【单选题】Economists need to develop abstractions in order to:
A.
avoid analyzing real-world economic interactions, which are too complicated to understand.
B.
distinguish normative economic behavior from positive economic behavior.
C.
avoid committing the fallacy of composition.
D.
understand and explain economic behavior.
【单选题】下列关于微循环直捷通路的叙述,哪一项是错误的
【简答题】某企业销售甲产品,单价为100元/件,单位变动成本为50元,固定成本为130000元,要求计算甲产品的边际贡献率、保本销售量及保本销售额。
【简答题】In English the spelling of words does not always represent the sound. So people say /rait/ but spell it right or write, or even rite. Combinations of letters may be pronounced in many ways. And some w...
【单选题】What does the author mean by a “strange blight” and “evil spell”?
A.
The dangerous wild animals
【简答题】如图甲为顶芽,乙为侧芽,请回答下列问题: 不同植物对生长素的敏感度不同,其中双子叶植物()单子叶植物,依据这个原理可把生长素类似物制成()
【简答题】右图甲为顶芽,乙为侧芽,请回答下列问题: 不同植物对生长素的敏感程度不同,其中双子叶植物()单子叶植物,依据这个原理可把生长素类似物制作成()。
【单选题】某企业销售某产品的单价为 50 元,销售量为 100 。已知该产品的平均总成本为 60 元, 平均固定成本为 20 元,则该产品单位贡献利润为()