题目内容

只要所有投票者的偏好都呈双峰形,那么不论他们所须承担的税收份额如何,中间投票者定理均可以成立。()

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经济人从寻利到寻租,主要是他们道德观念的变化。()

受益原则实质上是一个效率原则。()

信息不对称会增加市场的交易成本。()

It is reported _____ great changes have been made with the application of the new policy.

A. which
B. that
C. while
D. what

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