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
2013-02-05
85
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://kaotiyun.com/show/0jI7777K
0
大学英语六级
相关试题推荐
A、Ithasbeenthebestsellerforweeks.B、Itadvisespeopletochangethemselves.C、Itisbeingsoldataverylowprice.D、Itd
A、Shehadabadcold.B、Shehadacaraccident.C、Shegothomebefore10o’clock.D、Shewasdelayed.D对话中女士提到,Ifthetrafficwas
GraduateeducationistheDetroitofhigherlearning.MostgraduateprogramsinAmericanuniversitiesproduceaproductforwhic
A、Stayandnegotiateormove.B、Buyalaptoporaccepttheincrease.C、Moveclosertotheschoolorthesubway.D、Theyhavenoc
A、Heisasfatasapotato.B、HeisfondofwatchingTV.C、Helikespotatoesverymuch.D、Hedoesn’tknowmuchaboutTV.B由男士提到的
TheTruthaboutLyingRickyGervais’snewfilm,TheInventionofLying,isaboutaworldwherelyingdoesn’texist,whichme
Marriagemayimproveyoursleep,andbettersleepmayimproveyourmarriage,twonewstudiessuggest.Womenwhoaremarried
Chinahasoutlinedanewapproachtoforeigninvestment,withplannerssayingtheywillnowfocuslessonattractinglargeamoun
Chinahasoutlinedanewapproachtoforeigninvestment,withplannerssayingtheywillnowfocuslessonattractinglargeamoun
A、Sheshouldgiveuptheclass.B、Shehastowaitanothertimeforregistration.C、Shecancomebackforregistrationaweeklat
随机试题
巴纳德的组织要素与平衡理论。
某企业拟在A省B市C区开办零售药店,因此向B市食品药品监督管理局提出筹建申请,提交相关材料。食品药品监督管理局对申报材料进行审查后,作出了同意筹建的决定,并在验收合格后向其颁发了药品经营许可证。药品经营许可证核定的经营范围是“中成药、中药饮片、化学药制剂、
会计职业道德建设的组织与实施应依靠()。
某评估机构对一拟快速变现的厂房进行评估,已知在评估时点与其完全相同的资产正常变现价为380万元,评估师经综合分析,认为快速变现的折扣率为50%,则该厂房的快速变现价值为()万元。
下列关于税负转嫁的说法,正确的是()。
Thelargestearthquake(magnitude里氏9.5)ofthe20thcenturyhappenedonMay22,1960offthecoastofSouthCentralChile.I
小叶和小巫是好朋友,今天恰好是星期六,尽管下起小雨,小叶还是想找小巫玩,到昆明湖去划船或者游泳。但是,小叶知道,只有不下雨,小巫才游泳或者划船。如果上述断定真,以下哪项也必定是真的?
CostaRican-bornartistJimenezDerediaworksona______scale:thesculptureshecreatesaretrulyimmense.
Becauseithasnodistinctandrecognizabletypographicalformandfewrecurringnarrativeconventions,thenovelis,ofalllit
Iamhonoredtobeheretoday,【L1】______HarvardatthiscelebrationoftheCollegeBoard’shalfcenturyofworkingtopromote【L2
最新回复
(
0
)