首页
登录
职称英语
With rapid growth of world population, mainly in developing countries, the a
With rapid growth of world population, mainly in developing countries, the a
游客
2023-09-02
72
管理
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. [br] Biotech can’t solve the problem of distributing food in developing countries because______.
选项
A、enough food can be produced to feed the world population
B、the transport infrastructures in some countries are backward
C、biotech itself can not play its role in those countries
D、farmers in those countries have no right to use the technology
答案
B
解析
细节辨认题。文章提出,从整体上看,世界生产的粮食总量足够养活所有人,但大部分粮食却不是在需要的地方。尤其在道路运输基础设施落后的国家,生物科技为食物供给带来的希望有多大,地理条件对食物供给的限制就有多大。由此可得B)为答案。
转载请注明原文地址:https://tihaiku.com/zcyy/2979457.html
相关试题推荐
[originaltext]Americanscientistsaredevelopingmapsthatcanidentifyare
Wecanbeginourdiscussionof"populationasglobalissue"withwhatmostpe
Whatdoesthepassagemainlydiscuss?[br]Mostprospectivecandidatesvisitthe
[originaltext]Therearetwobasicwaystoseegrowth:oneasaproduct,th
[originaltext]Therearetwobasicwaystoseegrowth:oneasaproduct,th
Inthedevelopedcountries,thedominantfactorinthenextsocietywillbe
Inthedevelopedcountries,thedominantfactorinthenextsocietywillbe
Inthedevelopedcountries,thedominantfactorinthenextsocietywillbe
Thepassageismainlyabout______.[br]TheBritishDNAdatabaseisestablished
Thepassageismainlyabout______.[br]Thephrase"stumbledupon"(Line1,Par
随机试题
Wheredoestheconversationhappen?[originaltext]M:Willyoudomeafavor,mis
1 "Internationalcommunication"iscommunicationbetweenmembersofdiff
[originaltext]MissHelenisa40-centimeter-longgrayhornshark.Shespendshe
【教学过程】 (一)导入新课 【多媒体播放】展示锈蚀的铁制品的图片。 【教师引导】钢铁的锈蚀不仅是资源的浪费,同时钢铁锈蚀也可能会引起某些安全事故。
对生命投入的成本和效益比最低的是()A.把钱投入临床治疗 B.把钱投入临终前
根据《建筑工程建筑面积计算规范》(GB/T50353-2013)规定,建筑物的
抗肿瘤药物最引发的严重不良反应是A:视物模糊 B:抑制骨髓 C:脱皮、红疹等
根据《城市居住区规划设计规范》规定,( )宜为14m~20m。A.居住区道路红
根据民事法律基本理论,下列关于公示、公信原则的说法中正确的是( )。A.不将物权
某企业生产经营发生严重困难需要裁员,依据《劳动合同法》的规定,下列情形中,用人单
最新回复
(
0
)