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
What can be said about the report by the National Academy of Sciences?
What can be said about the report by the National Academy of Sciences?
admin
2014-06-20
56
问题
What can be said about the report by the National Academy of Sciences?
W: Mr. Welch, do you think there is any doubt now that global warming exists?
M: Let me put it this way. A few determined skeptics don’t accept it, but the over-whelming majority of scientists do. The report the National Academy of Sciences issued was very balanced. They noticed some uncertainties , for example, when and where impacts might be felt and to what degree. But the conclusion was that the earth is warming. This change is induced by human activity and it will get worse.
W: Do a few degrees of warming really matter?
M: The earth is warmed by 1 degree Fahrenheit in the last 100 years, more in some places, like the Arctic, where there has been an increase of 4 to 5 degrees since the 1950s. Polar bears are having a terrible time there and may be extinct by the end of this century. Already, we are seeing changes in Alaska, where roads are buckling in places and some major pipelines no longer fit together. Cold water fish that used to be found off the Alaskan Coast are no longer there.
W: Can a new energy policy help?
M: Energy policy is climate policy since fossil fuels are the main sources of green-house gases, so the question becomes: Where do we get our energy? In the United States, 51% of electricity comes from coal, 20% nuclear, 16.5% natural gas, 7% hydroelectric, 3% oil and the rest, renewables, geothermal, wind, and solar.
W: How much power can we realistically expect to derive from renewable sources?
M: 10% by 2020 is realistic or with a considered effort, 30% by 2050. Without major breakthroughs, it’s hard to get beyond a third, because most renewables are intermittent. You need better ways of storing the energy.
选项
A、Lack of advanced storing technology.
B、A need for joint efforts of scientists.
C、A shortage of practical support from the public.
D、An unreliable market demand.
答案
A
解析
转载请注明原文地址:https://kaotiyun.com/show/ruXd777K
本试题收录于:
公共英语五级笔试题库公共英语(PETS)分类
0
公共英语五级笔试
公共英语(PETS)
相关试题推荐
Whatisyourresponsibilitywhenyou,asaschoolprincipal,gettheteacher’sreport?
Whatisyourresponsibilitywhenyou,asaschoolprincipal,gettheteacher’sreport?
Whatisyourresponsibilitywhenyou,asaschoolprincipal,gettheteacher’sreport?
Whatisyourresponsibilitywhenyou,asaschoolprincipal,gettheteacher’sreport?
Whatisyourresponsibilitywhenyou,asaschoolprincipal,gettheteacher’sreport?
Whatisyourresponsibilitywhenyou,asaschoolprincipal,gettheteacher’sreport?
WhatdidtheteamwithNOAAandSeaGrantaimtodoattheNationalPressClubin2002?Peopleperceivesharksmuchmoredanger
WhatdidtheteamwithNOAAandSeaGrantaimtodoattheNationalPressClubin2002?Scientistsaregreatlyastonishedby___
随机试题
下列项目中,属于会计核算专门方法的有()
下列属于医患关系的非技术方面的是()。
转录真核生物蛋白质编码基因的是
在横断层面上,子宫底与子宫体的分界标志是
资产负债表内表现企业变现能力的资料有()。
前期物业服务合同由()签订。
数学课上,马老师有意让学习成绩较差的小军回答一个简单的问题,并鼓励了他。这主要体现的教学原则是()。
某公司市场部的人数比事业部的人数多,得知行政部比财务部的人数多后,可知市场部的人数也比财务部的人数多。以下各项假设均能使上述推断成立,除了()。
设有s(学号,姓名,性别)和sc(学号,课程号,成绩)两个表,下面SQL的SELECT语句检索选修的每门课程的成绩都高于或等于85分的学生的学号、姓名和性别。SELECT学号,姓名,性别FROMsWHERE______(SELECT*FROMSC
Largeanimalsthatinhabitthedeserthaveevolvedanumberofadaptationsforreducingtheeffectsofextremeheat.【C1】______ad
最新回复
(
0
)