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
Genetic engineering, the process of splicing (连接) together DNA from different organisms to create a preferred type of plant o
Genetic engineering, the process of splicing (连接) together DNA from different organisms to create a preferred type of plant o
admin
2010-06-11
27
问题
Genetic engineering, the process of splicing (连接)
together DNA from different organisms to create a preferred
type of plant or animal, is a relatively new development
in agriculture. The first successful experiment
was achieved in 1973. Despite of its recent emergence, 【S1】______
however, genetic engineering--particularly in the area of
agriculture--has proliferated swiftly. Few Americans can
now avoid genetically altered food altogether, but it’s 【S2】______
estimated that modified ingredients are present in about two-thirds
of the foods in American supermarkets.
Supporters of genetic engineering have argued that
this application of science allows farmers to grow crops
more efficiently and to save money on pesticides and fertilizers.
Fewer chemicals, they say, will be benefit for 【S3】______
the environment and reduce health risks for farm workers.
Opponents of genetic engineering make the claim
that scientists are tampering (损害) with matters that
they know too little and essentially committing a crime 【S4】______
against nature. It’s impossible, they maintain, for people
to see the possible consequences that genetic engineering 【S5】______
could wreak (带来) on the environment and on the
health of human beings. 【S6】______
Greenpeace activists objected on farmers’ use of corn
that had been genetically modified to resist corn borers
(玉米螟)--pests that were costing farmers up to a billion 【S7】______
dollars a year in mined crops. No one admitted that
the genetic change had benefited the corn plants. But
how would it impact upon the rest of the environment?
Studies variously supported both sides of the argument 【S8】______
, and thus proved conclusive. However, the protest
cut to the heart of the genetic engineering controversy by 【S9】______
demonstrating what unprepared both the scientists and
their opponents were to gauge (测量, 评估) the long-term
effects of introducing changes into living beings.
Perhaps, like most forms of technological innovation, genetic
engineering will come to display both its benefits 【S10】______
and obvious drawbacks--many of which will be so apparent
until mankind has pursued the experiment for some
time.
【S2】
选项
答案
but→as
解析
转载请注明原文地址:https://kaotiyun.com/show/8CKK777K
0
大学英语六级
相关试题推荐
A、Hewasfired.B、Hissalarywasreduced.C、Hewasdemoted.D、Nothinghappenedtohim.AW:Withthecompanyinsuchfinancialdif
Accordingtotheauthor,whatmaybethepossiblecarriersofbirdflu?Themainsourcesofinfluenzavirusesinlakewaterare
A、Attendingtheparty.B、Visitingsomefriends.C、Studyingforanexam.D、Writingaletterofapology.CW:Hi.Bob.Comeonin.
A、Heneverdoesthingsearly.B、Hehasalreadyfinishedit.C、Heisn’tgoingtofinishit.D、Hewillfinishitinafewminutes.
A、Theycandobetterthanothers.B、Itisexpensivetohirelabour.C、Theydon’tliketobehelped.D、Theydon’ttrustothers.B
A、Healwayslikedreadingmorethanwatchingtelevision.B、Heusedtowatchtelevisionmorethanhedoesnow.C、It’simportantt
A、Hisphysicalappearanceandhisaction.B、Hiswayofspeakingandbehaving.C、Hislearningandbehaviour.D、Hiswayofacting
A、Becausetheydonothaveenoughmotivation.B、Becausetheyaresoyoungthattheyaredeprivedofchancestowork.C、Becauset
Depression:TheHiddenEpidemicFeltdown?Gottheblues?You’renotalone.Everyonegetssad(yes,everyoneyou’veevermet
A、Shecan’tgivethestampstotheman’sbrother.B、Shehasgiventhestampstotheman’sneighbor.C、Shelikescollectingstamp
随机试题
有一位百岁老人出生于二十世纪,2015年他的年龄各数字之和正好是他在2012年的年龄的各数字之和的三分之一,问该老人出生的年份各数字之和是多少(出生当年算作0岁)?
在岩土参数标准值计算中,常采用公式此式在统计学中采用的单侧置信概率为()。
()不得办理托收承付结算。
开户银行对已开户的但一年内未发生业务的单位银行结算账户,应通知单位自发出通知之日起()日内到开户银行办理销户手续,逾期视同自愿销户,未划转款项列入久悬未取专户管理。
关于波浪理论说法中,正确的是()。
目前我国货币市场基金不得进行投资的金融工具主要包括()。Ⅰ.股票Ⅱ.可转换债券Ⅲ.剩余期限超过365天低于397天的债券Ⅳ.信用等级在AAA级以下的企业债券
20世纪90年代初,鲍元恺以24首脍炙人口的中国民歌为素材创作的管弦乐组曲是()
营养:健康
阅读下列说明、图和C++代码,回答问题。[说明]已知四个类之间的关系如图12-3所示,分别对每个类的方法进行编号,例如,Shape的perimeter()方法为1号,表示为“1:perimeter()”,Rectangle类
20世纪70年代开始,美国、英国、德国等发达国家开始进行无人驾驶汽车的研究,在可行性和实用化方面都取得了突破性的进展。但无人驾驶汽车的发展仍然处于萌芽状态。迄今为止,谷歌在2012年推出的自动驾驶汽车发生了14次轻微事故。如果得到完善,无人驾驶汽车可以为每
最新回复
(
0
)