戊二醛有效浓度应保证不低于多大浓度，若低于此浓度杀菌效果将会明显降低（） A.2.0

As societies develop,their members start to see things not so much according to what they need,but according to what they want.When people have enough money,these wants become demands.

Now,it’s important for the managers in a company to understand what their customers want if they are going to develop effective marketing strategies(策略).There are various ways of doing this.One way at supermarkets(超市),for example,is to interview(采访)customers while they’re doing their shopping.They can be asked what they prefer to buy and then the results of the research can be studied.This provides information on which to base future marketing strategies.It’s also quite normal for top managers from department stores to spend a day or two each month visiting stores and mixing freely with the public,as if they were ordinary customers,to get an idea of how customers act.

Another way to get information from customers is to give them something.For example,some fast food restaurants give away tickets in magazines or on the street that permit customers to get part of their meal for nothing.As well as being a good way of attracting customers into the restaurants to spend their money,it also allows the managers to get a feel for where to attract customers and which age-groups to attract.

Another strategy used at some well-known parks such as Disneyland is for top managers to spend at least one day in their work,touring the park dressed as Mickey Mouse or something like that.This provides them with a perfect chance to examine the scene and watch the customers without being noticed.

小题1:The text is designed for ________.

A．managers

B．salesmen

C．researchers

D．customers小题2:Which of the following can help managers get useful information?

A．Visiting customers themselves.

B．Giving customers free food on the street.

C．Visiting parks as ordinary customers.

D．Asking customers questions at supermarkets.小题3:What does the word“this”underlined in the last sentence refer to?

A．Visiting Disneyland.

B．Wearing attractive clothes.

C．Acting Mickey Mouse.

D．Dressing up and walking around.小题4:The main idea of the text is ________.

A．how to do market research

B．how to develop marketing strategies

C．how to find out customers’ social needs

D．how to encourage customers to spend more money

如图所示，它是某个四冲程内燃机在工作过程中的一个冲程，由图中情况，可判定这个冲程

A. 是排气冲程

B. 是做功冲程

C. 正在把机械能转化为内能

D.不是依靠飞轮的惯性完成

会计凭证按管理方式分为（）。

A、个人用户凭证和单位用户凭证

B、基本凭证和特定凭证

C、空白重要凭证和一般凭证

D、自用凭证和对外出售的凭证

物体的辐射通量密度与哪些因素有关？常温下黑体的辐射峰值波长是多少？

什么叫线性电阻和非线性电阻？