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【单选题】
下列继承正确的是:A.
父类的所有变量都能被子类继承
B.
父类有的方法，子类不能再定义同名的方法
C.
子类可以继承父类中除了修饰符为private外的所有变量
D.
构造方法也能被继承
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举一反三
【单选题】The Coase theorem suggests that private markets may not beable to solve the problem of externalities
A.
if the government does not become involved in the process.
B.
when the number of interested parties is large and bargaining costs are high.
C.
if the firm in the market is a monopoly.
D.
if some people benefit from the externality.
【单选题】According to the Coase theorem, private parties can solve the problem of externalities if
A.
there are no transaction costs.
B.
each affected party has equal power in the negotiations.
C.
the party affected by the externality has the initial property right to be left alone.
D.
there are a large number of affected parties.
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