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【多选题】
授予专利权的条件包括( )。A.
新颖性
B.
时间性
C.
实用性
D.
创造性
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皮皮学刷刷变学霸
举一反三
【简答题】( )Hola, buenos días
【单选题】In the Ricardo model,
A.
there is only one factor of production.
B.
international trade is negative-sum game.
C.
differences in factor endowments give rise to international trade.
D.
there is only one industry in each country.
【单选题】In the Ricardo analysis,
A.
If a country has an absolute advantage in a good, it also has a comparative advantage in the good.
B.
If a country has a comparative advantage in a good, it cannot have an absolute advantage in the good.
C.
A country can have a comparative advantage in a good at the same time that it has an absolute advantage in that good.
D.
A country with an absolute advantage in all goods cannot gain from trade.
【多选题】盾构始发阶段,以下( )是洞门处理的质量控制要点
A.
洞口地段加固质量检验
B.
止水条质量及安装的检查
C.
防水封堵、抹面的检查
D.
洞口钢环位置（中线、标高、圆度和平整度）检查
【简答题】¡Hola, Luis! _________________________________________
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