词义猜测题

　　A

　　(2017·北京东城期末检测)

　　The extraordinary Eastgate Building in Harare,Zimbabwe’s capital city,is said to be the only one in the world to use the same cooling and heating principles as the termite mound(白蚁丘).

　　Architect Mick Pearce used precisely the same strategy when designing the Eastgate Building,which has no air-conditioning and almost no heating.The building—the country’s largest commercial and shopping complex—uses less than 10% of the energy of a conventional building of its size.The Eastgate’s owners saved $3.5 million on a $36 million building because an air-conditioning plant didn’t have to be imported.

　　The complex is actually two buildings linked by bridges across a shady,glass-roofed atrium(天井) open to the air.Fans suck fresh air in from the atrium,blow it upstairs through hollow spaces under the floors and from there into each office through baseboard vents(出口).As it rises and warms,it is drawn out via ceiling vents and finally exists through forty-eight brick chimneys.

　　During summer’s cool nights,big fans blow air through the building seven times an hour to cool the empty floors.By day,smaller fans blow two changes of air an hour through the building to circulate the air which has been in contact with the cool floors.For winter days,there are small heaters in the vents.

　　This is all possible only because Harare is 1,600 feet above sea level,has cloudless skies,little dampness and rapid temperature swings—days as warm as 31℃ commonly drop to 14℃ at night.“You couldn’t do this in New York,with its fantastically hot summers and fantastically cold winters,” Pearce said.

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