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
2016-07-10
70
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/qOXd777K
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
WhichofthefollowingstatementsaboutthetelephoneofthefutureisNOTtrue?
Iwasnotmorethanthirteenyearsoldatthetime,(31),butIrememberthemomentasifit(32)yesterday.Ihadjusttakenmy
AccordingtoParagraph1______.Thechangeinthenumberoftextmessagescanbeattributedtothefollowingfactorsexcept____
Whyarethecasesofattacksreportedinthefirstparagraph?Accordingtothepassage,’theyoungpeopletendtoattacktheho
Afteritsmisadventuresin1093,whenAmericanmarinesweredrivenoutofSomaliabyskinnygunmen,Americahasusedalongspoo
______hadappliedJohnLocke’stheoryinhisstudiesofphilosophy?______triedtodosomethingintheNewWorldbutfailedin
AnotherearlyNativeAmericantribein(31)isnowthesouthwesternpartoftheUnitedStateswastheAnasazi.ByA.D.800theA
AnotherearlyNativeAmericantribein(31)isnowthesouthwesternpartoftheUnitedStateswastheAnasazi.ByA.D.800theA
AnotherearlyNativeAmericantribein(31)isnowthesouthwesternpartoftheUnitedStateswastheAnasazi.ByA.D.800theA
随机试题
关于口外上颌前方牵引矫治器说法正确的是
兴奋通过神经一肌肉接头时,参与的神经递质是
在五输穴中,荥穴主要治疗()
2012年5月,某镇农民甲、乙、丙三人因平时关系较好,他们商量每人出资3万元创办一普通合伙企业,企业名称为振东羽绒加工厂。为了解决资金短缺困难,甲、乙、丙向镇信用社贷款30万元。5月底,甲、乙、丙三人签订了合伙创办振东羽绒加工厂的协议,并向工商行政管理机关
分配电箱应装设在用电设备或负荷相对集中的区域,分配电箱与开关箱的距离不得超过50m()
现行注册建造师执业的专业中,只设一级建造师执业资格的专业是( )。
(),西方主要工业化国家首脑在美国的布雷顿森林召开会议,创建了国际货币基金组织。
七国之乱
不定积分=__________.
MPEG-1的视频图像序列由帧内图像、预测图像和(47)构成,其中(48)的数据量最少。MPEG-1视频编码的运动补偿是基于(49)的宏块进行的,图像的DCT编码是在(50)颜色空间进行的。
最新回复
(
0
)