题目内容

A point inside the production possibilities frontier is ( )

A. efficient, but not feasible.
B. feasible, but not efficient.
C. both efficient and feasible.
D. neither efficient nor feasible.

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All of the following topics fall within the study of microeconomics EXCEPT ( )

A. the impact of cigarette taxes on the smoking behavior of teenagers.
B. the role of Microsoft’s market power in the pricing of software.
C. the effectiveness of antipoverty programs in reducing homelessness.
D. the influence of the government budget deficit on economic growth.

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A point inside the production possibilities frontier is ( )

A. efficient, but not feasible. B. feasible, but not efficient. C. both efficient and feasible. D. neither efficient nor feasible.

All of the following topics fall within the study of microeconomics EXCEPT ( )

当空气漏入凝汽器后,凝汽器内的真空______ 、换热效果______ 。(填:升高、降低、保持不变)

凝汽式汽轮机中间级,流量变化时,级的理想比焓降______ 。(填:增大、减小、不变)

5.某汽轮机全机理想比焓降为1428.6kJ/kg ,各级的理想焓降之和为1514.57kJ/kg ,则该汽轮机的重热系数为______ 。（保留两位小数）

A. efficient, but not feasible.
B. feasible, but not efficient.
C. both efficient and feasible.
D. neither efficient nor feasible.

当空气漏入凝汽器后,凝汽器内的真空、换热效果。(填:升高、降低、保持不变)