电子商务系统、企业管理信息系统等属于______。 A．网络应用系统 B．数据库管理

¹³¹I在甲状腺内的有效半衰期一般为（）。

A.2天

B.3.5～4.5天

C.4.5～5.5天

D.5.5～6.5天

E.8天

下列关于国际资本流动的说法正确的是( )。

A．国际资本流动的主体只能是国家或者国际组织

B．我国对国际资本流动采用的分类方法是以期限划分为基础，综合考虑其他方法

C．投机性资本是指利用利率差别和(或)预期汇率变动来牟利的资本

D．投资资本属于短期资本

阅读理解

     Almost every day we come across situations in which we have to make decisions one way or another. Choice ,we are given to believe, is a right. But for a good many people in the world,in rich and poor

countries, choice is a luxury , something wonderful but hard to get, not a right. And for those who think

th ey are exercising their right to make choices , the whole  system  is merely an illusion , a false idea

created by companies and advertisers hoping to sell their products.

     The endless choice gives birth to anxiety in people's lives. Buying something as basic as a coffee pot

is not exactly simple. Easy access to a wide range of everyday goods leads to a sense of powerlessness

in many people, ending in the shopper giving up and walking away, or just  buying  an  unsuitable  item

(商品) that is not really wanted. Recent studies in England have shown that many electrical goods bought

in almost every family are not really needed. More difficult decision-making is then either avoided or

trusted into the hands of the professionals ,lifestyle instructors , or advisors.

      It is not just the availability of the goods that is the problem, but the speed with which new types of

products come on the market. Advances in design and production help quicken the process. Products

also need to have a short lifespan so that the public can be persuaded to replace them within a short time. The typical example is computers , which are almost out-of-date once they are bought. This indeed makes selection a problem. Gone are the days when one could just walk with ease into a shop and buy one thing:  no choice, no anxiety.

1. What does the author try to argue in Paragraph l?     

A. The exercise of rights is a luxury.

B. The practice of choice is difficult.

C. The right of choice is given but at a price.

D. Choice and right exist at the same time.

2. Why do more choices of goods give rise to anxiety?     

A. Professionals find it hard to decide on a suitable product.

B. People are likely to find themselves overcome by business persuasion.

C. Shoppers may find themselves lost in the broad range of items.

D. Companies and advertisers are often misleading about the range of choice.

3. By using computers as an example, the author wants to prove that___________.  

A. advanced products meet the needs of people

B. products of the latest design flood the market

C. competitions are fierce in high-tech industry

D. everyday goods need to be replaced often

4. What is this passage mainly about?  

A. The variety of choices in modern society.

B. The opinions on people's right in different countries.

C. The problems about the availability of everyday goods.

D. The helplessness in purchasing decisions.

预留金是指( )为可能发生的工程量变更而预留的金额。

A．招标人

B．投标人

C．施工单位

D．建设单位

袋式过滤器属于（）方式的一种装置。

A.内部过滤

B.表面过滤

C.惯性除尘

D.强制除尘