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
Is there a population problem? My answer【C1】______the question is "YES", there is a problem. The scale of human activities is no
Is there a population problem? My answer【C1】______the question is "YES", there is a problem. The scale of human activities is no
admin
2010-12-02
38
问题
Is there a population problem? My answer【C1】______the question is "YES", there is a problem. The scale of human activities is now so【C2】______that we are appreciably【C3】______the climate and ecosystems in our country, the U.S. and the world.
The total【C4】______of people on the environment is【C5】______to each of two factors:
A) The number of people, and
B) The【C6】______impact of each person.
If we are to【C7】______the total impact of people on the global environment, we must address the first, or preferably both, of these【C8】______
There are many strong forces that will cause【C9】______growth of the average impact of each person on the global environment. To the extent that people in【C10】______countries【C11】______increase their material standard of living to levels more like ours, material consumption per capita will grow. So we are left with the imperative of【C12】______population growth, and then of studying the question, "Can this【C13】______population be sustained?’
To gain a better appreciation of the seriousness of the problem, let us review some very elementary【C14】______Let us consider a【C15】______that is experiencing steady growth【C16】______such as 5% per year.
First we note that this growing quantity will double【C17】______in a fixed time. This doubling time is found by【C18】______70 by the percent growth per year. For example, the doubling time for a steady growth rate of 5% per year is 70/5=14 years.
Second, we note that a few doublings can give enormous numbers. It is convenient to remem-ber【C19】______ten doublings causes the growing quantity to increase in size by a factor of approximately 1000; twenty【C20】______will cause an increase by a factor of 1,000,000, etc.
【C20】
选项
A、double
B、doublings
C、doubled
D、doubles
答案
B
解析
语义衔接题。本句的宾语从句由两个并列的分句构成,二者的句子结构基本相同,主谓宾三个成分之间分别存在对应关系,所以所填词应是doublings(加倍成双)。
转载请注明原文地址:https://kaotiyun.com/show/yf1K777K
0
专业英语四级
相关试题推荐
HowmanychildrendieeverydayfrommalnutritionandpreventablediseasesaccordingtotheUNestimation?
Hekeptaskingquestions,butnotaword______.
Thenamesofthosequalifiedapplicants______bytheAcademicSupportCommittee.
Hecan’tanswerthequestion______hegotthemoney.
Theproblemis______wecanmastermodernscienceandtechnologyinashorttime.
Ourmanager______araiseinsalaryforages,butnothinghashappenedyet.
2003FeatureEveningPerformances!Here’swhat’sinstoreforFridayandSaturdayEvenings!Thisissubjecttochange!March7th
Sociologistsuse"power"torefertothecapacityofpeopletocontrolorinfluencetheactionsofothers.Sociologistsstudypo
Sociologistsuse"power"torefertothecapacityofpeopletocontrolorinfluencetheactionsofothers.Sociologistsstudypo
随机试题
在数据库中,数据模型包括数据结构、数据操作和()。
女,42岁,痛经3年余,进行性加重,经期延长,经量增多,避孕药(炔雌醇一去氧孕烯)周期治疗,可缓解痛经,G3P1A2L1,曾放置IUD10年,已取出2年。妇科检查:宫颈肥大、二度颗粒型糜烂,子宫如孕3个月大小,均匀性增大,质硬,表面光滑,后壁略突出,活动好
A.嵌合抗体B.小分子抗体C.双特异性抗体D.单克隆抗体E.多克隆抗体通过基因工程技术,将A动物的免疫球蛋白恒定区与B动物的免疫球蛋白可变区基因连接,并导入受体细胞表达所得到的抗体称为()
保险公司次级债务的偿还只有在确保偿还次级债本息后偿付能力充足率()的前提下,募集人才能偿付本息。
剩余股利政策具有以下()优点。
可分为前台交易、中台风险管理和后台结算/清算三个环节的是()
下列单位中,( )可以成为保证人。
1995年通过的《中华人民共和国教育法》规定:“教育必须为社会主义现代化建设服务,必须与__________相结合,培养德、智、体等方面全面发展的社会主义事业的建设者和接班人。”
请你从选项四个图中选出唯一的一项填入问号处。保持题干图形规律性。
近年来大学生到农村当村官,有村民反映说大学生经验不足,还有的大学生也说自己觉得不适应,不好开展工作,说说你的看法。
最新回复
(
0
)