首页
登录
职称英语
In the atmosphere, carbon dioxide acts rather like a one-way mirror—the gla
In the atmosphere, carbon dioxide acts rather like a one-way mirror—the gla
游客
2024-05-30
41
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 the 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 the 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 or 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 inertia 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, which of the following statement is true?
选项
A、the best way to overcome the cooling effect would be to burn more fuels
B、ice would soon cover the northern hemisphere
C、the increased levels of carbon dioxide in the atmosphere could warm up the earth even more quickly
D、the greenhouse effect could work to the advantage of the earth
答案
D
解析
细节题。本题涉及对文章最后一段最后一句话的理解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.(如果有关太阳光能延缓新冰河时代到来的推测是正确的,那么二氧化碳的温室效应将发挥有效的作用来平衡太阳日益减少的光热。)选项D与此意相符,其他选项概括不全面。因此,答案是D。
转载请注明原文地址:https://tihaiku.com/zcyy/3612158.html
相关试题推荐
Doyouseetheglassashalf-fullratherthanhalfempty?Doyoukeepyoure
Doyouseetheglassashalf-fullratherthanhalfempty?Doyoukeepyoure
Doyouseetheglassashalf-fullratherthanhalfempty?Doyoukeepyoure
Doyouseetheglassashalf-fullratherthanhalfempty?Doyoukeepyoure
Infact,PeterwouldratherhaveleftforSanFrancisco______(而不愿呆在纽约).thans
Intheatmosphere,carbondioxideactsratherlikeaonewaymirror—theglas
Intheatmosphere,carbondioxideactsratherlikeaone-waymirror—theglas
Intheatmosphere,carbondioxideactsratherlikeaone-waymirror—theglas
WhydoestileFoundationconcentrateitssupportonbasicratherthanapplie
WhydoestileFoundationconcentrateitssupportonbasicratherthanapplie
随机试题
Weallscreamforwater【C1】______thirsty.Butdoyouknowinveryhot,dryw
Thispartistotestyourabilitytodopracticalwriting.Youarerequired
Someteenagersharborageneralizedresentmentagainstsociety,which______the
Peoplecannowavoidhavingtosortthroughalbumsfromseveraldifferentfr
聚氯乙烯对蛋白质的吸附性能与聚苯乙烯相比( )。A.略低 B.无法比较 C
长期以来,有很多项目经理只关注项目是否按期完成和质量情况,缺少对成本的责任控制,
下列()不属于卫生保健资源在卫生事业内部进行分配的要求A.应坚持治疗与预防相
体育课分组教学的形式,一般有分组不轮换和()。A.先合后分 B.两组一轮换
非公开募集基金管理人实行登记制度,需向()登记。A.中国证监会 B.中国人民
某混凝土试块强度值不满足规范要求,但经法定检测单位对混凝土实体强度经过法定检测后
最新回复
(
0
)