答案:A
三、阅读理解
Peabody Architects says it is building the first passive home in Washington.However,it will not be the last.In Arlington,Roger Lin and his brother are also building one.Roger explains that windows are sealed and have three layers of glass.The windows are airtight(密封的).On a cold winter day,the temperature inside the unfinished home is about 12℃,which is comfortable.
David Peabody says you can find passive homes all over the world.“North Africa,for example,has a passive house community designed for very hot dry climates and that’s a whole other area of exploration for passive houses,”he says.The first passive design was an apartment building in Darmstadt,Germany.Two physicists helped develop it about twenty years ago.
Passive houses use some specialized materials.They also need to have special air treatment systems.Supporters say they cost only about 6% more than traditional homes.But they use 10% of the energy for heating and cooling.But Passive House Institute US says even greater savings can be reached with additions like solar water heating systems.They might call that an active passive house.
为了节约能源,人们开始设计并建造被动式住宅。
1.What is the purpose of designing a passive house?
A.To save money on its construction.
B.To reduce energy demand.
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