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 terms of the evolution of life on Earth, human beings have just arrived. 【C1】______ their short time on Earth, however, peopl
In terms of the evolution of life on Earth, human beings have just arrived. 【C1】______ their short time on Earth, however, peopl
admin
2010-06-26
44
问题
In terms of the evolution of life on Earth, human beings have just arrived. 【C1】______ their short time on Earth, however, people have brought about enormous changes to the surface of the planet—changes far out of【C2】______to the interval of time they have【C3】______ it.
With the【C4】______ of intelligence and manual skill, people have found ways to use plant and animal resources, mineral ores, fuels, and so on. As the number of people on Earth increases, it becomes increasingly difficult for the population to survive【C5】______ the resources of the land. The amount of land is limited. Although agricultural production can be increased by use of【C6】______such as tractors and the addition of fertilizer, the land【C7】______can produce only so much food and no more. As the human population grows, people【C8】______ more.
People are only a very small 【C9】______of all the living things on the planet. Yet their numbers create a 【C10】______ on resources that can’t be 【C11】______. For example, the amount of water on Earth is limited; this water is 【C12】______ through natural processes. However, the natural processes for 【C13】______ water can clean only a certain amount of water.【C14】______, a limited amount of petroleum can be found under the Earth’s surface.
All natural systems tend toward 【C15】______ among opposing factors or forces. Human activities can cause or 【C16】______ permanent changes in natural systems. The【C17】______ smoke from thousands of factories has caused enormous air pollution. Cleaning this smoke has【C18】______ the protective ability of natural processes. The forests cannot clean the air fast enough. The twentieth century began with powerful countries competing to take【C19】______ of the Earth. As an outcome of their hunger, the Earth was abused. Now that people are no longer【C20】______ of the causes of the sickness of our planet, they seek ways to rescue the Earth.
【C7】
选项
A、ultimately
B、previously
C、currently
D、thereby
答案
A
解析
副词辨析题。句意为:虽然使用拖拉机等机械以及使用化肥可以提高农业产量,但是土地最终所能产出的粮食只有那么多,不会再增加。[A]ultimately“最终”;[B]previously“先前”;[C]currently“当前”;[D]thereby“从而,因此”。所以[A]是答案。
转载请注明原文地址:https://kaotiyun.com/show/X21K777K
0
专业英语四级
相关试题推荐
Thousandsofpeopleturnoutintostreetsto______againsttheprojectputforwardbythelocalauthorities.
Humanbeingshaveusedtoolsforalongtime,______theywouldnothavebeenabletodeveloptheirintelligentsofast.
Theevolutionofsexratiohasproduced,inmostplantsandanimalswithseparatesexes,approximatelyequalnumbersofmalesan
Withthefilmsprevalentacrossthewholeworld,however,mostcriticalplotpointsinHarryPotterandtheSorcerer’sStonecam
Withthefilmsprevalentacrossthewholeworld,however,mostcriticalplotpointsinHarryPotterandtheSorcerer’sStonecam
Moreandmoreoftheworld’ssupplyofseafoodiscomingfromfarms.Although80%oftheworld’sseafoodcomesfrommarineha
Seafoodcouldbegoingoffalotofmenusastheworldwarms.Morethanhalfofagroupoffish【C1】______forthemarinefoodwe
Seafoodcouldbegoingoffalotofmenusastheworldwarms.Morethanhalfofagroupoffish【C1】______forthemarinefoodwe
Seafoodcouldbegoingoffalotofmenusastheworldwarms.Morethanhalfofagroupoffish【C1】______forthemarinefoodwe
随机试题
舰船类部队装备型号多,使得不同岗位的船员都有不同的学习训练需求,客观上加大了军事院校集中组织培训的难度。与此同时,船用装备结构复杂、构件精密,操作维修的技术含量高,人才培养周期较长。以机电岗位为例,从刚接触设备到能够单独操作设备、处理机械故障,一般要3~5
A.冠心病B.风心病C.房间隔缺损D.心肌病E.高血压病属于先天性心脏病的是
中医学认识疾病和治疗疾病的基本原则是
享受减税、免税待遇的纳税人,在减税、免税期间可以不办理纳税申报。()
下列情况中,属于股份支付的是()。
在科学方法论和教育理论指导下围绕一定的教育问题,运用观察、问卷、访谈、测量的方式,有计划、有目的地搜集有关事实材料,从而做出科学分析并提出具体工作建议的一系列教育实践活动,这是()。
填入下面文字横线处的词语,最恰当的是()。跟纸质出版物相比,网络文章发表之前无须经过身份验证、资格审查和学术评议等程序,这样就难免造成____________、____________的局面。
18÷1.5+0.15×0.4的值是:
设X,Y为两个随机变量,E(X)-E(Y)=1,D(X)=9,D(Y)=1,且ρXY=-2/3,则E(X-2Y+3)2=________.
Readinginvolveslookingatgraphicsymbolsandformulatingmentallythesoundsandideastheyrepresent.Conceptsofreadingha
最新回复
(
0
)