皮皮学，免费搜题
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搜题
【单选题】
Question 5 to 7 are baseed on the news report you have just heard. 5.A.
America's growing trade deficit with China.
B.
The inflation caused by the rising oil prices.
C.
America's trade policies with major trading partners.
D.
The bleak economic outlook for Asian economics.
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知识点：
皮皮学刷刷变学霸
举一反三
【单选题】某输水管道直径d=50mm，管道中流速v=1.6m/s，运动粘滞系数ν=0.01118cm2/s，则雷诺数近似为
A.
19554
B.
71556.35
C.
7195
D.
45971