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
Genetically Modified Foods If you want to spark a heated debate at a dinner party, bring up the topic of genetically modifie
Genetically Modified Foods If you want to spark a heated debate at a dinner party, bring up the topic of genetically modifie
admin
2013-01-28
41
问题
Genetically Modified Foods
If you want to spark a heated debate at a dinner party, bring up the topic of genetically modified foods. For many people, the concept of genetically altered, high-tech crop production raises all kinds of environmental, healthy, safety and ethical questions. Particularly in countries with long grain traditions-and vocal green lobbies—the idea seems against nature.
In fact, genetically modified foods are already very much a part of out lives. A third of the corn and more than half the soybeans and cotton grown in the U.S. last year were the product of biotechnology, according to the Department of Agriculture. More than 65 million acres of genetically modified crops will be planted in the U.S. this year. The genetic genie(妖怪)is out of the bottle.
Yet there are clearly some very real issues that need to be resolved. Like any new product entering the food chain, genetically modified foods must be subjected to rigorous testing. In wealthy countries, the debate about biotech is tempered by the fact that we have a rich array of foods to choose from and a supply that far exceeds our needs. In developing countries desperate to feed fast-growing and underfed populations, the issue is simpler and much more urgent: Do the benefits of biotech outweigh the risks? The statistics on population growth and hunger are disturbing. Last year the world’s population reached 6 billion. The U. N. estimates that nearly 800 million people around the world are undernourished. The effects are devastating. About 400 million women of child-bearing age are iron deficient, which means their babies are exposed to various birth defects. As many as 100 million children suffer from vitamin A deficiency, a leading cause of blindness.
How can biotech help? Biotechnologists have developed genetically modified rice that is fortified with beta-carotene-which the body converts into vitamin A and additional iron, and they are working on other kinds of nutritionally improved crops. Biotech can also improve farming productivity in places where food shortages are caused by crop damage attributable to pests, drought, poor soil and crop viruses, bacteria or fungi.
According to the passage, biotech can help solve the problem by______.
选项
A、producing foods that contain more nutrients needed by human beings
B、creating more varieties of foods
C、producing beta-carotene and vitamin A more efficiently
D、producing anti-virus crops
答案
A
解析
根据最后一段,生物技术的作用在于:一是加强农作物营养含量,二是提高农业生产率,所以A项符合题意。
转载请注明原文地址:https://kaotiyun.com/show/MeLd777K
本试题收录于:
职称英语理工类A级题库职称英语分类
0
职称英语理工类A级
职称英语
相关试题推荐
AdaptationofLivingThingsCertainanimalsandplantsdevelopcharacteristicsthathelpthemcopewiththeirenvironmentbe
FluShotsOrNot?ItsoundedlikeagoodideawhenNewYorkCity’smayor,RudollphGiuliani,advisedNewYorkersrecentlyto
FluShotsOrNot?ItsoundedlikeagoodideawhenNewYorkCity’smayor,RudollphGiuliani,advisedNewYorkersrecentlyto
DuringtheApril28earthquake,thewholeEnglandwasleftwithoutpower.Mussonpredictedthatanotherearthquakewouldoccur
AvalancheandItsSafetyAnavalancheisasuddenandrapidflowofsnow,oftenmixedwithairandwater,downamountainside.A
TravelandTourism1.Remoteplaceswithstrange-soundingnamesattractthetravellerwithpromisesofexcitement,differentform
Theauthoriskindtothechildrenbecauseshewantedtoplayanimportantroleinthechildren’slives.Aserious-lookingman
IrarelyweararaincoatbecauseIspendmostofmytimeinacar.
HousesoftheFutureWhatwillhousesbelikeinthirtyyears’time?Noonereallyknows,butarchitectsaretryingtopredict
Thewaterinthispartoftheriverhasbeencontaminatedbysewage(污水)
随机试题
货币的本质是通过货币的________表现出来的。()
腰椎间盘突出的典型X线平片表脱有
A.产后腹痛B.产后发热C.产后血晕D.产后痉病E.产后恶露不绝
工程保险中属于强制保险的是()。
()是从资产最高价格到接下来最低价格的损失。
今天,我们已经进入了一个________的“微时代”。微博、微信、微电影、微小说、微媒体、微广告……所有这些以去中心化、动态化、碎片化、零散化、即时化为特征的新兴的传播方式、文化形态乃至经济活动形态、日常生活形态,已经在________间深刻影响了我们的时
专家对一批刚出土的古代钱币进行鉴定,星期一鉴定了总数的35%,星期二和星期三分别鉴定了前一天剩下的星期四鉴定完了所有剩下的钱币。问这批钱币至少有多少个?
明代申明亭不能受理决断的案件是()。
Earlierthismonth,afterthefederalgovernmentsaidvaccinesaggravatedanunderlyingdisorderthatledtoautism-likesymptom
有如下程序:#include#includeusingnamespacestd;classAnimal{public:virtualstring
最新回复
(
0
)