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
In 1983, when oil prices were still high in my area, I installed a ground-source heat pump in my brand-new, well-insulated, 1,60
In 1983, when oil prices were still high in my area, I installed a ground-source heat pump in my brand-new, well-insulated, 1,60
admin
2010-01-15
61
问题
In 1983, when oil prices were still high in my area, I installed a ground-source heat pump in my brand-new, well-insulated, 1,600-square-foot house. It cost several thousand dollars more than comparable systems that use oil, gas or wood, but I figured I’d recover my higher initial expense m a few years through lower energy bills.
True, my heat pump runs on electricity -- an expensive commodity where I live. But most of its energy comes from the earth, a propylene-glycol solution circulates through 1,200 feet of two-inch-diameter plastic pipe buried three feet deep in a field next to my house. As it travels, the solution absorbs heat from the surrounding soil, even when soil temperature drops below freezing.
My ground-source heat pump also offers important benefits that have nothing to do with economics.
-- Minimal fire hazard -- no chimney, firebox, or heating elements -- only pumps, fans, and a compressor.
-- Cleanliness -- no combustion products, thus no chance of my heating system polluting the indoor air, leaving scummy deposits on walls and furniture.
-- Reliability -- solid-state electronic controls and sealed bearings almost eliminate breakdowns.
-- No maintenance -- no wood to cut, ashes to haul, or chimney to clean.
-- Convenience -- The system runs automatically, even switching from heating to air conditioning as needed. I can simply lock the door and go away for a day, week or month.
Not only did I expect to start saving on energy costs immediately, but I also expected those savings to grow over the years as oil prices continued to soar. Since I was wrong about oil prices, the big dollar savings I’d hoped for haven’t materialized. Nevertheless, I am satisfied, all things considered.
One benefit the author mentions is that the system ______
选项
A、uses no electricity
B、has a fire-safety shutoff
C、docs not pollute the air in the house
D、requires less insulation in house walls
答案
C
解析
本题询问该系统的优点。文中列举了五个优点,并有记号一一标出。与原文相比可 知,只有C项是属于优点之一的,原文为“Cleanliness—no combustion products, thus no chance of my heating system polluting the indoor air"。
转载请注明原文地址:https://kaotiyun.com/show/DXnK777K
0
专业英语四级
相关试题推荐
Theoilindustryhasbeenonahotstreakthisyear,thankstoaseriesofmajordiscoveriesthathaverekindledasenseofex
PeoplewhogrewupinAmericaandWesternEuropehavebecomeusedtotheideathattheWestdominatestheworldeconomy.Inf
Anarrowingofyourinterestsisimpliedinalmostanytransitionfromastudyenvironmenttomanagerialorprofessionalwork
A、Becauseitistheeasiesttopictowrite.B、Becauseitisauniquetopictowrite.C、Becauseitisthemostessentialtechnolo
TheMessagesinDistanceI.Peoplefromdifferentcultures【T1】________differentlyA.NorthAmericansstandabouttwofeetapa
PassageThreeWhatdidBobsuggestbysaying"Youcouldn’thavedraggedJimmyoutofNewYork;hethoughtitwastheonlyplac
Whatdoesthewomanthinkoftheroommate’smusic?
WhydoesDaveneedaroommate?
WhydoesDaveneedaroommate?
TheNationalGalleryinLondonhasmorevisitorsthan_______anyotherbecauseofitsfreeadmission.
随机试题
当代儿童发展观的基本内涵是什么?
A.气虚B.血虚C.血瘀D.肝郁月经先期,量多色淡是
治疗心力衰竭最常用的药物是
A.视神经盘B.视网膜中央凹C.视网膜周边部D.鼻侧视网膜E.颞侧视网膜视网膜上只有视锥细胞分布的区域是
按监察的(),可将土地监察划分为守法监察和执法监察。
在企业会计核算中,必须按照国家统一规定的会计处理方法进行核算,这符合()。
纳税人自产自用的下列应税消费品中,不缴纳消费税的是()。
我国在对资本主义工商业进行社会主义改造过程中创造的国家资本主义的低级形式有()。
积分=________.
Hewasreadingexcitedlythebookpublishedbyhiscompanyin______withafamouspress.
最新回复
(
0
)