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
55
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.
【31】
选项
A、quality
B、property
C、priority
D、quantity
答案
A
解析
quality “质量,属性,优点”,根据上下文的意思,只有A项符合句意。Priority“居要位,优先”;quantity“量,大小,重量”。
转载请注明原文地址:https://www.kaotiyun.com/show/iMDd777K
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.Mostteachersaregenerallycons
TherecentsocialandeconomicchangesintheU.S.havegreatimpactonalltheAmericanhousingsystem.Mobilehousesarebui
TherecentsocialandeconomicchangesintheU.S.havegreatimpactonalltheAmericanhousingsystem.Livingundergroundca
【61】Womenmakeup40percentoftheworld’sworkforceinagriculture,aquarterinindustry,andathirdinservices.Womenfa
NewfiguresfromFrance,GermanyandItaly--thethreebiggesteconomiesinthe12-countryEurozone-suggestthecontinent’sec
WhatisCathyfedupwith?______onpackingcases
随机试题
1927年中国出现最早的旅游组织中国旅行社,其创始人是()。
A.呕吐出现早且频繁呕吐物为胃及十二指肠内容物B.呕吐出现晚,呕吐物常伴有粪臭物C.呕吐物呈褐色或血性D.呕吐为溢出性E.喷射状呕吐麻痹性肠梗阻
从胆汁排泄进入到小肠的药物中,有些脂溶性药物可被重吸收,经肝脏进入血液循环,这种现象称为
在深圳证券交易所,结算登记费是成交金额的()。
下列关于资本监管的要求,说法正确的是()。
出票的大写日期未按要求规范填写的,银行可以受理,但由此造成损失的,由()承担。
日志文件的主要作用是处理数据库的()。
关于纳米材料的说法,不正确的是()。
Поставьтеящикнастол.____осторожно,тампосуда.
In"Welistenedeagerly,forhebroughtnewsofourfamilies","for"isusedtoindicate
最新回复
(
0
)