首页
登录
职称英语
As the cost of gas and oil for home heating has gone up, many Americans hav
As the cost of gas and oil for home heating has gone up, many Americans hav
游客
2024-10-09
44
管理
问题
As the cost of gas and oil for home heating has gone up, many Americans have switched from these fuels to wood for heating their homes. In 1973, approximately 200,000 wood-burning stoves, intended for home use, were sold in the United States; by 1979, this figure had reached one million; and by the end of 1981, there were as many as seven million home owned wood-burning units in operation in the U. S.
In addition to low fuel bills, many people choose these stoves because their initial cost is very low (the prices range from $ 50 kits to $ 5,000 top-of-the-line models), and because new technology has made wood fires more efficient, cleaner, and, therefore, safer than ever before.
One new technological feature of this type is the catalytic(催化) combustor which adds about $ 100 to $ 200 to the cost of the stove, but which causes much more complete combustion (燃烧) of the wood and therefore bums up more of the pollutants left by incomplete combustion and produces more heat.
A second cost-saving innovation is a device which agitates the wood, increasing the amount of oxygen that reaches the center of the wood pile, and leading to more efficient combustion. The real advantage of this device is that it allows the owner to make use of cheap sources of wood such as dirty wood chips (an industrial by-product) that have almost no commercial value, cost as little as $ 20 a ton, and burn very inefficiently in furnaces without an agitator. [br] Which one of the following is NOT true for the reason why people prefer to buy wood-burning stoves?
选项
A、The initial cost is very low.
B、The fuel costs are cheaper.
C、Wood fires are more efficient, cleaner, and safer than ever before.
D、The wood-burning stoves are more efficient than gas or oil ones.
答案
D
解析
文中第二段指出:many people choose these stoves because their initial cost is very low,and because new technology has made wood fires more efficient,cleaner,and,therefore,safer than ever before,所以D、C两项可排除,第二段开头就有In addition to low fuel bills,加上开头段As the cost of g
转载请注明原文地址:http://tihaiku.com/zcyy/3793418.html
相关试题推荐
YoungerAmericanswillhavetotakeourwordforit;therewasatime,wayb
MillionsofAmericansruntothebankorvisitautomatedtellermachineswh
MillionsofAmericansruntothebankorvisitautomatedtellermachineswh
MillionsofAmericansruntothebankorvisitautomatedtellermachineswh
Asthecostofgasandoilforhomeheatinghasgoneup,manyAmericanshav
Asthecostofgasandoilforhomeheatinghasgoneup,manyAmericanshav
Asthecostofgasandoilforhomeheatinghasgoneup,manyAmericanshav
Asthecostofgasandoilforhomeheatinghasgoneup,manyAmericanshav
Myfatherissodeafthathehastouseaheating______.A、helpB、aidC、support
Whatdoesthenewscover?[originaltext]Americansarecelebratingthe4tho
随机试题
Whatkindofjobsseemstobeinshortsupply?[originaltext]W:Hey,James,how
Whydoestheelectriccarseemtobethebestalternativesofar?[br][origina
[audioFiles]2017m5x/audio_ezfj_118_170517[/audioFiles]BellInancientt
Americanculturehasbeenenrichedbythevaluesandbeliefsystemsofvirtu
如今大学生的生活方式正在发生着变化。越来越多的学生课余时间足不出户,变成了宅男宅女(indoors-manorindoorswoman)。网络为学生
设总体X服从均匀分布U(1,θ), 则θ的矩估计为( )。
道路运输行政属于专业行政部门,下列不属于其行政管理规则的是()。A.权限界定
深圳证券交易所规定,上市公司出现下列()情形的,为存在股票终止上市风
某cosφ为0.4的感性负载,外加100V的直流电压时,消耗功率100W,则该感
关于工程项目投标报价技巧的说法,赶工补偿正确的是( )。A.愿意承揽的项目,报
最新回复
(
0
)