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【单选题】
The Reynolds upper cirtical number is:( )A.
a critical value while burbulent flow turns into laminar flow
B.
about 2000
C.
practically irrelevant on sloving problem about flow in pipe
D.
a critical value while laminar flow turns into turbulent flow
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举一反三
【单选题】The young for growing independence while the elder want their son or daughter to listen to them.
A.
tended to ask
B.
tends asking
C.
tend to ask
D.
tend toward asking
【简答题】看图填空。 Word list: head hand foot arm leg
【简答题】Listen to the conversation between Ted and Ana. Are the following staments true or false?
【单选题】---Listen! The fire engine is roaring! (消防车吼叫) --- Oh, there ______ be a fire somewhere. How terrible!
A.
should
B.
must
C.
have to
D.
will
【简答题】Word List 3~4.doc
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