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
104
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
BritishCuisine:theBestofOldandNewBritishcuisine(烹饪)hascomeofageinrecentyearsaschefs(厨师)combinethebest
BritishCuisine:theBestofOldandNewBritishcuisine(烹饪)hascomeofageinrecentyearsaschefs(厨师)combinethebest
Asksomeonewhattheyhavedonetohelptheenvironmentrecentlyandtheywillalmostcertainlymentionrecycling.Recyclingin
Asksomeonewhattheyhavedonetohelptheenvironmentrecentlyandtheywillalmostcertainlymentionrecycling.Recyclingin
随机试题
A.近曲小管B.髓袢降支细段C.髓袢升支粗段D.远曲小管E.集合管肾小球滤液中的氨基酸被重吸收的部位是()
下列为抗痛风的药物是
可引起儿童牙釉质发育不良和牙齿着色变黄的药物是()。
患者,女,52岁。近来自觉咽中不适,如有物梗阻,吐之不出,咽之不下,精神抑郁,胸胁胀满,舌苔白腻,脉弦滑。中医称之为“梅核气”,治疗时常选用的方剂是()。
依据房产计税余值计税的房产税的税率为__________;依据房产租金收入计税的,税率为__________。()
游客的意见、要求、建议乃至投诉,其他旅游服务部门在接待工作中出现的问题以及他们的建议和要求,一般是通过导游员向旅行社传递直至上报旅游行政管理部门,这体现了导游服务工作纽带作用中的()。
设基带信号频谱如图所示,以下模拟调制后的频谱中,属于单边带调幅(SSB)的是()。
在毕业考试结束后,班长想从老师那里打听成绩。班长说:“老师,这次考试不太难,估计我们班同学的成绩都在70分以上吧。”老师说:“你的前半句话不错,后半句话不对。”根据老师的意思,下列哪项必为事实?()
终止禅让制的是( )。
一副扑克牌除大小王之外有52张,从中取三张,使得三张点数之和为26,且第三张点数不小于前两张点数之和。若A=1点,B=2点,……,J=11点,Q=12点,K=13点,点数相同花色不同为不同取法,那么共有多少种不同取法?
最新回复
(
0
)