题目内容

公共产品区别于准公共产品的主要标准是（）。

A. 是否同时具备非排他性
B. 一定程度上的非竞争性和非排他性
C. 一定程度上的非排他性或非竞争性
D.是否同时具备竞争性

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A. Between half an hour to two hours.
B. More than on hour.
C. Less than thirty minutes.
D. Between half an hour and an hour.

A. Every day.
B. Every day. Four or finve times a month.
C. Four or five times a week.
D. Only on weekends.

Along the river.
B. On the right side of the road.
C. In a nice park.
D. In a gym.

A. By car.
By train.
C. By walking.
D. By jogging.