在航空运输中，承运人可根据需要改变运输方式或更换飞机，不需要事先通知货主或代理人。()
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在存在现金折扣的情况下，企业应收账款的入账金额是（）。
A. 扣除现金折扣之前的售价
B. 扣除现金折扣之后的售价
C. 净价
D. 售价加上增值税
If the economy is in the liquidity trap, an increase in the money supply______.
A. raises interest rates
B. lowers interest rates
C. has no significant effect on interest rates
D. causes inflation
Which of the following cannot be controlled precisely by the central bank？______.
A. The discount rate
B. Reserve requirements
C. Total bank reserves
D. None of the above
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