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
In August, environmentalists in the Philippines vandalized(肆意破坏)a field of Golden Rice, an experimental grain whose genes had be
In August, environmentalists in the Philippines vandalized(肆意破坏)a field of Golden Rice, an experimental grain whose genes had be
admin
2018-11-19
18
问题
In August, environmentalists in the Philippines vandalized(肆意破坏)a field of Golden Rice, an experimental grain whose genes had been modified. Its seeds will be handed out free to farmers. The aim is to improve the health of children in poor countries by reducing vitamin A deficiency, which
contributes to
hundreds of thousands of premature deaths and cases of blindness each year.
Environmentalists claim that these sorts of actions are justified because genetically modified crops pose health risks. Now the main ground for those claims has crumbled. Last year a paper which was published in a respected journal found that unusual rates of tumours and deaths in rats that had been fed upon a variety of genetic modification(GM)(转基因)corn. Other studies found no such effects. But this one enabled campaigners to make a health-and-safety argument against GM crops—one persuasive enough to influence governments. After the study appeared, Russia suspended imports of the grain in question. Kenya banned all GM crops. And the French prime minister said that if the results were confirmed he would press for a Europe-wide ban on the GM corn.
There is now no serious scientific evidence that GM crops do any harm to the health of human beings. There is plenty of evidence, though, that they benefit the health of the planet. One of the biggest challenges facing mankind is to feed the 9 billion-10 billion people who will be alive and richer in 2050. This will require doubling food production on roughly the same area of land, using less water and fewer chemicals. It will also mean making food crops more resistant to the droughts and floods that seem likely if climate change is as bad as scientists fear.
If the Green revolution had never happened, and yields had stayed at 1960 levels, the world could not produce its current food output even if it ploughed up every last acre of cultivable land. In contrast, GM crops boost yields, protecting wild habitat from the plough. They are more resistant to the vagaries of climate change, and to diseases and pests, reducing the need for agrochemicals. Genetic research holds out the possibility of breakthroughs that could vastly increase the productivity of farming.
Vandalizing GM field trials is a bit like the campaign of some religious leaders to prevent smallpox inoculations: it causes misery, even death, in the name of unscientific belief.
The phrase "contributes to"(Para. 1)probably means______.
选项
A、brings to
B、leads to
C、results from
D、introduces into
答案
B
解析
词汇题。根据短文第一段第三句中的reducing vitamin A deficiency与hundreds of thousands of premature deaths and cases of blindness是原因和结果的关系,contribute to意为“是导致……的原因之一”,前因后果。故选项B正确。
转载请注明原文地址:https://kaotiyun.com/show/kr47777K
0
大学英语四级
相关试题推荐
A、Itisapopularsport.B、Ithasalonghistory.C、Itisrarelytriedasecondtime.D、Itisanadventurousactivity.D短文开篇即提到现
A、Highrentingfees.B、Costlytravelingexpenses.C、Highcostsofgroceries.D、Highcostsofeducation.C短文最后提到,大部分亚洲城市名列前茅主要是因为
Millionsofteenagersareindangerofputtingtheirhealthatriskbygettinghookedone-cigarettes,expertswarn.Leadinghea
A、Competitionfromrivalcompanies.B、Productpromotioncampaigns.C、Possiblelocationsforanewfactory.D、Measurestocreate
A、Theyworkontheirfarms.B、Theyworkinthetouristindustry.C、Theyraisedomesticanimals.D、Theymaketraditionalhandicra
A、Togosightseeing.B、Tohavemeetings.C、Topromoteanewchampagne.D、Tojoininatrainingprogram.B对话开头男士问Angela美国之行如何,Ang
A、Angry.B、Surprised.C、Indifferent.D、Worried.A听音重点是顾客听到店员说他不会戴耳机后的反应。由男士提到Look,Iknowhowtoputtheearphonesinmyears.Tha
A、Givingupsmoking.B、Birthcontrolofthefamily.C、Planforseeingadoctor.D、Arrangementforbreakingengagement.A主旨大意题。男女
A、India.B、ThePhilippines.C、Egypt.D、Notmentioned.B信息明示题。由Andthentheotherinterestingthingswere,likethePhilippines,th
随机试题
体内调节血钙水平最重要的激素是()
A.内庭B.厉兑C.侠溪D.足窍阴E.行间在足背,当第1、第2趾间,趾蹼缘的后方赤白肉际处的穴位是
患者高热神昏,身目色深黄,腹胀便秘躁动,鼻衄发斑,舌绛苔黄褐干燥,脉弦数。首先宜用
女,48岁。近1个月来出现口渴。每日饮水量约2000ml。身高156cm,体重70kg。患者空腹血糖12.0mmol/L,餐后血糖14.8mmoL/L。过去无糖尿病病史。【假设信息】4年后该患者被发现有浸润性肺结核,降血糖治疗宜选用
A.潮解B.粘连C.腐烂D.虫蛀E.霉变青盐易变异的现象是()。
某调查报告标题为《江岸区私营企业考察报告》,这种标题属于()。
《雷雨》中在爱情上表现了最强烈抗争精神的女性是()。
2016年全国供用水总量为6040.2亿立方米,较上年减少63.0亿立方米。其中,地表水源供水量4912.4亿立方米,占供水总量的81.3%;地下水源供水量1057.0亿立方米,占供水总量的17.5%;其他水源供水量70.8亿立方米
曲线2x2一xy+4y2=1的名称是________。
磁悬浮列车
最新回复
(
0
)