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【简答题】
图中,JL-3立管,一层支管标高为()m,管径由()变为(),变径点在第3个大便器()处,DN15的标高由()m变为()m。
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举一反三
【单选题】The bowed shape of the production possibilities frontier can be explained by the fact that
A.
all resources are scarce.
B.
economic growth is always occurring.
C.
the opportunity cost of one good in terms of the other depends on how much of each good the economy is producing.
D.
the only way to get more of one good is to get less of the other.
【单选题】The difference between production possibilities frontiers that are bowed out and those that are linear is that
A.
bowed out production possibilities frontiers illustrate tradeoffs where linear production possibilities frontiers do not.
B.
bowed out production possibilities frontiers show increasing opportunity cost where linear ones show constant opportunity cost.
C.
bowed out production possibilities frontiers are the result of perfectly shiftable resources where linear production possibilities frontiers are not.
D.
linear production possibilities frontiers illustrate real world conditions more than bowed out production possibilities frontiers.
【判断题】The production possibilities frontier is bowed outward because the trade-offs between the production of any two goods are constant.
A.
正确
B.
错误
【单选题】The concavity (bowed-out shape) of the production possibilities curve is the result of:
A.
the law of demand.
B.
the law of supply.
C.
the law of increasing opportunity cost.
D.
complementarily in consumption.
【单选题】The bowed shape of the per-worker production function is caused by
A.
wealth effects that reduce labor supply.
B.
diminishing marginal productivity of capital.
C.
increasing marginal productivity of labor.
D.
increasing marginal productivity of capital.
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