宏观经济的几个选择题?

宏观经济的几个选择题?
1.The basic tools of supply and demand are
a.useful only in the analysis of economic behavior in individual markets.
b.useful in analyzing the overall economy,but not in analyzing individual markets.
c.central to microeconomic analysis,but seldom used in macroeconomic analysis.
d.central to macroeconomic analysis as well as to microeconomic analysis.
2.A German citizen buys an automobile produced in the United States by a Japanese company.As a result,
a.U.S.net exports increase,U.S.GNP and GDP are unaffected,Japanese GNP increases,German net exports decrease,and German GNP and GDP are unaffected.
b.U.S.net exports,GNP,and GDP increase,Japanese GDP increases,German net exports decrease,and German GDP is unaffected.
c.U.S.net exports and GDP increase,Japanese GNP increases,German net exports decrease,and German GDP and GNP are unaffected.
d.U.S.net exports,GNP,and GDP are unaffected,Japanese GNP increases,German net exports decrease,and German GDP and GNP fall.
3.If total spending rises from one year to the next,then
a.the economy must be producing a larger output of goods and services.
b.prices at which goods and services are sold must be higher.
c.either the economy must be producing a larger output of goods and services,or the prices at which goods and services are sold must be higher,or both.
d.employment or productivity must be rising.

D C C
额,和上一位答案一样..
解释下第二题好了：
GNP 国民生产总值
GDP 国内生产总值
前者的衡量标准是该国公民,后者侧重的是该国的地域范围.
net export = export - import