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
16
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.
According to the passage, the author’s heat pump requires ______
选项
A、no maintenance
B、very little maintenance
C、only a yearly check of controls
D、no more maintenance than an oil burner
答案
A
解析
本题是细节题。文中明确写到“No maintenance",因此正确答案一目了然。
转载请注明原文地址:https://kaotiyun.com/show/xXnK777K
0
专业英语四级
相关试题推荐
PASSAGETWOInthelastparagraph,whatdothethreeexamplesillustrate?
Evenifpricesshootbacktoward$50abarrel,thatwon’tweantheworldfromoil.Onlygovernmentcandothat.Istheinter
(1)Afteralongdayattheoffice,manyofusfindourselvestakingoutourstressonfriends,children,orsignificantothe
(1)SocialmobilityintheU.K.couldbereversedunlessthegovernmentanduniversitiesmakechangestoencourageandpayfo
FiveVirtuesofStyleI.Correctness—Followcorrectusageofwords,grammarand【T1】______rules—Reasons
PassageTwo(1)Resultsdayhasatime-wornrhythm,fullofannualtropes:localnewspaperpicturesofenvelope-clutchinggi
Librariesareinsomewaythebestevidencewehaveofcivilization.Inthemistheaccumulatedknowledgeoftheages.Thecore
WhatadvicedidthedoctorgiveMr.Smith?
You______Donnatotellherthenewsyesterday.Ihavetoldheronthephone.
You______Donnatotellherthenewsyesterday.Ihavetoldheronthephone.
随机试题
急性肾炎(阳水)风水相搏型的证候特征是( )急性肾炎(阳水)湿热内蕴型的证候特征是( )
胸部外伤早期剖胸探查的指征是
A.101xB.401xC.60lxD.≥100lxE.≥150lx音乐厅的照度标准为
A.丙酸倍氯米松B.沙美特罗C.异丙托溴铵D.扎鲁司特E.茶碱分子内有嘌呤结构()。
下列哪些情形对合一方的行为在法律上没有被明文规定为犯罪?
(2006年)如图6-12所示,两水箱水位恒定,水面高差H=10m,已知管道沿程水头损失为:hf=6.8m,局部阻力系数:转弯0.8、阀门0.26、进口0.5、出口0.8,则通过管道的平均流速为()m/s。
下列属于证券公司的资产管理业务的是()。
某企业是一家传统加工企业,仅有一个或几个间接成本集合,成本集合通常缺乏“同质性”。该公司适宜采纳的成本核算制度是()。
与“究天人之际,通古今之变,成一家之言”这句话同出一人之口的是()。
She______thehighunemploymentfiguresasevidenceofthefailureofthegovernmentpolicy.
最新回复
(
0
)