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什么是网络协议，什么是osi参考模型？

答案

参考答案：

为了使计算机之间能正确传输信息，必须有一套关于信息传输顺序、信息格式和信息内容等的约定，这些约定称为网络协议。Osi就是为了实现不同厂商生产的各种不同的计算机系统之间能互相通信而制定的异种机联网的标准框架结构。

判断题

中医治病不是从区别“病”出发，而是着眼于“症”的不同。( )
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单项选择题

Once consumers recognize that a period of inflation has begun, there is generally an increase in consumer spending. This increase can be readily explained by consumers’ desire not to postpone purchases that will surely increase in price. But during protracted periods of inflation, consumers eventually begin to put off making even routine purchases, despite the fact that consumers continue to expect prices to rise and despite the fact that salaries also rise during inflationary periods.
Which one of the following, if true, most helps to explain the apparent inconsistency in consumer behavior described above ？（）

A．During times of inflation consumers save more money than they do in noninflationary periods.

B．There is usually a lag between the leading economic indicators’ first signaling the onset of an inflationary period and consumers’ recognition of its onset.

C．No generalization that describes human behavior will be true of every type of human behavior.

D．If significant numbers of consumers are unable to make purchases, prices will eventually fall but salaries will not be directly affected.

E．Consumers’ purchasing power decreases during periods of protracted inflation since salaries do not keep pace with prices.
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