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
专升本
Across the United States, scientists are mounting what may become the most innovative agricultural research drive since the 1920
Across the United States, scientists are mounting what may become the most innovative agricultural research drive since the 1920
admin
2011-04-26
62
问题
Across the United States, scientists are mounting what may become the most innovative agricultural research drive since the 1920s,when hybrid corn was developed. Surprisingly, the new genetic revolution is not taking place in America’s fields.
Instead, it is occurring in biology laboratories, for it involves the deliberate manipulation in test tubes of the genes of crop plants.
This genetic engineering may prove the biggest boon to agriculture since plant breeding began.
The new concepts grew out of the bioengineering of bacteria for the production of such things as human hormones and vaccines for viral diseases. Plant cells, however, are far more complex than bacteria, and it will probably take many years for today’s encouraging laboratory results to have a major impact on the farm. In fact the payoff may not come until the next century.
But although biotechnologists are still in the earliest phases of this new field of science, they are already actively exploring ways to redesign plants so they will use sunlight more efficiently, resist viruses and other pests, grow in hot or dry areas, in saline soils or in the presence of pesticides, and perhaps even make their own fertilizer out of nitrogen in the air. In addition, scientists have had early success in making wholly new plants that are unavailable by conventional plant breeding--a potato-tomato combination, for example.
The new technology holds the promise of virtually limitless horizons in food production. Only imagination sets the limits: frost-resistant wheat, tropical potatoes, saltwater rice, a plant producing a combination of a pea and a carrot--all may be with us one day.
The overall effect of this passage is likely to make the reader feel ______.
选项
A、enthusiastic about biotechnology
B、very wary about genetic engineering
C、reluctant to try new plant combinations
D、alarmed about limitless experiments
答案
A
解析
本题为综合推理题。整篇文章举例说明新的生物技术即基因工程对农业的贡献。显然,作者的态度是积极的。
转载请注明原文地址:https://kaotiyun.com/show/b0qC777K
本试题收录于:
英语题库成考专升本分类
0
英语
成考专升本
相关试题推荐
Insteadofresearchingandwritingtheirpapers,somestudents______.Ifteacherswanttofindoutiftheirstudentswrotethe
Schoolshavebecomelessimportantandlong-termhealthcaremoreimportantasAmericabecomesasocietywithfewerchildrenand
Itwashisself-confidencethat______(able)himtobecomeacompetentengineer.
Myhairwants______,buttheresearchprojecthaskeptmebusy.
Therapiddevelopmentofcommunicationstechnologyistransformingthe______inwhichpeoplecommunicateacrosstimeandspace.
Heiswidely______asoneofourbestyoungscientists.
随机试题
A.持续高热、抽搐、呼吸衰竭B.高热、休克、惊厥、呼吸衰竭C.头痛、腰痛、眼眶痛D.眼红、腿痛、淋巴结肿大E.相对缓脉流行性出血热表现为()
题图为对称结构,其正确的半结构计算简图四个图中的哪一个?
对于大气一级评价项目,按大气环境影响评价技术导则规定,其现状监测不得少于二期,其监测季节分别为()。
中国农业发展银行资金来源主要是()。
某公司2012年年初拥有一栋办公大楼原值为30000万元,2012年2月28日将其中部分闲置房间出租,租期2年,出租部分的房产原值为5000万元,租金每年1000万元。当地政府规定计算房产余值减除比例为20%,2012年该公司应缴纳房产税()万元
下列选项中,一定是由银行签发的票据有()。
市场营销组合的策略包括()。
2014年1—6月游戏产业数据报告指出,中国游戏用户数量4亿人,同比增长9.5%。2014年1—6月,中国游戏市场(包括网络游戏市场、移动游戏市场、单机游戏市场等)实际销售收入达到496.2亿元,同比增长46.4%。中国游戏市场实际销售收入构成如下:客户端
Whenonelooksbackthefifteenhundredyearsthatarethelifespanof1,______theEnglishlanguage,heshouldbeabletonoti
Aswehaveenteredthenewcentury,humansocietyisbeginningitsmovefromtheindustrialeconomyintotheknowledge-basedeco
最新回复
(
0
)