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 recent years a new farming revolution has begun, one that involves the 【21】______ of life at a fundamental level—the gene.
In recent years a new farming revolution has begun, one that involves the 【21】______ of life at a fundamental level—the gene.
admin
2010-07-06
29
问题
In recent years a new farming revolution has begun, one that involves the 【21】______ of life at a fundamental level—the gene. The study of genetics has 【22】______ a new industry called biotechnology. As the name suggest, it 【23】______ biology and modem technology through such techniques as genetic engineering. Some of the new biotech companies specialize in agriculture and are working feverishly to 【24】______ seeds that give a high yield, that 【25】______ diseases, drought and frost, and that reduce the need for 【26】______ chemicals. If such goals could be achieved, it would be most 【27】______ . But some have raised concerns about genetically engineered crops.
In nature, genetic diversity is created within certain 【28】______ . A rose can be crossed with a different kind of rose, but a rose will never cross with a potato. Genetic engineering, 【29】______ usually involves taking genes from one species and inserting them into another 【30】______ to transfer a desired Characteristic. This could mean, for example, selecting a gene which leads to the production of a chemical with antifreeze 【31】______ from an artic fish, and inserting it into a potato or strawberry to make it frost-resistant. 【32】______ , then, biotechnology allows humans to 【33】______ the genetic walls that separate species.
Like the green revolution, 【34】______ some call the gene revolution contributes to the problem of genetic uniformity—some say even more so 【35】______ geneticists can employ techniques such as cloning and 【36】______ culture(培养), processes that produce perfectly 【37】______ copies. Concerns about the erosion of biodiversity, therefore, remain. Genetically altered plants, however, raise new 【38】______ , such as the effects that they may have on us and the environment. "We are flying blindly into a 【39】______ of agricultural biotechnology with high hopes, few constraints, and little idea of the potential 【40】______ ," said science writer Jeremy Rifkin.
【24】
选项
A、hatch
B、train
C、duplicate
D、patent
答案
C
解析
上文已经提到基因工程,根据常识,基因工程与繁衍生命有关,即C 项 duplicate“复制,重复”符合句子的逻辑关系。hatch “孵出,孵化”。
转载请注明原文地址:https://kaotiyun.com/show/KMDd777K
本试题收录于:
公共英语四级笔试题库公共英语(PETS)分类
0
公共英语四级笔试
公共英语(PETS)
相关试题推荐
Agingbabyboomersaredeterminedtofighttheagingprocess.Theyspendmillionsofdollarsayearon【C1】________theyperceive
ThespeakerthinksthattobeateacherismoredifficultthantobethepresidentoftheNEA.Thespeakerwantstochangethe
ThespeakerthinksthattobeateacherismoredifficultthantobethepresidentoftheNEA.Thespeakerthoughthedidther
WhatishappeninginAustralia’sagriculturalindustry?
DoesthepublisherofDouglasStarr’sexcellentBlood—AnEpicHistoryofMedicineandCommerceactuallyexpecttosellmanycopi
Whatisthemostfundamentaldifferencebetweenplantsandanimals?
FamilyrelationshavechangedinrecentyearsinChina,aswehavemoreandmoreone-childfamilies.Theonlychildinthefamil
Amultinationalcorporationisacorporateenterprise,whichthoughheadquarteredinonecountry,conductsitsoperationsthroug
随机试题
转移定价可以规避的风险包括()
不符合新月体性肾小球肾炎的描述是
A.差示双波长紫外分光光度法B.磺胺嘧啶片的含量测定C.碘-碘化钾试液D.甲醛-硫酸试液E.甲醛硫酸试液
某股份有限公司2×17年年度财务报告经注册会计师审计后,于2×18年4月25日批准报出。该公司对下列发生在2×18年1月1日至4月25日的事项的会计处理中,正确的有()。
若收集了n组数据(xi,yi),(i=1,2,…,n),求得两个变量间的相关系数为1,则下列说法正确的是()。
武术运动的手型有_______、_______、_______;步型有_______、_______、_______、虚步、歇步。
财政政策,是指政府根据既定目标,通过财政收支的变动以影响宏观经济水平的经济政策,当通货膨胀出现的时候,紧缩性财政政策能够发挥一定的作用。以下属于紧缩性财政政策的主要手段的是()。
简述人力资源和社会保障部的主要职责。
(2015广东)某乡镇举行运动会,共有长跑、跳远和短跑三个项目。参加长跑的有49人,参加跳远的有36人,参加短跑的有28人,其中只参加两个项目的有13人,参加全部项目的有9人。那么参加该次运动会的总人数为:
EuthanasiahasbeenatopicofcontroversyinEuropesinceatleast1936.Onanaverageofsixtimesaday,adoctorinHolland
最新回复
(
0
)