2. 外语
  3. Every human being,【C1】______what he is doing, gives off body heat. The usual problem is【C2】______dispose of it. But the designer

Every human being,【C1】______what he is doing, gives off body heat. The usual problem is【C2】______dispose of it. But the designer

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问题    Every human being,【C1】______what he is doing, gives off body heat. The usual problem is【C2】______dispose of it. But the designers of the Johnstown campus of University of Pittsburgh set themselves the【C3】______problem how to collect body heat. They have designed a collection system which utilizes【C4】______body heat, but the heat given off by such objects【C5】______light bulbs and refrigerators as well. The system works so well【C6】______no conventional fuel is needed【C7】______the campus’s six buildings comfortable.
   Some parts of most modern building, theatres and offices【C8】______classrooms -- are more than amply heated by people and lights and sometimes must be air-conditioned and【C9】______in winter. The technique of【C10】______heat and redistributing it is【C11】______“heat recovery”. A few modem buildings recover【C12】______, but the university’s system is the first to recover heat【C13】______some buildings and reuse it in【C14】______. Along the way, Pitt has learned a great deal about some of its heat producers. The【C15】______a student studies, the more heat his body【C16】______. Male students emit more than【C17】______students, and the larger a student, the more heat he【C18】______. It is tempting to【C19】______that the hot test prospect for the Johnstown campus would be a【C20】______over weight male genius.  
【C13】
选项 A、to
B、from
C、with
D、for
答案B
解析 recover heat from buildings从建筑物中回收热量。
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