問題詳情

5.Public goods are
(A)rival and excludable.
(B)rival but excludable.
(C)nonrival but excludable.
(D)nonrival and nonexcludable.

參考答案

答案：[無官方正解]
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)