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【单选题】
为了判断强度均值为35 k9／cm2的金属材料在经改进后的强度是否提高，随机抽取了20个样品，测得强度平均值为36．2 kg／cm2，则下列说法中，正确的是( )。A.
只提高1．2 kg／cm2，强度提高肯定不显著
B.
需要使用单总体t检验来判断改进后的强度是否比原来有显著提高
C.
改进后强度平均值为36．2 kg／cm2，确实比原来有所提高
D.
因为没有提供总体标准差的信息，因而无法做出判断
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【单选题】Which of the following is a possible benefit of international macroeconomic policy coordination?
A.
International macroeconomic policy coordination gives countries the political cover to abolish import tariffs and export taxes.
B.
International macroeconomic policy coordination gives countries the opportunity to consider spillover effects on other countries that arise from interdependence.
C.
International macroeconomic policy coordination builds a forum where developing countries can come up with a common political agend
D.
International macroeconomic policy coordination helps stronger countries to impose their prescribed economic policies on weaker countries.
【单选题】The output of our company this month is _______ that of last month.
A.
twice as much as
B.
twice as much
C.
twice many as
D.
twice as many as
【单选题】Macroeconomic models are used to explain how ______ variables influence ______ variables.
A.
endogenous; exogenous
B.
exogenous; endogenous
C.
microeconomic; macroeconomic
D.
macroeconomic; microeconomic
【单选题】A market decline of 23% on a day when there is no significant macroeconomic event ______ consistent with the EMH because ________.
A.
would be; it was a clear response to macroeconomic news
B.
would be; it was not a clear response to macroeconomic news
C.
would not be; it was a clear response to macroeconomic news
D.
would not be; it was not a clear response to macroeconomic news
【简答题】The a___________ temperature in Hangzhou last month was 22℃. 2. The little boy was very c________1. The a___________ temperature in Hangzhou last month was 22℃. 2. The little boy was very c___________...
【单选题】The main goal of macroeconomic research is to
A.
predict how the macroeconomy will perform in the future.
B.
analyze current macroeconomic data.
C.
develop new data that can be used to understand better the operation of the economy.
D.
make general statements about how the economy works.
【单选题】Macroeconomic models:
A.
assume all wages and prices are sticky.
B.
assume all wages and prices are flexible.
C.
make different assumptions to explain different aspects of the macroeconomy.
D.
focus primarily on the optimizing behavior of households and firms.
【简答题】听对话，回答问题。 1. When did Jim begin to cough? A. Last night. B. last week. C. Last month. 2. What did the boy have for breakfast this morning? A. A little milk and an egg. B. A little coffee and some brea...
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