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
54
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.
【C12】
选项
A、In essence
B、In part
C、In advance
D、In return
答案
A
解析
转载请注明原文地址:https://kaotiyun.com/show/Z3w7777K
0
大学英语四级
相关试题推荐
BritishCuisine:theBestofOldandNewBritishcuisine(烹饪)hascomeofageinrecentyearsaschefs(厨师)combinethebest
BritishCuisine:theBestofOldandNewBritishcuisine(烹饪)hascomeofageinrecentyearsaschefs(厨师)combinethebest
BritishCuisine:theBestofOldandNewBritishcuisine(烹饪)hascomeofageinrecentyearsaschefs(厨师)combinethebest
BritishCuisine:theBestofOldandNewBritishcuisine(烹饪)hascomeofageinrecentyearsaschefs(厨师)combinethebest
BritishCuisine:theBestofOldandNewBritishcuisine(烹饪)hascomeofageinrecentyearsaschefs(厨师)combinethebest
Asksomeonewhattheyhavedonetohelptheenvironmentrecentlyandtheywillalmostcertainlymentionrecycling.Recyclingin
Asksomeonewhattheyhavedonetohelptheenvironmentrecentlyandtheywillalmostcertainlymentionrecycling.Recyclingin
Asksomeonewhattheyhavedonetohelptheenvironmentrecentlyandtheywillalmostcertainlymentionrecycling.Recyclingin
随机试题
下列中属于渗透性利尿的是()。
下列带点的字解释错误的是
男性,55岁。有慢性支气管炎病史10多年,1周来出现高热,咳嗽、咳痰加重,痰液黏稠呈砖红色胶冻状。该患者最可能的诊断是
患者,男,42岁。左下肢静脉曲张15年,逐渐加重。查体:左小腿大隐静脉重度曲张,胫前凹陷性肿胀。了解深静脉瓣膜功能的损害程度采用
患者,女性,36岁,诊断为特发性血小板减少性紫癜,入院后告知患者禁用的药物是()
暂定金额由()批准使用。
某工程实行公开招标,招标文件规定,投标人提交投标文件截止时间为3月22日下午5点整。投标人D由于交通拥堵于3月22日下午5点10分送达投标文件,其后果是()。
基金净值收益率的计算方法不包括()
某企业为增值税一般纳税人,2019年9月经营状况如下:(1)生产食用酒精一批,将其中的50%用于销售,开具的增值税专用发票注明金额10万元、税额1.3万元。(2)将剩余50%的食用酒精作为酒基,加入食品添加剂调制成38度的配制酒,当月全部销售,
StellaWemightmarvelattheprogressmadeineveryfieldofstudy,butthemethodsoftestingaperson’sknowledgeandabi
最新回复
(
0
)