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【单选题】
某热力管道采用两种导热系数不同的保温材料进行保温，为了达到较好的保温效果，哪种材料放在内层?A.
导热系数较大的材料
B.
导热系数较小的材料
C.
无法确定
D.
导热系数小的放在内层和导热系数大的放在内层的效果一样
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举一反三
【简答题】It may be a list or set of the elements belonging to the population with every element included once and only once.
【简答题】地区经济一体化的形式有哪些?
【单选题】Which may be put before a list, a quotation, direct speech or an explanation to introduce it?
A.
a hyphen
B.
a colon
C.
a semi-colon
【简答题】经济一体化形成的原因是什么?主要形式有哪些?
【单选题】It may be the last book you'll ever buy. And certainly, from a practical standpoint, it will be the only book you'll ever need. No, it's not the Bible or some New Age tome promising enlightenment—alth...
A.
Similarities between computer stored information and electronic books.
B.
Content kept in electronic books.
C.
Different types of electronic books.
D.
Development of electronic books in future.
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