半结构化数据中,不同实体具有的属性会有一定程度的不同。( )
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二维表属于半结构化数据。( )
A. 对
B. 错
Most economists use the aggregate demand and aggregate supply model primarily to analyze ()
A. short-run econimc fluctuations in the economy.
B. the effects of macroeconomic policy on the prices of individual goods.
C. the long-run effects of international trade policies.
D. productivity and economic growth.
Which of the following typically rises during a recession? ()
A. consumption
B. unemployment
C. corporate profits
D. automobile sales
The variables on the vertical and horizontal axes of the aggregate demand and supply graph are ()
A. the price level and real output.
B. real output and employment.
C. employment and the inflation rate.
D. the value of money and the price level.
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