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
考研
In recent years a new farming revolution has begun, one that involves the【1】of life at a fundamental level-the gene. The study o
In recent years a new farming revolution has begun, one that involves the【1】of life at a fundamental level-the gene. The study o
admin
2011-02-25
23
问题
In recent years a new farming revolution has begun, one that involves the【1】of life at a fundamental level-the gene. The study of genetics has【2】a new industry called biotechnology. As the name suggests, it【3】biology and modern technology through such techniques as genetic engineering. Some of the new biotech companies specialize in agriculture and are working feverishly to【4】seeds that give a high yield, that【5】disease, drought and frost, and that reduce the need for【6】chemicals. If such goals could be achieved, it would be most【7】. But some have raised concerns about genetically engineered crops.
In nature, genetic diversity is created within certain【8】. A rose can be crossed with a different kind of rose, but a rose will never cross with a potato. Genetic engineering【9】usually involves taking genes from one species and inserting them into another【10】to transfer a desired characteristic. This could mean, for example, selecting a gene which leads to the production of a chemical with anti-freeze【11】from an arctic fish, and inserting it into a potato or strawberry to make it frost-resistant.【12】, then, biotechnology allows humans to【13】the genetic walls that separate species.Like the green revolution,【14】some call the gene revolution contributes to the problem of genetic uniformity-some say even more【15】geneticists can employ techniques such as cloning and【16】culture, processes that produce perfectly【17】copies. Concerns about the erosion of biodiversity, therefore, remain. Genetically altered plants, however, raise new【18】, such as the effect they may have on us and environment. ".We are flying blindly into a new【19】of agricultural biotechnology with high hopes, few constraints and little idea of the potential【20】," said science writer Jemery Rifkin.
选项
A、hostile
B、hydraulic
C、hazardous
D、harmless
答案
A
解析
考查词义辨析。hostile意为“不利于健康的,有害的”;hydraulic意为“水压的”; hazardous意为“危险的,冒险的”;harmless意为“无害的,无恶意的”。所填词的宾语是“chemicals”,故选项A正确。
转载请注明原文地址:https://jikaoti.com/ti/i77RFFFM
0
考研英语一
相关试题推荐
Maintainingclassroomdisciplineisagrowingproblemformanyschools.(46)Somechildrenseemincapableoffollowingtherules,
ThetextismainlyaboutTheCeltshelpedFrancetoresist
ThequestionwhichisdiscussedinthepassageisTheauthormentionsthe"socialmovement"(Lastparagraph)generatedbyChica
Recentlegalresearchindicatedthatincorrectidentificationisamajorfactorinmanymiscarriagesofjustice.Italsosuggest
Recentlegalresearchindicatedthatincorrectidentificationisamajorfactorinmanymiscarriagesofjustice.Italsosuggest
Thebiggestdangerfacingtheglobalairlineindustryisnottheeffectsofterrorism,war,SARSandeconomicdownturn.Itisth
Thediscoveryoftheshipisimportanttostudentsofearlyshipsandtheirroutesbecause______.Theapproximatedateofthe
Atsomepointduringtheireducation,biologystudentsaretoldaboutaconversationinapubthattookplaceover50yearsago.
Scholarsandstudentshavealwaysbeengreattravelers.Theofficialcasefor"academicmobility"isnowoftenstatedinimpress
随机试题
“我们明天早晨八点准时出发”这种语调是属于直调。()
我国联行往来实行的三级管理体制包括()
“中焦受气取汁,变化而赤,是谓血”说明
Excel中数据的排序方法有()。
申请除期货公司董事长、监事会主席、独立董事以外的董事、监事和财务负责人的任职资格,应当由拟任职期货公司向()提出申请。
德国和瑞士的专家经过研究得出一个有趣的结论:餐具颜色能直接影响食欲,红色餐具可降低人们40%的食量。在人们的传统观念中,红色是极具进攻性的色彩,用红色餐具盛放食物往往会让人难以下咽,因为在潜意识中人们会给自己发出不能吃红色餐具中食物的心理暗示,从而令食欲下
在一个关系模型中,任意两个元组的值()。
在软件开发中,需求分析阶段可以使用的工具是
【S1】【S7】
(1)TheCentersforDiseaseControlandPreventionhaswarnedpregnantwomenagainsttraveltoseveralcountriesintheCaribbea
最新回复
(
0
)