单项选择题

Consumer-Resource system can have two or more stable states. （）

A．对
B．错

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单项选择题

短路电流的热效应可表示为（）

His history of the Reformation, Religion and the Rise of Capitalism, described the origins of the idea that “business is business”, that the economy is a separate compartment that ought to be [填空1] from other spheres.

答案： 1、quarantined