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【判断题】
温度边界层越薄,则对流换热系数越小,为了强化传热,应使温度边界层越厚越好。A.
正确
B.
错误
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【单选题】American students spend ________ time _______ homework than Chinese students. [ ]
A.
fewer, doing
B.
less, to do
C.
less, doing
D.
least, doing
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