赞题库-背景图

单项选择题

‍“提高资源的产出效率和能源的利用效率”是“3R”原则中哪个原则的实质‍

A．减量化（ReduceR）
B．替代化（Replacement）
C．资源化（Recycling）
D．再利用（euse）

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热门试题

单项选择题QBZ电磁启动器中的真空交流接触器，其触头通过的是( )电，其线圈通过的是()电。

A.交流、直流
B.交流、交流
C.直流、直流

单项选择题When two individuals produce efficiently and then make a mutually beneficial trade based on comparative advantage,

A． a. they both obtain consumption outside their production possibilities frontier.
B． b. they both obtain consumption inside their production possibilities frontier.
C． c. one individual consumes inside her production possibilities frontier, while the other consumes outside hers.
D． d. each individual consumes a point on her own production possibilities frontier.