问题 选择题

假定2012年某商品价值用人民币表示为1680元,人民币汇率为1美元=7元人民币。如果2013年9月生产该商品的行业劳动生产率提高20%,且人民币对美元升值5%。若其他条件不变,该商品以美元标价应为

A.210.5美元

B.210美元

C.190美元

D.201.6美元

答案

答案:B

题目分析:单位商品的价值量由生产该商品的社会必要劳动时间决定,与社会劳动生产率成反比,2013年生产该商品的社会劳动生产率提高20%时,该商品用人民币标价为1680÷(1+20%)=1400元;人民币对美元升值5%,意味着人民币升值,美元贬值,1美元兑换的人民币会减少,为1美元兑换700/105元人民币,该商品用美元标价为1400÷(700/105)=210美元。故该题选B。

阅读理解

阅读理解。

     Will it matter if you don’t take your breakfast? Recently a test was given in the United States. Those

tests included people of different ages, from 12 to 83. During the experiment, these people were given all

kinds of breakfasts, and sometimes they got no breakfast at all. Special tests were set up to see how well

their bodies worked when they had eaten a certain kind of breakfast. The results show that if a person

eats a proper breakfast, he or she will work with better effect than if he or she has no breakfast. This fact

appears to be especially true if a person works with his brains. If a student eats fruit, eggs, bread and milk before going to school, he will learn more quickly and listen with more attention to class.

     Opposite to what many people believe, if you don't eat breakfast, you will not lose weight. This is

because people become so hungry at noon that they eat too much for lunch, and end up gaining weight

instead of losing. You will probably lose more weight if you reduce your other meals.

1. During the test, those who were tested were given_______.

A. no breakfast at all                  

B. very rich breakfast

C. little food for breakfast              

D. different foods or none

2.The results of the test show that_______.

A. breakfast has great effect on work and studies

B. breakfast has little to do with a person's work

C. a person will work better if he has simple breakfast

D. those working with brains should have much for breakfast

3.The passage mentions that many people believe that if you don't eat breakfast, you will_______.

A. lose weight                    

B. not lose weight

C. be healthier                    

D. gain a lot of weight

4. Which of the following is NOT true according to the passage?

A. Poor breakfasts affect those who work with their brains.

B. Morning diet(节食)may cause one to get fatter.

C. Reducing lunch and supper is of less value in weight-losing.

D. Eating less in lunch and supper may help to lose weight.

5. According to the passage, if a student does not eat breakfast,    _____  .

A. he will fall ill                  

B. he will fail to listen to his teacher

C. he will not make progress in his study

D. his mind will work more slowly

选择题