题目

某花店将进货价为20元/盒的百合花，在市场参考价28~38元的范围内定价36元/盒销售，这样平均每天可售出40盒，经过市场调查发现，在进货价不变的情况下，若每盒下调1元，则平均每天可多销售10盒，要使每天的利润达到750元，应将每盒百合花在售价上下调多少元？ 答案：【答案】应下调1元.【解析】试题分析: 设应将售价下调x元，利用每一盒的利润×销售的数量＝获得的利润列出方程解答即可．试题解析:设应将售价下调x元，则： 因为36-11=25＜28舍去,所以应下调1元.阅读理解。                         Different Customs and Cultures     If an American is satisfied with you, he will put his thumb and forefinger into a circle. That means OK. But in Brazil, the very sign is considered to be rude. In Poland, a guest usually presents flowers to his hostess. The number must be an odd (奇数) one. Besides, the hostess isn't  expected to remove the cover of the bunch of flowers. And usually, red rose is a sign of love.     Usually we nod to express our agreement and shake our heads to show disapproval. To our surprise these body movements mean the opposite in Bulgaria(保加利亚).     The differences in customs and cultures in the world are really noticeable. We should learn more about them to avoid embarrassment(窘迫). Then, would you please remember: When in Rome, do as the Romans do.1. In Poland, if a man gives some odd red roses to a woman as a present, it means that he     .       A. will invite her to a dinner partyB. has not been in love with herC. will invite her to a ballD. has fallen in love with her2. If a Brazilian puts his thumb and index(食指)into a circle, it shows that he        you.A. will be friends withB. is not satisfied withC. is willing to helpD. is satisfied with3. In Poland, it is            for the hostess to remove the cover of the bunch of flowers somebody presented to her.A. impolite                       B. politeC. expected                       D. great      4. In Bulgaria, if a man nods, it means that he           with you.A. will have a talk                  B. disagreesC. will shake hands                 D. agrees5. The sentence "When in Rome, do as the Romans do. " means that           .A. we should learn from the RomansB. we should work as the Romans doC. we should obey its customs when we are entering a countryD. we have been Romans