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【C1】______of life at a fundamental level--the gene. The
In recent years a new farming revolution has begun, one that involves the【C1】______of life at a fundamental level--the gene. The
admin
2012-12-13
72
问题
In recent years a new farming revolution has begun, one that involves the【C1】______of life at a fundamental level--the gene. The study of genetics has【C2】______a new industry called biotechnology. As the name suggest, it【C3】______biology and modern technology through such techniques as genetic engineering. Some of the new biotech companies specialize in agriculture and are working feverishly to【C4】______seeds that give a high yield, that【C5】______diseases, drought and frost, and that reduce the need for【C6】______chemicals. If such goals could be achieved, it would be most【C7】______. But some have raised concerns about genetically engineered crops.
In nature, genetic diversity is created within certain【C8】______. A rose can be crossed with different kind of rose, but a rose will never cross with a potato. Genetic engineering,【C9】______usually involves taking genes from one species and inserting them into another【C10】______to transfer a desired characteristic. This could mean, for example, selecting a gene which leads to a production of a chemical with anti-freeze【C11】______from an arctic fish, and inserting it into a potato or strawberry to make it frost-resistant.【C12】______, then, biotechnology allows humans to【C13】______the genetic walls that separate species.
Like the green revolution,【C14】______some call the gene revolution contributes to the problem of genetic uniformity--some say even more so【C15】______geneticists can employ techniques such as cloning and【C16】______culture (培养), processes that produce perfectly【C17】______copies. Concerns about the erosion of biodiversity, therefore, remain. Genetically altered plants, however, raise new【C18】______such as the effects that they may have on us and the environment. "We are flying blindly into a new【C19】______of agricultural biotechnology with high hopes, few constraints, and little idea of the potential【C20】______," said science writer Jeremy Rifkin.
【C6】
选项
A、hostile
B、hydraulic
C、hazardous
D、harmless
答案
A
解析
转载请注明原文地址:https://kaotiyun.com/show/ztw7777K
0
大学英语四级
相关试题推荐
Thepopularnotionthatolderpeopleneedlesssleepthanyoungeradultsisamyth,scientistssaidyesterday.Whileelderly
Thepopularnotionthatolderpeopleneedlesssleepthanyoungeradultsisamyth,scientistssaidyesterday.Whileelderly
Thepopularnotionthatolderpeopleneedlesssleepthanyoungeradultsisamyth,scientistssaidyesterday.Whileelderly
BritishCuisine:theBestofOldandNewBritishcuisine(烹饪)hascomeofageinrecentyearsaschefs(厨师)combinethebest
BritishCuisine:theBestofOldandNewBritishcuisine(烹饪)hascomeofageinrecentyearsaschefs(厨师)combinethebest
Asksomeonewhattheyhavedonetohelptheenvironmentrecentlyandtheywillalmostcertainlymentionrecycling.Recyclingin
Asksomeonewhattheyhavedonetohelptheenvironmentrecentlyandtheywillalmostcertainlymentionrecycling.Recyclingin
Asksomeonewhattheyhavedonetohelptheenvironmentrecentlyandtheywillalmostcertainlymentionrecycling.Recyclingin
Asksomeonewhattheyhavedonetohelptheenvironmentrecentlyandtheywillalmostcertainlymentionrecycling.Recyclingin
Asksomeonewhattheyhavedonetohelptheenvironmentrecentlyandtheywillalmostcertainlymentionrecycling.Recyclingin
随机试题
HowWorkWillChangeWhenMostofUsLiveto100A)TodayintheUnitedStatesthereare72000centenarians(百岁老人).World
A.直接食用B.高温处理C.冷冻或盐腌处理D.工业用E.销毁畜肉40cm2肌肉上囊尾蚴少于3个应如何处理
缩窄性心包炎继发于_______,在我国,以_______最为常见,其次为化脓性或创伤性心包炎后演变而来。
《药品管理法》规定,国家实行药品不良反应
小贩与顾客发生争执,互相殴打。小贩因身强力壮,欲置顾客于死地。该顾客见自己打不过,爬起来夺路而逃,该小贩穷追不舍。顾客在无路可逃时,掏出随身携带的铁棒转身一棒,将小贩打昏在地。对该顾客的行为应如何定性:
关于矿用高压配电箱的种类,下列正确的是()。
目前我国银行最安全和最具流动性的中长期投资品种是()。
对于将权益性投资划分为可供出售金融资产核算时,如果该投资发生的减值迹象已经消失,则应当通过()科目进行转回。
讨论级数的敛散性.
随着网购的进一步盛行,小型城市的消费者有了新的购物目标,从网店购买平价奢侈品(affordableluxury)。这些消费者年龄在25岁到40岁之间。借助网络,他们购买了很多昂贵的服装、手包和配饰(accessories)。不同于“冲动型”消费者(imp
最新回复
(
0
)