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【单选题】
下列选项中，对数据字典叙述不正确的是( )A.
数据字典的作用是对数据流程图上每个成分的定义和说明
B.
建立数据字典的目的是进行功能分析
C.
数据字典是数据库设计的依据
D.
数据字典属于逻辑模型的一部分
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反馈参考答案：
举一反三
【单选题】When a country both exports and imports a type of commodity, the country is engaged in _______.
A.
inter-industry trade.
B.
an attempt to monopolize the relevant industry.
C.
increasing returns to scale.
D.
intra-industry trade.
【简答题】电加工的工艺参数有_______、工具电极损耗、表面粗糙度和_______四方面.
【单选题】When Country A produces both goods more efficiently than Country B, then
A.
country A should produce both goods and not trade
B.
country A should specialize in its good of least absolute disadvantage
C.
both countries would benefit from autarky.
D.
both countries may not benefit from trade
E.
None of the above
【单选题】When a country allows trade and becomes an importer of a good,
A.
both domestic producers and domestic consumers become better off.
B.
domestic producers become better off, and domestic consumers become worse off.
C.
domestic producers become worse off, and domestic consumers become better off.
D.
both domestic producers and domestic consumers become worse off.
【单选题】When a country both exports and imports a type of commodity, the country is engaged in
A.
intra-industry trade.
B.
increasing returns to scale.
C.
imperfect competition.
D.
inter-industry trade.
E.
an attempt to monopolize the relevant industry.
【单选题】When a country allows trade and becomes an importer of a good,
A.
both domestic producers and domestic consumers are better off.
B.
domestic producers are better off, and domestic consumers are worse off.
C.
domestic producers are worse off, and domestic consumers are better off.
D.
both domestic producers and domestic consumers are worse off.
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