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
2010-12-04
57
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 and nutritional deficiencies caused by lack of food.
How can biotech help? Biotechnologists have developed genetically modified rice 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, bacteria or fungi. 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 staple 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 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、Hunger and Malnutrition in Developing Countries
B、Hunger and Malnutrition Biotech Does Promise
C、Genetically Modified Foods Feed the World?
D、Application of Biotech Challenges World Hunger
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,第二段则用How can biotech help?暗示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。因此答案为C)。
转载请注明原文地址:https://kaotiyun.com/show/ves7777K
0
大学英语六级
相关试题推荐
A、Abruzziisverypatientanddetermined.B、Linda’sroommatedoesmostofthecleaningintheirapartment.C、Lindadoesn’treall
Learningdoesnothappenpassively.Itisanactivitythatapersondoes.Itisataskcanbeattemptedinvariousways,someof
A、Atarestaurant.B、Ataschoolcanteen.C、AtacafeteriaD、Ataworkers’dininghall.C选项都和地点有关,本题是地点题。从Whycan’tyoueatlunc
A、ByreadingtheBBCbook.B、BygoingtoaneveningclassbyBBC.C、BywatchingBBCprograms.D、BygoingtoSpaintotalkwithS
A、Theyarechangedtomakethesitemoreinteresting.B、Theyareexpandedtolimittheamountofconstruction.C、Theyareintegr
A、Awebpageauthoringprogram.B、Akindofbeverage.C、Acomputergame.D、Akindofsoftware.B综合推断题。女士问男士是否有关于Java或JavaScript的
A、Towireheroffice.B、Tofixthetransformer.C、Towireherbuilding.D、Tofixthewires.C综合推断题。女士想要男士修理接线盒,接着解释说也就是把电线接上;男士问
AroundtheWorldinEightMegabytesWhenMicrosoftputtheoriginalFlightSimulatorprogramontothemarket,intheearly1
Negotiating—acomplexprocessevenbetweenpartiesfromthesamenation—isevenmorecomplicatedininternationaltransactions
A、Theyshowfear.B、Theystarttocry.C、Theyturntoadults.D、Theyreachouttotouchthem.D短文提到,somebabies害怕陌生的成年人,但他们却会rea
随机试题
人民政协在我国政治生活中继续发挥重要作用,以下对人民政协理解正确的是()
FewAmericansremaininonepositionoroneplaceforalifetime.Wemovefromtowntocitytosuburb,fromhighschooltocolle
A、乙酰唑胺B、氢氯噻嗪C、阿米洛利D、螺内酯E、呋塞米轻型尿崩症选用( )。
根据《中华人民共和国海关稽查条例》的规定,海关可以在规定期限内,对被稽查人的与进出口活动有关的账簿、单证等资料实施稽查,不受任何单位和个人的干涉。()
某公司总经理在工作报告中对该公司的风险管理作了如下的介绍和描述:(1)该公司在上年度完成了风险管理;(2)企也风险管理的有效实施有赖于公司中层以上管理人员的工作;(3)公司的风险管理是企业层面的一项战略工作;(4)公司风险管理将确保各项一工作符合公
已知直线y=k(x一3)(k<0)与抛物线y2=一12x相交于A、B两点,F为抛物线的焦点,若|FA|=2|FB|,求直线的方程.
认识的客体是指()。
社会主义精神文明在社会主义现代化建设中具有的重要战略地位和作用,表现在()。
“言之不足故嗟叹之.嗟叹之不足故咏歌之。咏歌之不足,不知手之舞之,足之蹈之也。”这段论述是关于()的阐释。
Thecandidatethemedia’schargeofpoliticalinexperiencebycitinghisbroadbackgroundinbothlocalandstategovernment.
最新回复
(
0
)