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【单选题】
密度为 1000kg/m 3 的流体,在 Φ108×4 的流动,流速为 2m/s ,流体的粘度为 1cP ,其 Re 为( )。A.
10 5
B.
2 × 10 5
C.
2 × 10 6
D.
2 × 10 7
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举一反三
【单选题】What is the noun of communicate?
A.
communication
B.
communicative
C.
communicate
D.
communicating
【单选题】You should better their children. [ ]
A.
communicate; with
B.
communicates; to
C.
to communicate; at
D.
communicated; for
【单选题】Teachers should _____ better _____ their students.
A.
communicate; with
B.
communicate; to
C.
to communicate; with
D.
communicated; by
【单选题】It is a good way to ______ foreigners in English. [ ]
A.
communicate with
B.
communicate to
C.
tell with
D.
say .
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