【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.
【判断题】The production possibilities frontier is bowed outward because the trade-offs between the production of any two goods are constant.
【单选题】关于心内电生理检查的描述,正确的是
B.
心内电生理检查时,电极导管只需放置到希氏束区和右心室心尖部
C.
依据电生理检查结果,可以指导对患者进行药物还是非药物治疗
E.
电生理检查的操作者只需熟悉心电图学知识,操作前不需培训
【单选题】The bowed production possibilities curve represents:
A.
constant opportunity costs.
B.
decreasing opportunity costs.
C.
increasing opportunity costs.
【判断题】在素材文件的背景上新建一个图层,设置混合模式为“柔光”及合适的不透明度,可以绘制出腮红效果。
【单选题】来文与复文可为一件,这是一种比较特殊的一种规定。“来文与复文”,是对联系密切的来往性质的文件材料的概括性表达,也包括“去文与复文”,从文种上看包括
【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.