问题 单项选择题

消费者效用最大化的均衡条件是( )。

A.商品边际替代率等于商品价格之比
B.商品边际替代率大于商品价格之比
C.商品边际替代率小于商品价格与收入之比
D.商品边际替代率等于商品价格与收入之比

答案

参考答案:A

解析: 无差异曲线与预算线的切点处的商品组合既是消费者用现有收入可以买到的,又能给消费者带来最高程度的满足。可见,满足效用最大化的商品组合必定位于预算线与无差异曲线相切的切点上。在切点处,无差异曲线的斜率恰好等于预算线的斜率。而无差异曲线的斜率的绝对值等于两种商品的边际替代率,预算线的斜率的绝对值等于两种商品的价格之比,因此,消费者效用最大化的均衡条件是商品边际替代率等于商品价格之比。
[错因分析] 对消费者效用最大化的概念的掌握不牢。

阅读理解

阅读理解。

     Everyone needs friends. Friends bring us happiness and hope in our lives. But the ability to make friends

changes from person to person. To some people, making friends is easy, and to others it's very difficult.

     Making friends is a skill, and the first thing is to know how to get along with others.

     If you have trouble in making friends, maybe I can tell you how to do it.

     ★Realize your own good points. You have skills and talents that others will like.

     ★Believe that you are a good person and have something nice to share with others.

     ★Be humorous. Learn to laugh at yourself and your weakness. Remember to smile to others.

     ★Respect the others. Everyone has his own idea. Learn how to listen to others' ideas without trying to

make them accept yours.

     ★Be kind. If you are kind to others, they will usually be kind to you. There are hundreds of little things

you can do to show kindness. Open the door for someone. Wave to a friend and so on.

     ★Don't complain. Learn to accept what you can't change, and work hard to change what you can. No

one is willing to hear your complaining all the time.

     ★Never give up. Even if you are faced with some closed-minded people, never give up. And try to find

someone who will understand you.

1. Why do we need friends according to the passage?

A. Friends can do everything for us.

B. Friends can bring us happiness.

C. Friends accept our ideas all the time.

D. Without friends we could not live. 

2. What's the first thing we should learn in order to make friends?

A. To help others.

B. To smile to others.

C. To get along with others.

D. To listen to others' complaints.

3. Which of the following shows a sense of humour?

A. Opening the door for someone.

B. Complaining to others all the time.

C. Laughing at ourselves and our weakness.

D. Finding someone who will understand us.

4. How many pieces of advice does the writer offer when we have trouble in making friends?

A. Five.

B. Seven.

C. Nine.

D. Eleven.

选择题