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
2023-09-11
13
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 earth’s chief food-growing zones.
In the past, concern about a man-made warming of the earth has concentrated on the Arctic (北极) because the Antarctic (南极) is much colder and has much thicker ice sheets. But the weather experts arc 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 inertia (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] Although the fuel consumption is greater in the northern hemisphere, temperatures there seem to be falling. This is ______.
选项
A、mainly because the levels of carbon dioxide are rising
B、possibly because the ice caps in the poles are melting
C、exclusively due to the effect of the inertia of the earth’s climate
D、partly due to variations in the output of solar energy
答案
D
解析
细节题。根据第五段最后两句和第六段第一句和最后一句,太阳自身的多变行为可能是影响气候的自然因素。
转载请注明原文地址:https://tihaiku.com/zcyy/3004827.html
相关试题推荐
WhenIgotowork,______(我喜欢乘公汽而不是自己驾车).Iprefertakingthebusratherthandr
You’dbettervaryyourdiet__________(不要总吃同样的东西).ratherthaneatthesamethi
Sheissogenerous.______(我宁愿她把重活留给别人)I’drathershelefttheheavyendofth
He’dratherreadabookonphysics__________________________(甚于看电影或者在电视上看足球比赛).
Thesebravesoldierswould_________________(宁死不降).ratherdiethansurrender
Theauthorscriticise______(现行的奖励失败的体制)andfocusingoncost,ratherthanvalue
Intheatmosphere,carbondioxideactsratherlikeaone-waymirrortheglas
Intheatmosphere,carbondioxideactsratherlikeaone-waymirrortheglas
Intheatmosphere,carbondioxideactsratherlikeaone-waymirrortheglas
__________________(在乡间有一种祥和宁静的气氛),quitedifferentfromtheatmosphereofabig
随机试题
某信息系统建设项目,由于建设单位组织结构调整,造成项目进度延期,并导致监理合同约
库氏法将肝脏分为八个区,以肝段(S)命名,下列说法错误的是A.尾状叶为S1 B
具有健脾止泻、除湿止带、益肾固精功效的药物是()A.白术 B.五倍子
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
阻塞性黄疸病人的尿液呈A、鲜红色 B、乳白色 C、黄褐色 D、酱油色 E
处于成熟阶段行业中的企业,成功的关键要素是()。A:做好成本控制B:产品价格促
国内某汽车零件生产企业某日自美国进口价值1000万美元的生产设备,约定3个月后支
(2021年第1批真题)根据《历史文化名城名镇名村保护条例》,可以申报历史文化名
发包人在招标工程量清单中给定某工程设备暂估价,下列关于该工程设备价款调整的说法正
关于竣工工程现场成本与竣工工程完全成本的核算主体及核算目的,说法不正确的是()。
最新回复
(
0
)