绝热过程中系统对外做功全部以系统内能减少为代价的
A. 对
B. 错
Which of the following would be counted in the calculation of GDP?
A. the sale of a rare coin to a coin collector
B. homes that are rebuilt after being completely destroyed by a hurricane
C. the sale of a 1966 Ford Fairmont.
D. the sale of cocaine in the black market.
The largest component of GDP is
A. net exports.
B. consumption.
C. government purchases.
D. investment.
Which two of the following are considered measures of income for an economy?
A. gross national product and net national product
B. net national profits and personal income
C. gross national product and net national investment
D. disposable personal income and personal profits
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