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【单选题】
下列对于对流传热系数α说法不正确的是( )A.
强制对流的α值大于自然对流的α值
B.
相同流体湍流时的α值大于层流时的α值
C.
液体有相变时的α值大于层流时的α值
D.
α值不受流体密度和黏度的影响
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皮皮学刷刷变学霸
举一反三
【单选题】What has the woman mainly been thinking about?
A.
The weather.
B.
A vacation.
C.
Going skiing.
D.
Her studies.
【简答题】从逻辑上推理，（）的出现是信用关系存在的前提条件。
【单选题】听力原文：Seven. What has the woman just bought? Woman: What do you think? I found it in that new department store yesterday. I think it's perfect. It'll keep the sun off my face and it'll go really well w...
A.
&ndsp
B.
&ndsp
C.
&ndsp
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