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 【21】______ of life at a fundamental level—the gene.
In recent years a new farming revolution has begun, one that involves the 【21】______ of life at a fundamental level—the gene.
admin
2010-07-06
39
问题
In recent years a new farming revolution has begun, one that involves the 【21】______ of life at a fundamental level—the gene. The study of genetics has 【22】______ a new industry called biotechnology. As the name suggest, it 【23】______ biology and modem technology through such techniques as genetic engineering. Some of the new biotech companies specialize in agriculture and are working feverishly to 【24】______ seeds that give a high yield, that 【25】______ diseases, drought and frost, and that reduce the need for 【26】______ chemicals. If such goals could be achieved, it would be most 【27】______ . But some have raised concerns about genetically engineered crops.
In nature, genetic diversity is created within certain 【28】______ . A rose can be crossed with a different kind of rose, but a rose will never cross with a potato. Genetic engineering, 【29】______ usually involves taking genes from one species and inserting them into another 【30】______ to transfer a desired Characteristic. This could mean, for example, selecting a gene which leads to the production of a chemical with antifreeze 【31】______ from an artic fish, and inserting it into a potato or strawberry to make it frost-resistant. 【32】______ , then, biotechnology allows humans to 【33】______ the genetic walls that separate species.
Like the green revolution, 【34】______ some call the gene revolution contributes to the problem of genetic uniformity—some say even more so 【35】______ geneticists can employ techniques such as cloning and 【36】______ culture(培养), processes that produce perfectly 【37】______ copies. Concerns about the erosion of biodiversity, therefore, remain. Genetically altered plants, however, raise new 【38】______ , such as the effects that they may have on us and the environment. "We are flying blindly into a 【39】______ of agricultural biotechnology with high hopes, few constraints, and little idea of the potential 【40】______ ," said science writer Jeremy Rifkin.
【22】
选项
A、got along with
B、given rise to
C、come up with
D、lived up to
答案
B
解析
根据句子的逻辑关系:“这场基因项目的研究已经引起了……”,即B项 give rise to“引起……,产生”符合句意。come up with “找出或提出答案、办法等”。live up to 符合某事物的原则。
转载请注明原文地址:https://kaotiyun.com/show/z0Dd777K
本试题收录于:
公共英语四级笔试题库公共英语(PETS)分类
0
公共英语四级笔试
公共英语(PETS)
相关试题推荐
WhatishappeninginAustralia’sagriculturalindustry?WhatproblemdoesMr.Kerinpointout?
DoesthepublisherofDouglasStarr’sexcellentBlood—AnEpicHistoryofMedicineandCommerceactuallyexpecttosellmanycopi
TherecentsocialandeconomicchangesintheU.S.havegreatimpactonalltheAmericanhousingsystem.Livingundergroundca
Therehasbeenadiscussionrecentlyontheissueofchallengeinanewspaper.Somepeoplethinkchallengeisakindofimpetus,
Whatisthemostfundamentaldifferencebetweenplantsandanimals?
Jewish从给出的信息(GermanyofJewishnationality)可以判断答案是Jewish,此外,文中说1938年他到了美国,所以可以猜测他不是美国人,这个信息可以辅助我们确定正确答案。注意民族、国籍等需要用形容词形式。
NewfiguresfromFrance,GermanyandItaly--thethreebiggesteconomiesinthe12-countryEurozone-suggestthecontinent’sec
Jewish独白第一句话即用ofJewishnationality(犹太民族)说明了基辛格的民族。注意nationality在此不是“国籍”,因为在Germany下面的Birthplace(出生地)一栏中出现了。另外,考生应注意表格中的信息顺序并不是材
Weholdsthesetruthstobeselfevidentthat______.
WhatisCathyfedupwith?______onpackingcases
随机试题
细胞膜的两个表面(外表面、内表面)有不同的蛋白质和不同的酶。()
先天性后外侧疝见于
患者口内前牙经过长期磨耗后,改变最明显的是
A.抗-HBs阳性B.HBeAg阳性C.抗-HBe阳性D.HBsAg阳性E.抗-HBcIgM阳性表示病毒大量复制、传染性强的是
公路丁程用沥青主要是道路石油沥青、乳化沥青、改性沥青和改性乳化沥青。下列属于改性沥青的是()。
在太阳能供电系统中,()抗辐射能力很强,目前主要运用于宇航及通信卫星等空间领域。
公安机关作出2000元以上罚款的治安管理处罚决定前,应当告知违反治安管理行为人有权要求举行听证。()
计划生育属于政府的()
功能折扣
以下有关光纤通信的说法中错误的是()。
最新回复
(
0
)