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【多选题】
辐射换热计算的简化假设包括:A.
表面之间是不参与辐射的介质或真空。
B.
每个表面灰体。
C.
每个表面的温度、辐射特性及投入辐射分布均匀。
D.
每个表面都是黑体。
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【单选题】听力原文： When you have a dog it is necessary to care for it carefully. In return you will be loved by your dog. The most important part of dog-care is to keep the dog clean. Not only does the dog have to...
A.
As long as possible,
B.
At least 30 minutes.
C.
All day.
D.
No more than 30 minutes.
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【简答题】常见的施工组织方式有依次施工、 和流水施工。
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