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
2018-02-08
46
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/Mwa7777K
0
大学英语四级
相关试题推荐
Becauseofsatellitelinkswhichnowenablebroadcastnewsorganizationstooriginateliveprogrammingfromanypartoftheglob
A、Allmenarecreatedequal.B、Thewoundedanddyingshouldbetreatedforfree.C、Awoundedsoldiershouldsurrenderbeforehe
A、FirstSundayinJune.B、SecondSundayinJune.C、ThirdSundayinJune.D、DecidedbyeachPresident.C短文说,“父亲节是6月的第三个星期日”,据此判断
A、Itisefficient.B、Itisexciting.C、Itisconvenient.D、Itisdangerous.D短文开头处however后的内容是听力重点。听到theaveragecitizendislike
A、Thephotography.B、Thecommunicationsofficer.C、Thedoctor.D、Theplot.C父亲认为摄影很假,通讯官有点奇怪,故事情节也不可信,所以只有C是正确的。在对话中,父亲除了对医生的评价是
ToHelptheKids,ParentsGoBacktoSchool[A]Forafewyearsnow,everyparentofanewbornbabyintheSouthFloridadistrict
Sixyearsago,aMiamiwomanwalkingthroughthehallofanofficebuildingcasuallynoticedtwomenstandingtogether.Several
A、Governmentofficersarehardtoplease.B、Thelearnerhastogothroughseveraltoughtests.C、Thelearnerusuallyfailssever
A、Gettingalongwellwithcolleagues.B、Payingattentiontoeverydetail.C、Planningeverythinginadvance.D、Knowingtheneeds
Trytoimaginewhatitisliketolivewithoutelectricity.Itisboring,【C1】______onething—notelevision,noMP3player,novi
随机试题
在防火墙体系结构中,使用哪种结构必须关闭双网主机上的路由分配功能_______
据不完全统计,中国市场上有不同的手机型号1700多种。但一款新产品从投入市场到进入衰退期可能只有短短一年时间,这是由于【】造成的风险。
微分方程y’’+y=ce-x的特解形式应设为()
以纤维素样坏死为基本病变的动脉炎有
一病人。某日突然出现阵发性抽搐,表现意识丧失,眼球上窜,瞳孔散大,口唇青紫.全身抽搐,有舌咬伤,尿失禁。持续约3分钟。发作后入睡,意识清醒后对上述情况不能回忆。初步考虑为
最基本的会计等式是()。
因为近几年来气候变化,原来春夏多在秦岭深山生活的花杜鹃逐渐迁移到东北大兴安岭,就在花杜鹃在大兴安岭大量繁殖的时候,柳莺的数量却在大量减少。由于花杜鹃的食物和柳莺完全不同,所以柳莺的大量减少与花杜鹃的大量增加无关。以下哪项如果正确最能削弱上述结论?()
慢性疲劳综合症(CFS)这种疾病究竟属于生理方面还是属于心理方面尚未确定。病理学家做了如下实验:第一组患者被指定服用一种草药软膏.并告诉他们这种软膏是在试用过程中,其中30%的人在接受治疗的3个月内被治愈;第二组患者接受同样的草药软膏治疗,但告诉他们这种软
求幂级数的和函数.
A、Hewillreconsiderthewoman’spositionlater.B、Hewillallowthewomantomissclass.C、Heshouldconsiderloweringthewoma
最新回复
(
0
)