问题 问答题 简答题

设想你与一个吸烟者同住一间房,但你不吸烟。根据科斯定理,什么因素决定了你的室友是否在房间里吸烟?这个结果有效率吗?你和你室友如何达成这种解决方法?

答案

参考答案:

根据科斯定理,如果我被迫吸烟所承受的成本大于我的室友吸烟所获得的收益,我的室友就不应该在房间里吸烟。如果我的成本小于室友的收益,她就可以在房间里吸烟。

我可以通过对她进行吸烟有害的教育,同时给她买一些糖果以缓解她不能吸烟的痛苦,来与她达成协议——她以后不在房间里吸烟。

阅读理解

阅读理解。

     In many countries the standard of living enjoyed by their people has increased rapidly in recent years.

Sadly, not everyone in these countries is so fortunate and many people in rich countries are homeless.

     The reasons for homelessness are various, but poverty (贫穷) is undoubtedly one of the main causes.

The homeless people may have become jobless and then been unable to pay their rent and so no longer

have a roof over their heads. Often, the fact that unemployed people get help from the government prevents

this from happening, but not always.

     Some homeless people are mentally ill and have no one to look after them. Some are young people who,

for one reason or another, have left home and have nowhere to live. Many of them have had a serious

disagreement with their parents and have left home, choosing to go to a city and live on the streets. Sometimes

they have taken such action because they have been unable to get on with a step-parent.

     Many homeless people get into the habit of begging to get enough money to stay alive, but many of the

general public refuse to give anything to beggars. Often they are moved on by the police, being accused (指

控), whether rightly or wrongly, of forceful begging. There are many who disrespect homeless people.

     Some cynics (愤世嫉俗的人) declare that homeless people choose to live the life which they lead. But

who would willingly choose to live in z shop doorway, under a bridge or in a cardboard box?

1. According to the text, what causes some people to be homeless?

A. Lack of money.

B. The increased standard of living.

C. No government help.

D. Agreement with their parents.

2. It can be inferred from the text that _____.

A. the homeless are willing to live under a bridge or in a cardboard box

B. you will not find homeless people in countries with a high standard of living

C. the mentally ill live on the stress because they want the company of other homeless people

D. the unemployed who receive help may still be among the homeless

3. In paragraph 2, "a roof over their needs" most probably means _____.

A. a cap

B. a car

C. a home

D. a covering

4. The author thinks that the homeless people are _____.

A. pitiful

B. troublesome

C. respectable

D. admirable

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