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
61
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 advantage of Enwave’ s new system?
选项
A、It keeps buildings much cooler than other methods.
B、It can be used by large cities anywhere in the world.
C、It is much more energy-efficient than traditional systems.
D、It keeps water from being used for more than one purpose.
答案
C
解析
细节题。短文最后一段第一句指出Enwave…deep-lake cooling system.says that it uses 75 percent less energy than traditional air conditioning.即与传统的空调系统相比,Enwave公司设计的这种新的制冷系统使用的能源要少75%,由此可知.选项C正确。
转载请注明原文地址:https://kaotiyun.com/show/ywq7777K
0
大学英语四级
相关试题推荐
Alotofpeopleinstinctivelybelieve—withoutreallyknowing—thatpoorreadersarenotespeciallysmart.Anewstudybyres
Alotofpeopleinstinctivelybelieve—withoutreallyknowing—thatpoorreadersarenotespeciallysmart.Anewstudybyres
ToHelptheKids,ParentsGoBacktoSchoolA)Forafewyearsnow,everyparentofanewbornbabyintheSouthFloridadistrict
Lookingforanewweightlossplan?Trylivingontopofamountain.Mountainaircontainslessoxygenthanairatloweraltitud
A、Theloaningrateistoohigh.B、Theloanprocedureiscomplex.C、Shewouldn’tbeabletogetaloan.D、Shehatestohavedebt
ThePeakTimeforEverythingA)Couldyoupackmoreintoeachdayifyoudideverythingattheoptimaltime?Agrowingbodyofre
A、Thereisstillsomeroomforimprovement.B、Thelanguageishardtounderstand.C、Thedescriptionoftheexperimentistoodet
BeautyandBodyImageintheMediaA)Imagesoffemalebodiesareeverywhere.Women—andtheirbodyparts—selleverythingfromfoo
随机试题
企业确定库存量的依据很多,其中采用经济订购批量是最普遍的做法。由于企业拥有商品库存的目的是为满足顾客要求,所以库存控制需要在()之间进行权衡。
根据数据的观测方法和来源划分,研究数据可以分为()
正常小儿,体重8kg,身长68cm,前囟1cm,有乳牙3颗。其可能达到的发育水平是
胆汁中参与脂肪消化和吸收的主要成分是()。
患儿,7岁,3周前曾患上呼吸道感染,3日来眼睑浮肿,尿少,有肉眼血尿。体检:咽部不充血,眼睑浮肿,血压150/110mmHg,尿蛋白(+++),有大量红细胞,抗“O”500U,补体C3下降。该患儿最可能的诊断是
左旋多巴治疗震颤麻痹,指出下列的错误说法
骨肉瘤好发年龄是()。
乙炔站房内的仪表必须应用()型仪表。
材料:下面是赵老师关于“长江”的教学过程设计:(1)创设情境,引入新课教师播放《长江之歌》的视频。激昂而悦耳的歌声、滚滚长江水的画面、壮丽的三峡等情境,一方面给学生以美的享受,另一方面使教师非常自然地导入了新课。(2
当前,搞好乡镇改革,化解乡村债务是难题,妥善解决这个问题,应掌握的政策是( )。
最新回复
(
0
)