【题目】剑桥学派的货币需求函数式为（ ）。

A、<img src="https://cdn.360ckw.com/uploads/images/20220523/1653296224504608.png" title="" alt=""/>

B、<img src="https://cdn.360ckw.com/uploads/images/20220523/1653296277895746.png" title="" alt=""/>

C、<img src="https://cdn.360ckw.com/uploads/images/20220523/1653296293731356.png" title="" alt=""/>

D、<img src="https://cdn.360ckw.com/uploads/images/20220523/1653296310484328.png" title="" alt=""/>