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
These days, many large city buildings are equipped with their own air-conditioning systems. These systems help keep the building
These days, many large city buildings are equipped with their own air-conditioning systems. These systems help keep the building
admin
2015-01-31
36
问题
These days, many large city buildings are equipped with their own air-conditioning systems. These systems help keep the buildings cool, but they can also damage the environment. Since they use a lot of electricity, for instance, they contribute indirectly to global warming. In addition, the water that flows through the systems is often cooled using chemicals called chlorofluorocarbons, or CFCs, that are believed to damage the Earth’ s ozone layer. Recently, though, a system has been built in the city of Toronto, Canada, that cools buildings with little damage to the environment.
In the traditional air-conditioning systems found in most large buildings, water is pumped through the building in a continuous cycle. The water is first cooled to a temperature of 4°C in machines called chillers. It is then sent to individual units that cool the air in each room. As the water flows through the building, it gradually becomes warmer. Finally, it reaches the roof, where it is left to cool down naturally in a water tower. After that it is returned to the chillers, where the cycle begins again.
Toronto lies on the shore of Lake Ontario, one of North America’s Great Lakes, and the new system makes use of cold water taken from about 80 meters below the surface of the lake. At this depth, the water in the lake remains at 4°C all year round. This is exactly the temperature to which the water in air-conditioning systems is cooled. However, the water from the lake is not pumped directly into the air-conditioning systems. Instead, it is used to cool the water that is already inside the air-conditioning systems. After that, the lake water is added to the city’s ordinary water supply.
Enwave, the company that developed this deep-lake cooling system, says that it uses 75 percent less energy than traditional air conditioning. And since no CFCs are used, no damage can be caused to the ozone layer. Not every city is located next to a large lake, but experts believe that systems like the one being used in Toronto could be built elsewhere by using other natural sources of cold water.
What is one problem with traditional air-conditioning systems?
选项
A、The chemicals they use sometimes pollute the water supply.
B、They often damage the buildings that they are trying to cool.
C、There are not enough CFCs in the world to cool all the buildings.
D、The method they use to cool water is thought to harm the ozone layer.
答案
D
解析
细节题。短文第一段指出传统的空调系统会对环境造成伤害.其中一个危害就是In addition,the water…using chemicals called chlorofluorocarbons…believedto damage the Earth’s ozone layer.即在水冷却过程中使用的CFCs会破坏地球的臭氧层。故选D。
转载请注明原文地址:https://jikaoti.com/ti/PP4FFFFM
0
大学英语四级
相关试题推荐
与全国大多数其他城市的人相比,广州人的平均收入很高,小康之家越来越多。因此,广州人上馆子很常见。广州的餐馆整天宾客满座,因为广州人似乎特爱享用美食。他们喜欢上馆子喝早茶(morningtea)。在那里,小推车(carts)上装着各种“点心”(dimsu
EarlierthisyearImetwithagroupofwomeninMatela,asmallfarmingvillageinTanzania,andwediscussedsomethingthat’s
EarlierthisyearImetwithagroupofwomeninMatela,asmallfarmingvillageinTanzania,andwediscussedsomethingthat’s
ABriefHistoryofOnlineShoppingA)WhenAmazon.comopenedforbusiness15yearsago,itwasnothingmorethanafewpeoplepac
Duringthenineteenthcentury,whenlittlewasknownaboutenvironmentalismandconservation,itwascommontohearpeopleinEu
Oneinsix.Believeitornot,that’sthenumberofAmericanswhostrugglewithhunger.Tomaketomorrowalittlebetter,Feedin
A、Themanshouldlosesomeweight.B、Themanisinpoorhealth.C、Theoilyfoodisharmfultotheman’shealth.D、Thewomanwoul
Isitcheapertobeawoman—oraman?A)Tocelebratethelaunchofgenderequalityinfinancialservices,Moneyexploredothera
Junkfoodiseverywhere.We’reeatingwaytoomuchofit.Mostofusknowwhatwe’redoingandyetwedoitanyway.Sohere’
随机试题
股骨颈骨折引起股骨头坏死的主要原因是
曲线在与它平行的面上的投影不反映实长。()
熔结环氧粉末防腐工艺为除锈、微尘处理、加热、()、冷却和检验。
子宫脱垂患者,宫颈及部分宫体脱出阴道口,应属
庆大霉素的适应证不包括
张、王、李、赵四人进入乒乓球的半决赛。甲、乙、丙、丁四位教练对半决赛结果有如下预测:甲:小张未进决赛,除非小李进决赛。乙:小张进决赛,小李未进决赛。丙:如果小王进决赛,则小赵未进决赛。丁:小王和小李都未进决赛。如果
一个年轻人乘火车路过一片荒无人烟的山野。乘客们一个个百无聊赖地望着窗外,火车路过一个拐弯的地方开始减速,一座平房慢慢进入人们的视野。这本是一间普通的平房,却让无聊的旅客们顿时有了精神。都饶有兴致地欣赏起这道寂寞旅途中的特别风景。看着这样的情景,这个年轻人心
根据以下资料,回答问题。2008年1—5月,移动电话长途通话时长约是固定传统长途电话通话时长的多少倍?()
A、 B、 C、 D、 B原数列为:转化为:分母1,4,7,10,13为等差数列,分子2,4,6,8,10也为等差数列,由此知:
古代法典中,标志着古代法典体例由繁到简过程完成的是()
最新回复
(
0
)