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问题 单项选择题

2009年度甲产品单位变动成本(包括销售税金)为2700元，边际贡献率为40%，固定成本总额为5625060元，全年实现净利润为20100000元。该公司适用的所得税税率为25%。
要求：

公司2009年度的单价为( )元。

A．2700

B．3600

C．4500

D．5200

答案

参考答案：C

解析： 因为：单位变动成本÷单价=变动成本率，2700÷单价=1-40%

单项选择题

SQL除了具有数据查询的功能外，还有______功能。

A．数据定义

B．数据操纵

C．数据控制

D．以上答案均正确
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单项选择题

Many people are surprised when they find the Internet(因特网)was set up in the 1960s. At that time, computers were large and expensive. Computer networks(网络) didn’t work well. If one computer in the network broke down, then the whole network stopped. So a new network system (系统) had to be set up. It should be good enough to be used by many different computers. If a part of the network was not working, information could be sent through another part. In this way computer network system would keep on working all the time.
At first the Internet was only used by the government, but in the early 1970s,universities(大学) ,hospitals and banks were allowed(允许) to use it too. However, computers were still very expensive and the Internet was difficult to use. By the start of the 1990s, computers became cheaper and easier to use.
Today it is easy to get on-line(上网) and it is said that millions of people use the Internet every day. Sending e-mail is more and more popular among students.
The Internet has now become one of the most important parts of people’s life.

The word" information" may probably mean

A. letter


B. message

C. number
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