首页
登录
职称英语
In recent years a new farming revolution has begun, one that involves the【C1
In recent years a new farming revolution has begun, one that involves the【C1
游客
2023-07-17
71
管理
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. [br] 【C18】
选项
A、issues
B、height
C、difficulties
D、goals
答案
A
解析
转载请注明原文地址:https://tihaiku.com/zcyy/2845106.html
相关试题推荐
[originaltext]M:Hi,Linda!Howhaveyoubeenrecently?W:Iprobablyshouldn’t
[originaltext]M:Hi,Linda!Howhaveyoubeenrecently?W:Iprobablyshouldn’t
[originaltext]M:Hi,Linda!Howhaveyoubeenrecently?W:Iprobablyshouldn’t
Chemistrydidnotemergeasascienceuntilafterthescientificrevolution
Chemistrydidnotemergeasascienceuntilafterthescientificrevolution
Thepointoffactoryfarmingischeapmeat,madepossiblebyconfininglarge
Thepointoffactoryfarmingischeapmeat,madepossiblebyconfininglarge
Thepointoffactoryfarmingischeapmeat,madepossiblebyconfininglarge
Thepointoffactoryfarmingischeapmeat,madepossiblebyconfininglarge
Thepointoffactoryfarmingischeapmeat,madepossiblebyconfininglarge
随机试题
[img]2019m7x/ct_etoeiclm_etoeiclzp_0901_20190606[/img][br][originaltext](A)Th
______thefactthathisinitialexperimentshadfailed,Prof.Whitepersistedin
没有你的帮助,我不会得到这份工作。(butfor)Butforyourhelp,Iwouldn’thaveacquiredthisjob.
早期糖尿病肾病A.组织性蛋白尿 B.微量白蛋白尿 C.大量白蛋白尿 D.直
慢性粒细胞白血病瘀血内阻证的首选方剂是( )。A.少腹逐瘀汤 B.青蒿鳖甲汤
根据《证券发行上市保荐业务管理办法》的规定,下列关于证券公司申请保荐机构资格应当
需要采用岗位评估和薪酬调查确保的是薪酬战略的()。 A.效率目标B.公平目
下列关于使用寿命有限的无形资产摊销的表述中,正确的有()。A.自达到预定用途的
(2015年)某高架点源排放的SO2,NO2源强相等,即QSO2=QNO
含水率大于最佳含水率,特别是超过最佳含水率两个百分点,最易导致的病害是()
最新回复
(
0
)