首页
登录
职称英语
In the atmosphere, carbon dioxide acts rather like a one-way mirror—the glas
In the atmosphere, carbon dioxide acts rather like a one-way mirror—the glas
游客
2024-06-05
3
管理
问题
In the atmosphere, carbon dioxide acts rather like a one-way mirror—the glass in the roof of a greenhouse which allows the sun’s rays to enter but prevents the heat from escaping. According to a weather expert’s prediction, the atmosphere will be 3℃ warmer in the year 2050 than it is today, if man continues to’ burn fuels at the present rate. If this warming up took place, the ice caps in the poles would begin to melt, thus raising sea level several meters and severely flooding coastal cities. Also, the increase in atmospheric temperature would lead to great changes in the climate of the northern hemisphere, possibly resulting in an alteration of earth’s chief food-growing zones.
In the past, concern about a man made warming of the earth has concentrated on the Arctic because the Antarctic is much colder and has a much thicker ice sheet. But the weather experts are now paying more attention to West Antarctic, which may be affected by only a few degrees of warming, in other words, by a warming on the scale that will possibly take place in the next fifty years from the burning of fuels.
Satellite pictures show that large areas of Antarctic ice are already disappearing. The evidence available suggests that a warming has taken place. This fits the theory that carbon dioxide warms the earth.
However, most of the fuel is burnt in the northern hemisphere, where temperatures seem to be falling. Scientists conclude, therefore, that up to now natural influences on the weather have exceeded those caused by man. The question is, which natural cause has most effect on the weather?
One possibility is the variable behavior of the sun. Astronomers at one research station have studied the hot spots and "cold" spots (that is, the relatively less hot spots) on the sun. As the sun rotates every 27.5 days, it presents hotter or "colder" faces to the earth, and different aspects to different parts of the earth. This seems to have a considerable effect on the distribution of the earth’s atmospheric pressure, and consequently on wind circulation. The sun is also variable over a long term: its heat output goes up and down in cycles, the latest trend being downward.
Scientists are now finding mutual relations between models of solar-weather interactions and the actual climate over many thousands of years, including the last Ice Age. The problem is that the models are predicting that the world should be entering a new Ice Age and it is not. One way of solving this theoretical difficulty is to assume a delay of thousands of years while the solar effects overcome the inenia (惯性) of the earth’s climate. If this is right, the warming effect of carbon dioxide might thus be serving as a useful counter-balance to the sun’s diminishing heat. [br] If the assumption about the delay of a new Ice Age is correct, _____.
选项
A、the increased levels of carbon dioxide could warm up the earth more quickly
B、ice would soon cover the southern hemisphere
C、the best way to overcome the cooling effect would be to burn more fuels
D、the greenhouse effect could work to the advantage of the earth
答案
D
解析
从文章的最后一句话可以得知,二氧化碳可以作为counter-balance to the sun’s diminishing heat,所以D是正确答案。
转载请注明原文地址:https://tihaiku.com/zcyy/3620817.html
相关试题推荐
Intheatmosphere,carbondioxideactsratherlikeaone-waymirror—theglas
Intheatmosphere,carbondioxideactsratherlikeaone-waymirror—theglas
Intheatmosphere,carbondioxideactsratherlikeaone-waymirror—theglas
WhydoestileFoundationconcentrateitssupportonbasicratherthanapplie
WhydoestileFoundationconcentrateitssupportonbasicratherthanapplie
WhydoestileFoundationconcentrateitssupportonbasicratherthanapplie
Tomisahard-workingboy.(他宁愿呆在图书馆学习而不去跳舞)______onweekends.Hewouldrather
Whenhetalkedwithhisgirlfriend,______________(他对婚姻的看法非常固执).hewasrather
Someyoungpeoplewouldrathertryhardthemselveswhentheyareintrouble____
Intheatmosphere,carbondioxideactsratherlikeaone-waymirror—thegla
随机试题
Howdidtheearlypeopledotheircounting?Atfirst,theydidalltheircou
PresidentClintonlatertodayjoins【B1】______PresidentsFord,CarterandBu
关于房屋需要设置防震缝的说法,错误的是()。A.房屋立面高差在6m以上 B
容易引起肾损害的是A.风湿热B.儿童类风湿C.过敏性紫癜D.先天性胸腺发育不全E
日本血吸虫病是一种人畜共患病。
下列不属于尿道损伤的病理类型A.尿道挫伤 B.尿道裂伤 C.尿道断裂 D.
J68、自耦变压器的效益系数应()。(A)大于1(B)等于1
治疗痿证时的取穴原则为A.以手阳明经穴为主 B.以足阳明经穴为主 C.以夹脊
财务杠杆加大对公司的可持续增长率影响不显著的原因在于()。A.利润的增长并没有
【背景资料】 某安装公司总包氮氢压缩分厂的全部机电安装工程,其中氮氢压缩机为
最新回复
(
0
)