问题 多项选择题

对无差异曲线表述正确的有()

A.无差异曲线某一点的边际替代率就是该点切线斜率的绝对值

B.无差异曲线从左向右下倾斜

C.无差异曲线凹向原点

D.任意两条无差异曲线都不能相交

E.离原点越近的无差异曲线,消费者的偏好程度越低

答案

参考答案:A, B, D, E

解析:

 无差异曲线的特点有:无差异曲线某一点的边际替代率就是该点切线斜率的绝对值;无差异曲线从左向右倾斜;任意两条无差异曲线都不能相交;离原点越近的无差异曲线,消费者的偏好程度越低。所以,本题选ABDE。

阅读理解

Robot Green was 31years old when he went to college. That was his first time he came into the classroom. Eleven years later he received a doctor’s degree in physics. Robert Green was a good example in studies for all people. His life was a moving story.

From a young age, Robert Green lived a simple and poor life with his grandfather in the mountains of Boston. His grandfather taught him to read. Later he taught himself to read Maths books and Physics books. From time to time, he bought old books with his saved money and read them all. At that time few people in Robert’s neighbourhood knew about his love of reading and learning. But one person, Jane Keller did know him. She worked in a library. Robert used to go there and he read everything in it. She suggested books for him to read.

A year later, he entered Bethel College. He was interested in everything that he had never seen before. He got an A in every subject. To his teachers’ surprise, he finished college in three years. His teachers encouraged him greatly and he went on his education at Stanford University.

小题1:What did Robert buy with his saved money at his young age?

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小题2:Where did Jane Keller work?

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小题3:How did Robert get on with his every subject in Bethel College?

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小题4:Why were Robert’s teachers surprised at him?

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小题5:What do you think of Robert Green?

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选择题