题目内容

Why is reading so difficult for Bradley?

A. Because it is difficult for him to focus on reading.
Because he doesn't like reading at all.

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What is Bradley for by working extra hard in books?

A. For acquiring knowledge from books.
B. For getting high marks in the exam.

What is Bradley's attitude towards Thomas?

A. Bradley believes Thomas can do well in reading.
Bradley thinks Thomas shouldn't hate books.

“搭便车”现象是对下面哪个问题的一种形象的描述？（）

A. 社会福利问题
B. 公共选择问题
C. 公共产品问题
D. 垄断

解决外部不经济可采取（）。

A. 征税的方法
B. 通过产权界定的方法
C. 通过将外部性内在化的方法
D. 补贴