问题 多项选择题

在其他条件不变的情况下,需求价格弹性和总销售收入的关系,下列说法正确的是()。

A.需求价格弹性系数大于1,产品价格降低时,会使生产者的销售收入增加

B.需求价格弹性系数小于1,产品价格提高时,会使生产者的销售收入减少

C.需求价格弹性系数等于1,产品价格提高时,不会影响生产者的销售收入

D.需求价格弹性系数小于1,产品价格提高时,会使生产者的销售收入增加

E.需求价格弹性系数大于1,产品价格提高时,会使生产者的销售收入增加

答案

参考答案:A, C, D

解析:如果需求价格弹性系数小于1,说明需求对价格不够敏感,需求的下降幅度小于价格的上升幅度,因此会导致销售收入增加;如果需求价格弹性系数大于1,说明需求对价格敏感,需求的下降幅度大于价格的上升幅度,因此会使销售收入减少;如果需求价格弹性系数等于1,那么价格变动不会引起销售收入变动。

阅读理解

When early colonial settlers went to America, they took many forms of dance to their new home. Square dancing, one of the oldest forms of American folk dancing, developed from several different Old World group dances, mainly English country dances, and the French quadrille(四对方舞).

In the American version of square dancing, four couples form a square and dance to music. An American addition to square dancing is the caller. What do you think a caller does?

The callers---someone who calls out the dance steps in time to the music--- was a completely American invention. At first dancers memorized all the steps for a particular dance, but eventually the dances became so complicated that it was necessary to have someone call out cues (提示) so that dancers didn’t have to remember so many steps. The caller didn’t just call out “do-se-do your partner”; a good caller also came up with colourful sayings or witty lines that he said in between the cues such as “Don’t be shy and don’t be afraid. Swing on the corner in a waltz promenade (步伐).” A caller might also come up with new dance steps and routines.

Although popular for years, square dancing seemed to be going out of style and fading away until the early 1930s, when Henry Ford helped revive interest in it. Ford, the automobile manufacturer, used to vacation at the Wayside Inn in Massachusetts, where he enjoyed the dance programme run by a man named Benjamin Lovett. Ford asked Lovett to come to Detroit and teach dances, but Lovett said he couldn’t because he had a contract with the inn. Ford solved that problem by buying the inn and Lovett’s contract. He took Lovett back to Detroit, where together they established a programme for teaching squares and rounds. Square dancing was updated and groups began forming all over the country.

53. What is the best title for the passage?

A. The Different Steps of Square Dancing

B. The Origin and Development of Square Dancing

C. Who Was the Inventor of Square Dancing?

D. Why Did Square Dancing Go Out of Style?

54. What does the underlined part “their new home” refer to?

A. The United Kingdom.           B. France.

C. Africa.                         D. America.

55. Why did the caller call out the steps for the dancers?

A. Because the dance was invented by the caller.

B. Because the dancers didn’t know the names of the steps.

C. Because the steps were very particular.

D. Because it was hard for the dancers to remember all the steps.

56. Why did the author mention Henry Ford in the last paragraph?

A. Because he was the man who made the first car.

B. Because he was vey fond of dancing.

C. Because he helped make square dancing popular again.

D. Because he taught people how to dance.

单项选择题