单项选择题

The Phillips curve shows the trade-off between:（）

A. the rate of change in the money supply and the rate of change in employment.
B. nominal interest rates and real interest rates.
C. inflation and unemployment.

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单项选择题The short-run relationship between unexpected inflation and:（）

A. unemployment is positive.
B. unemployment is negative.
C. actual inflation is positive.

单项选择题A recession is defined as a period during which real gross domestic product (GDP) declines for:（）

A. one or more successive quarters.
B. two or more successive quarters.
C. three or more successive quarters.