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
56
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
Toomuch______ofhim,MikeTwillersimplywenttoAustraliainthehopeofescapingthepressurefromhisparents.
In58millionhomes,theVCRhasbecomenearlyasmuchasthefamilycar.ButdespitetheVCR’sadvantages,videobuffscomplain
Forthosewhohavehearingproblemstelephonewithvolumecontrolsprovidethebest
3.______wehaveachievedisattributedtotheguidanceofourparents.
Allflights______becauseofthesnowstorm,manypassengerscoulddonothingbuttakethetrain.
Thequestionis______itisworthvisiting.
Howcloseparentsaretotheirchildren______astronginfluenceonthecharacterofthechildren.
Theuseofnuclearpoweristhesubjectofwidespread______.
2003FeatureEveningPerformances!Here’swhat’sinstoreforFridayandSaturdayEvenings!Thisissubjecttochange!March7th
I’minParis,andastrangelyquietParisitis.Nothingisgoingnowhere.Ifthey’renotonstrikehere,they’restuckinatra
随机试题
有关改善病情药物,下列哪项描述不准确
《中华人民共和国动物防疫法》规定,制定并组织实施动物疫病防治规划的是
对氧化磷酸化有调节作用的激素是
《汽车消费贷款管理办法(试点办法)》于2006年颁布。()
某上市公司2003年末发行在外股数为100万股,2004年6月1日发行20万股,2004年8月1日回购12万股,那么加权平均股数为106万股。()
下列选项中,符合环境保护相关法律规定的是()。
______thatcalledthismorning?
交易成本(transactioncosts)又称交易费用,是由诺贝尔经济学奖得主、美国经济学家罗纳德.科斯提出的。他在《企业的性质》一文中认为交易成本是“通过价格机制组织生产的,最明显的成本,就是所有发现相对价格的成本”、“市场上发生的每一笔交易的谈判和
当计算机病毒发作时,主要造成的破坏是()。
【H1】【H7】
最新回复
(
0
)