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
2023-08-29
12
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] What is the main factor leading to a huge underfed population in developing countries?
选项
A、Crop failure.
B、Poverty.
C、Food shortage.
D、Overpopulation.
答案
B
解析
细节辨认题。题干中的underfed意为“吃不饱的”,是对原文中hunger的同义转述。文章指出,发展中国家作物歉收只是造成饥饿的一个原因,贫穷才是罪魁祸首。
转载请注明原文地址:https://tihaiku.com/zcyy/2966631.html
相关试题推荐
Whatisthepassagemainlyconcernedwith?[br]Whichofthefollowing,statemen
[originaltext]AbouttwopercentofthepopulationoftheUnitedStatesiso
[originaltext]AbouttwopercentofthepopulationoftheUnitedStatesiso
[originaltext]AbouttwopercentofthepopulationoftheUnitedStatesiso
【B1】[br]【B5】A、growthB、upbringingC、cultivationD、expansionBgrowth“成长,生长”;upb
Inthedevelopedcountries____________(技术使获得充足的粮食供给成为可能).technologyhasmadeit
[originaltext]M:You’regoingtoSoutheastAsiancountriesforaholidaysoon,
[originaltext]M:You’regoingtoSoutheastAsiancountriesforaholidaysoon,
Bysaying"thegrowthoftheproportion...toyoungergenerations."(Line2,Para
Bysaying"thegrowthoftheproportion...toyoungergenerations."(Line2,Para
随机试题
[originaltext]M:Ireallydon’tknowwhattodothissummer.Ican’taffordto
某公司发生火灾,此时应采用()等紧急应对措施。A.立即拉响警报铃 B.打开防
应用最广泛的一种敷设方式是不通行地沟,以下不属于其适用情况的是()。A.地下
校准和检定一样,要对所检的测量器具做出合格与否的结论。()
5岁男孩,高热1天,食欲不振,流涎。查体:T39.6℃,咽部充血,软腭部可见数
治疗急、慢性骨髓炎宜选用()。A.青霉素G B.多粘菌素类 C.克林霉素
(2016年真题)某企业期初存货200万元。期末存货300万元,本期产品销售收入
属于β受体阻断药的药物是A:卡托普利 B:维拉帕米 C:硝酸异山梨醇酯 D
霍奇金淋巴瘤伴明显纤维增生的组织学类型是 A.结节性淋巴细胞为主型B.结节硬
电离层对电波的反射,和我们平时照镜子的原理很像。在日常生活中,我们几乎天天都要照
最新回复
(
0
)