试题与答案

常用的低温热水采暖系统中的供水温度为( ),回水温度一般为( )。A.70℃ B

题型:单项选择题

题目:

常用的低温热水采暖系统中的供水温度为( ),回水温度一般为( )。

A.70℃

B.80℃

C.85℃

D.95℃

答案:

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小题1:B【小题 2】C小题3:D 小题4:A小题1:主旨大意题。本文讲述了主人公Franklin的一系列事情,第一自然段作者提到"The fourth——was left out ",最后一段也提到"She contributed more than any ...

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