首页
登录
职称英语
With rapid growth of world population, mainly in developing countries, the
With rapid growth of world population, mainly in developing countries, the
游客
2024-05-28
39
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 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. [br] What can we learn from the last paragraph?
选项
A、Biotech is powerful in tackling world poverty and hunger.
B、The impact of genetic research on food production is limited.
C、More collaboration is needed to deliver farmers biotech solutions.
D、Fears that biotech might be harmful to man are unfounded.
答案
C
解析
综合判断题。文章最后一段指出,生物科技自身面临着“分配”问题。许多尖端研究都是富国的私营生物科技公司进行的。但这些新产品由于过于昂贵而无法交到贫穷农民的手中,所以人们应该加强合作,让农民能从生物科技成果获利,故答案为C)。
转载请注明原文地址:http://tihaiku.com/zcyy/3609919.html
相关试题推荐
Withrapidgrowthofworldpopulation,mainlyindevelopingcountries,the
Withrapidgrowthofworldpopulation,mainlyindevelopingcountries,the
IndustrialpollutionisnotonlyaproblemforthecountriesofEuropeandNorth
IndustrialpollutionisnotonlyaproblemforthecountriesofEuropeandNorth
IndustrialpollutionisnotonlyaproblemforthecountriesofEuropeandNorth
IndustrialpollutionisnotonlyaproblemforthecountriesofEuropeandNorth
IndustrialpollutionisnotonlyaproblemforthecountriesofEuropeandNorth
[originaltext]Theadvantagesanddisadvantagesofalargepopulationhavelo
WhichofthefollowingdoIPrightsprotect?[br]Wheredocsthecountries’diff
Onlytwocountriesintheadvancedworldprovidenoguaranteeforpaidleave
随机试题
[originaltext]M:Hi,Daphne,whatareyoubusywithtoday?W:Justsomeassignm
休克的特殊监测不包括()。A.中心静脉压CVP B.肺毛细血管楔压PCWP
某高层建筑消火栓给水系统拟采用下列防超压措施,哪几项正确?()A.提高管道和
隧道周边位移量测,确定初读数时要求连续量测3次的误差()。A:≤0.10mm
患者25岁,已婚。停经80天,阴道少量出血10天,无腹痛,妇科检查子宫增大如孕4
以下情形中,不构成主板上市公司发行可转换公司债券障碍的有()。[2015年5月
教师绩效考核应当遵循如下原则()。A.客观公正 B.分类考核 C.注
(2021年上半年真题)同学们正在教室里聚精会神地听老师讲课,突然从教室外飞进来
简述现代企业人力资源管理各个历史发展阶段的特点。
教育法律关系是一种()关系。 A.权利义务B.诚信C.合同D.社会契约
最新回复
(
0
)