Which of the followings are correct?
A: Economists have two roles: scientist and policy adviser.
B: As scientists, economists develop and test theories to explain the world around them.
C: Economic policies rarely have effects that their architects did not intend or anticipate.
D: As policy advisers, economists use their theories to help change the world for the better.
A: Economists have two roles: scientist and policy adviser.
B: As scientists, economists develop and test theories to explain the world around them.
C: Economic policies rarely have effects that their architects did not intend or anticipate.
D: As policy advisers, economists use their theories to help change the world for the better.
举一反三
- Economists say that the economic weakness and the stock markets’ wild swings have begun to _______ themselves.
- The economic situation has been worsening, causing economists to _____whether the present policies are sustainable.
- Economists are interested in all the factors that can help to ___ the extent to which a price change will affect supply and demand in the market.
- Economists often evaluate the welfare effects of changes in market structure or of government policies by looking at changes in consumer surplus。（ ）
- Children have a natural ( ) the world around them.