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【简答题】
Laminar—or streamline—flow moves through a system in thin cylindrical layers of liquid flowing in fashion. This type of flow will have little if any (swirling or eddying) in it. Laminar flow usually exists at low flow rates. As flow rates increase, the laminar flow pattern changes into a flow pattern. Turbulent flow is the random movement or mixing of fluids. Once the turbulent flow is initiated, molecular activity speeds up until the fluid is uniformly turbulent.
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举一反三
【单选题】When the Fed buys government bonds, the reserves of the banking system( )
A.
increase, so the money supply increases.
B.
increase, so the money supply decreases.
C.
decrease, so the money supply increases.
D.
decrease, so the money supply decreases.
【简答题】_____是指政府对某种商品所规定的最高价格，是政府为了保护消费者利益而制定的。 a. 最低限价 b. 最高限价 c. 最低工资 d. 最高工资
【单选题】The Fed buys U.S. government securities from banks in order to
A.
lower the federal funds rate.
B.
reduce the government's budget deficit.
C.
decrease banks' reserves.
D.
None of the above answers are correct.
【单选题】最低限价制是指一国政府规定某种进口商品的最低价格，凡进口商品的价格低于这个标准，就加征（）或禁止进口的一种制度。
A.
进口税
B.
进口附加税
C.
附加税
D.
商品税
【单选题】If the Fed buys U.S. government securities,
A.
the federal funds rate will fall.
B.
the federal funds rate will rise.
C.
bank reserves will decrease.
D.
the discount rate will rise.
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