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
49
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
A、Themanmaybepaidlessafterretirement.B、Themanisgoingtobedismissed.C、Themanhasretiredforalongtime.D、Thema
ToHelptheKids,ParentsGoBacktoSchoolA)Forafewyearsnow,everyparentofanewbornbabyintheSouthFloridadistrict
ToHelptheKids,ParentsGoBacktoSchoolA)Forafewyearsnow,everyparentofanewbornbabyintheSouthFloridadistrict
ABriefHistoryofOnlineShoppingA)WhenAmazon.comopenedforbusiness15yearsago,itwasnothingmorethanafewpeoplepac
BarackandMichelleObamaunderstandtheheavyburdenofstudentloandebt.TheObamasdidnotpayofftheirstudentloansuntil
A、Checkiftheprogramisinteresting.B、Judgeiftheprogramissuitableforthem.C、Checkiftheyhavefinishedtheirhomework
Lookingforanewweightlossplan?Trylivingontopofamountain.Mountainaircontainslessoxygenthanairatloweraltitud
Oneinsix.Believeitornot,that’sthenumberofAmericanswhostrugglewithhunger.Tomaketomorrowalittlebetter,Feedin
A、Drinkingsodaisgoodforhishealth.B、Heshoulddrinkmuchsodaeveryday.C、Drinkingsodahasnothingtodowithhisweight
A、Designingaterrificweb.B、Designingabasicweb.C、BuildingaterrificBBS.D、Designingaterrificprogram.B事实细节题。对话中女士说自已并
随机试题
因对微博如何使用的无知,某局长和某主任在微博上泄露个人隐私,暴露其不道德行为,受到有关部门的查处。有网友对他们的行为冷嘲热讽,感慨道:“知识改变命运,没有知识也改变命运。”以下哪项陈述最接近该网友所表达的意思?
甲签发票据给乙,丙从乙处窃取票据,丁明知丙是窃取而受让票据,丁又将票据赠与不知情的戊。下列说法哪些正确?()
太阳能路灯照明系统的最佳光源是()。
以下合同中( )合同是可撤销合同。
养老金社会化发放不包括:()。
该长期借款的资本成本率为( )。该债券的资本成本率为( )。
对承运方来说,货物运输费用又由三部分构成:______、可变费用和______。
简述教师行动研究的实施步骤。
法律事实,是指能够引起法律关系产生、变更和消灭的现象和事实,法律事实包括法律事件和法律行为。其中,法律事件是法律规范规定的不以当事人的意志为转移的客观事实,法律行为是当事人在自主意志支配下有意识地改变法律关系的活动。根据上述定义,下列不属于法律事
下列叙述中正确的是
最新回复
(
0
)