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
2024-05-04
42
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] It can be concluded that a concentration of carbon dioxide in the atmosphere would
选项
A、prevent the sun’s rays from reaching the earth’s surface
B、mean a warming up in the Arctic
C、account for great changes in the climate in the northern hemisphere
D、raise the temperature of the earth’s surface
答案
D
解析
推理判断题。文章第一段讲到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.(二氧化碳在大气中就像温室的玻璃屋顶一样吸收太阳的光线并阻挡光热的流失。)文章第二段最后一句话又再次提到二氧化碳能使地球变暖的理论。A选项是说二氧化碳能阻挡太阳光到达地球表面.B选项是说二氧化碳能够使北极的温度升高,C选项是说二氧化碳在北半球气候变化中起了很大的作用.这三个选项都不是对文章的全面表述。因此,答案是D。
转载请注明原文地址:https://tihaiku.com/zcyy/3583833.html
相关试题推荐
Intheatmosphere,carbondioxideactsratherlikeaone-waymirror—theglas
We’vebecomearathergerm-phobic(恐惧症的)society,whatwithourantibacterial
We’vebecomearathergerm-phobic(恐惧症的)society,whatwithourantibacterial
We’vebecomearathergerm-phobic(恐惧症的)society,whatwithourantibacterial
Tomissomeanthat______(他宁愿上班迟到也不坐出租车).hewouldratherbelaternrworkthant
Theterm"corporatetransparency"hasbecomeratherfashionable.Thebelief
Theterm"corporatetransparency"hasbecomeratherfashionable.Thebelief
Theterm"corporatetransparency"hasbecomeratherfashionable.Thebelief
Rainforestsmaystoremuchlesscarbonthanwethought.Itcouldbetimeto
Rainforestsmaystoremuchlesscarbonthanwethought.Itcouldbetimeto
随机试题
[originaltext]Peoplearenoworderingandpurchasingvirtuallyanythingoverth
ThoughtsofsuicidehauntedAnitaRutnamlongbeforeshearrivedatSyracuse
WhyGotoCollegeatAll?Iscollegeworthit?Recentlysomepowerfular
Therelationshipbetweenwordsandthingsintheworldisestablishedbymeanso
关于团体心理辅导,表述不正确的是()A.团体心理辅导中,……可针对学校不同的群
近年来,由于互联网的发展,网络监督越来越直接、有力,政府机关及其工作人员的活动越
A美纽斯《大教学论》理论论证采用的主要方法是A.自然类比 B.哲学思辨 C.
甲、乙、丙三国生产卷钢的企业以低于正常价值的价格向中国出口其产品,代表中国同类产
一般资料:男性.l7岁,未婚,中专学生。 求助者自述:我最近一个多月心情很烦,
某企业大批量生产一种产品,该企业为了安排下年度的年度、季度生产任务,现在进行生产
最新回复
(
0
)