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
42
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.
【22】
选项
A、got along with
B、given rise to
C、come up with
D、lived up to
答案
B
解析
根据句子的逻辑关系:“这场基因项目的研究已经引起了……”,即B项 give rise to“引起……,产生”符合句意。come up with “找出或提出答案、办法等”。live up to 符合某事物的原则。
转载请注明原文地址:https://kaotiyun.com/show/z0Dd777K
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
WhatcanbesaidaboutthereportbytheNationalAcademyofSciences?Whathinderstheextensiveuseofrenewableenergysourc
ThespeakerthinksthattobeateacherismoredifficultthantobethepresidentoftheNEA.Thespeakerwantstochangethe
WhatishappeninginAustralia’sagriculturalindustry?
DoesthepublisherofDouglasStarr’sexcellentBlood—AnEpicHistoryofMedicineandCommerceactuallyexpecttosellmanycopi
HowhavetheoncereasonablypricedholidaysinEuropebecometoAmericans?Howmusttheshiftsinthevalueofthedollarbei
Therehasbeenadiscussionrecentlyontheissueofchallengeinanewspaper.Somepeoplethinkchallengeisakindofimpetus,
Amultinationalcorporationisacorporateenterprise,whichthoughheadquarteredinonecountry,conductsitsoperationsthroug
Amultinationalcorporationisacorporateenterprise,whichthoughheadquarteredinonecountry,conductsitsoperationsthroug
Weholdsthesetruthstobeselfevidentthat______.
随机试题
Allpossiblemeans________topreventairpollution,butitdoesn’tseemtomakemuchdifference.
A.第Ⅱ期(脂质条纹期)B.第Ⅲ期(粥样硬化前期)C.第Ⅳ期(粥样斑块期)D.第Ⅴ期(纤维斑块期)E.第Ⅵ期(复杂病变期)动脉粥样硬化病理变化中病变处内皮细胞下出现平滑肌细胞,属于
糖浆剂的外文缩写是
A.内毒素B.肠毒素C.神经毒素D.细胞毒素E.红疹毒素伤寒沙门菌产生
原始社会规范是以习惯为表现形式并依靠氏族部落领袖的威信、社会舆论和人们的自觉遵守来保证实施的特殊社会规范。而习惯法是法的一种重要形态。下列有关原始社会规范和习惯法的说明中,不正确的是哪一或哪些选项?()
注册会计师实施的下列各项审计程序中,能够证实银行存款是否存在的有()。
在系统科学发展领域,被称为“新三论"的是()。
A城市每立方米水的水费是B城市的1.25倍,同样是交20元的水费,在B城市比在A城市可多用2立方米水,那么A城市每立方米的水费是()元。
由司法机关监督宪法的实施起源于()。
Readthefollowingpassage.ChoosefromthesentencesA—Gtheonewhichbestfitseachgapof61—65.Therearetwoextrasenten
最新回复
(
0
)