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【判断题】
可关断晶闸一种器件A.
正确
B.
错误
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举一反三
【单选题】Economists make assumptions to
A.
provide issues for political discussion.
B.
make a complex world easier to understand.
C.
make it easier to teach economic concepts and analysis.
D.
advancing their political agendas.
【判断题】Economists acting as scientists make positive statements, while economists acting as policy advisers make normative statements.
A.
正确
B.
错误
【单选题】Economists make assumptions
A.
to diminish the chance of wrong answers.
B.
to make the world easier to understand.
C.
because all scientists make assumptions.
D.
to make certain that all necessary variables are included.
【单选题】Economists make assumptions to
A.
provide issues for political discussion.
B.
make a complex world easier to understand.
C.
make it easier to teach economic concepts and analysis.
D.
create policy alternatives that are incomplete or subject to criticism.
【单选题】Economists make assumptions to
A.
mimic the methodologies employed by other scientists.
B.
minimize the number of experiments that yield no useful data.
C.
minimize the likelihood that some aspect of the problem at hand is being overlooked.
D.
focus their thinking on the essence of the problem at hand.
【简答题】股票是一种证券持有人对公司的财产有直接支配处理权的证券。 ( )
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