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【单选题】
关于Nu数的说法错误的是：A.
对流换热问题中Nu数是待定特征数。
B.
Nu数是无量纲的。
C.
Nu数表征流体动量扩散能力和热量扩散能力的相对大小。
D.
Nu数反映了对流换热的强弱。
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皮皮学刷刷变学霸
举一反三
【简答题】Alan often goes without meals and sleep when_____.
【单选题】Lucy often goes to school _____ eating breakfast. It's bad for her health. [ ]
A.
with
B.
without
C.
from
D.
under
【单选题】Kate often goes to work _____ breakfast. It's bad for her health. [ ]
A.
with
B.
without
C.
on
D.
not have
【简答题】It goes without saying that the local government will__________________(干预这件事情) and solve the problem properly.
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