contains excess aluminum, which damages roots and causes crop failures.
Many scientists believe biotech could raise overall crop productivity in developing countries as much as 25% and help prevent the loss of those crops after they are harvested. Yet for all that promise, biotech is far from being the whole answer. In developing countries, lost crops are only one cause of hunger. Poverty plays the largest role. Making genetically modified crops available will not reduce hunger if farmers cannot afford to grow them or if the local population cannot afford to buy the food those farmers produce.
Nor can biotech overcome the challenge of distributing food in developing countries. Taken as a whole, the world produces enough food to feed everyone—but much of it is in the wrong place. Especially in countries with undeveloped transport infrastructures, geography restricts food availability as dramatically as genetics promises to improve it.
Biotech has its own "distribution" problems. Private-sector biotech companies in rich countries carry out much of the leading-edge research. Their products are often too costly for poor farmers in the developing world, and many of those products won’t even reach the regions where they are most needed. Biotech firms have a strong financial incentive to target rich markets first to help them rapidly recoup (收回)the high costs of product development. But some companies are responding to the needs.
What is the best title of this passage?
选项
A、Poverty and Malnutrition in Developing Countries.
B、Poverty and Malnutrition: Biotech Does Promise
C、Genetically Modified Foods Feed the World?
D、Application of Biotech Challenges World Poverty.
答案
C
解析
主旨大意题。本文第一段提出了发展中国家面临的问题;第二段指出生物科技对此可以起到一定的作用;而第三段提出生物科技还远远不能解决所有问题。由此得出结论,本文探讨的主题应该是对生物科技应用于农业以期解决温饱问题提出质疑。
转载请注明原文地址:https://jikaoti.com/ti/hjbFFFFM
0
大学英语六级
相关试题推荐
Theincreaseinglobaltrademeansthatinternationalcompaniescannotaffordtomakecostlyadvertisingmistakesiftheywantt
Itisacommonplaceamongmoraliststhatyoucannotgethappinessbypursuingit.Thisisonlytrueifyoupursueit【C1】______.
Withtherecentrapidadvancesininformationtechnologies,educationalresearchersateverylevelandinevery【B1】______haved
A、Reducethecostofasilencer.B、Makeasilencerunnecessary.C、Improvetheperformanceofasilencer.D、Makeacarquieter.B
Bysaying"thegrowthoftheproportion...toyoungergenerations."(Line2,Para.5),AntheaTinkerreallymeansthat______.W
Commutertrainsareoftenstuffyandcrowded,andtheyfrequentlyfailtorunontime.Asifthatwerenotbadenough,Tsuyoshi
A、Newtasks.B、Tripexpense.C、Vacation.D、TriptoEurope.D信息明示题。男士猜测说女士一定对她的欧洲之行感到相当兴奋,并询问女士离开的日期;女士说她在三周之内就会离开,但离开之前还是有一些事要去处
It’sasimplecalculus,kidsandmoney:Frombirthuntilcollegegraduation,childrenconsumedollarslikethey’rechickennugge
A、Buytwoticketsfortheshow.B、Gototheexhibitalone.C、Stopworkingontheproject.D、Helpthemanwashinghishands.B4个选
A、Howmuchtherentingpriceis.B、Howlongtherentingtimeis.C、Whatutilitiesareincludedintherental.D、Whatkitchenequ
随机试题
采用页式存储管理的系统中,若地址用16位表示,其中7位表示页号,则页的大小为
受体与配体结合的特点包括
A.平肝潜阳,镇静安神,收敛固涩B.平肝潜阳,息风止痉,收敛固涩C.平肝潜阳,软坚散结,收敛固涩D.平肝潜阳,镇静安神,化酸软坚牡蛎的功效是
A.珠蛋白合成障碍B.血红素合成障碍C.DNA合成障碍D.铁利用障碍E.造血干细胞异常海洋性贫血是由于
某公司为扩大生产,向甲借款30万元,并约定将该公司的厂房质押给甲。其后,该公司又向乙借款30万元,并以同一厂房为乙设立抵押权并办理了登记。此后,该公司又向丙借款30万元,并约定如果不能按时还款,变卖厂房所得由丙率先收场。后该公司未能按时还款,厂房变卖所得6
下列选项中,()计算精度较低,但由于其编制速度快,因此对一般附属、辅助和服务工程等项目,以及住宅和文化福利工程项目或投资比较小、比较简单的工程项目投资概算有一定实用价值。
由于社会情势的变化而对原有的法律规范作出变更的活动称为()。
AUSdrugcompanyhasincreasedthepriceofanacnecreambymorethan3,900%to$9,561inlessthan18monthsinthelatestex
MerovTechnologies,oneofRussia’s______providersoftelecommunicationservices,willlaunchmoreaffordablebroadbandpackage
Fromthenewsitem,wearesurethiswasatleastRice’s______triptoIraq.
最新回复
(
0
)