问题 解答题

某市场将进货价为40元/件的商品按60元/件售出,每星期可卖出300件。市场调查反映:如调整价格,每涨价1元/件,每星期该商品要少卖出10件。

(1)请写出该商场每月卖出该商品所获得的利润y(元)与该商品每件涨价x(元)间的函数关系式;

(2)每月该商场销售该种商品获利能否达到6300元?请说明理由;

(3)请分析并回答每件售价在什么范围内,该商场获得的月利润不低于6160元?

答案

(1)

(2)每月该商场销售该种商品获利不能达到6300元,理由如下:

        ∵

                

        当x=5时,y取最大值为6250元,小于6300元 ∴不能达到

(3)依题意有:

                            

                                    ∴

                                     ∴

                                     ∴①或②

                                     解①得: 

                                     解②得:,无解。

       ∴当售价不低于62元且不高于68元时,商场获得的月利润不低于6160元。

阅读理解

Researchers found that walking around with a forced smile and fake (假的) happiness simply leads to people feeling unhappier. So, putting a brave face on your sadness could be harmful. The research also found that women suffered more than men when pretending to be happy.

Dr. Brent Scott, who led the study, said employers should take note because forcing workers to smile when dealing with the public can result in bad outcomes. He said, “Smiling for the sake of smiling can lead to emotional tiredness, and that’s bad for the organization.” He also said the research showed customer-service workers who had “fake smiles” throughout the day fell into a bad mood and didn’t want to work, so their productivity dropped.

The study is one of the first of its kind to examine emotional expressions over a period of time and compare the different effects on men and women. Dr. Scott’s team examined the effects of “surface acting”, or fake smiling, compared to “deep acting”, or making people smile by thinking of peasant memories.

Dr. Scott said, “Women were harmed more by surface acting, meaning their moods worsened even more than men’s. However, they were helped more by deep acting, which means their moods improved more by thinking of pleasant memories. ”

According to Dr. Scott, women tend to suffer more when pretending to be happy because they are expected to be more emotionally expressive than men. Therefore, forcing a smile while feeling down is more likely to go against their normal behavior and cause more harmful feelings.

Although deep acting can improve moods a little in the short term, Dr. Scott says, it’s not a long-term solution to feeling unhappy. “There have been some suggestions that if you do this over a long period you start to feel unreal. You’re trying to develop positive emotions, but at the end of the day you may not feel like yourself any more.”

小题1:According to the passage, Dr. Scott’s study ______.

A.is supported by some big employers in the USA

B.is meaningful as there haven’t been many similar ones

C.examined more women than men for a long time

D.aimed to make the employees more productive小题2:Women suffer more from fake happiness mainly because ______.

A.they usually turn up shy in public places

B.they should be more emotionally expressive

C.they are often treated in a terrible way

D.they like thinking of pleasant memories小题3:It is implied in the passage that deep acting _____.

A.doesn’t have any effect on men

B.cannot improve our moods in any case

C.harms our feelings in the long run

D.pleases people by feeling like another person小题4:What is the best title for the passage?

A.Fake smiling makes people unhappy.

B.Women shouldn’t be forced to smile.

C.An important suggestion for workers.

D.Why people don’t want to work.

单项选择题