問題詳情

22. Which of the following goods is rival and excludable?

(A)an uncongested toll road

(B)an uncongested nontoll road

(C)a congested nontoll road
(D)a congested toll road

參考答案

答案:99

統計:A:0,B:0,C:0,D:0,E:0

難度:計算中