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
2021-03-28
72
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/mpWd777K
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
AnawkwardlookingcharactersuchasCyranodeGergeracmightsniffatthesuggestion,butrecentscientificresearchshowsbeau
Computermicrochipscouldbecomesmaller,fasterandcheaper,thankstoscientistsintheUnitedStateswhohavedevelopedaspe
Doyouhaveapersonalcomputer?Doyouthinkitiswisetobuyapersonalcomputer?Writeanessayonthistopic.Youshouldus
Mirrorimagesisoftendifferentfromthe"feltimages".
Mirrorimagesisoftendifferentfromthe"feltimages".
What’stheobjectiveofgenetictesting?Someresultsofgenetictestsare______.
Whatmakeswomenblindtothedeceptivenatureofhighheels?Theauthor’schiefargumentagainsthighheelsisthat______.
ThepastfewdecadesinBirminghamhaveprovedthatslumclearance______.Accordingtotheauthor,anumberofBirminghamCity
ThehistoryofresponsestotheworkoftheartistSandroBotticelli(1444-1510)suggeststhatwidespreadappreciationbycritic
Amongtheraftofbooks,articles,jokes,romanticcomedies,self-helpguidesandotherwritingsdiscussingmarriage,somefamil
随机试题
设f(x)在[a,b]上连续,x0是(a,b)内任一定点,则=________。
A.胃窦和十二指肠B.十二指肠和空肠C.食管D.小肠下段促胃液素的主要分泌部位是
男性,40岁,发现心脏杂音2年,患者出现下列哪项改变对明确风湿性心脏病的诊断最有价值
噻嗪类利尿药长期服用应防止氨苯蝶啶长期服用需防止
()用于衡量和防御银行实际承担的损失超过预计损失的那部分损失,是防止银行倒闭的最后防线。
衡量一台计算机优劣的主要技术指标通常是指()。
Women’sfertilityisdeterminedinlargepartatbirth.Theyarebornwiththeirtotalnumberofreproductivecells,whichnorma
将单位内部的局域网接入Internet(因特网)所需使用的接入设备是______。
有以下程序 #include<stdio.h> main() { FILE*fp;int i,k=0,n=0; fp=fopen("d1.dat","w"); for(i=1;1<4;i++) fprintf(fp,"%d",i); fclose(fp);
有两个关系R和S如下图所示:由关系R通过运算得到关系S,则所使用的运算为
最新回复
(
0
)