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The primary purpose, of the passage is to______ It can be inferred from the passage that, in the course of a heating season, th
The primary purpose, of the passage is to______ It can be inferred from the passage that, in the course of a heating season, th
admin
2009-04-27
41
问题
The primary purpose, of the passage is to______
It can be inferred from the passage that, in the course of a heating season, the heatingcapacity of h heat pump is greatest when______
选项
A、heating is least essential
B、electricity rates are lowest
C、its compressor runs the fastest
D、outdoor temperatures hold steady
答案
A
解析
第五段第二、四句指出,热泵的制热能力随着室外温度下降而降低。原因是:被压缩的制冷剂容量减少,通过热泵循环传送的热负荷就越少。可见,随着温度升高,加热就没有必要。
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考研英语一
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