题目内容
The main feature of(72)is that they follow a first-come/first-served rule. For instance, the line of(73)waiting to be run on a computer system.
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(66)is defined as the buying and selling of products and services over the Internet. It had included the handling of purchase(67)and funds transfers over computer networks from its inception.
Whenever new information is entered, it must be stored somewhere in the computer’s(70). RAM only(71)the data temporarily. That is, all information stored in the RAM will disappear if you switch the computer off.
One solution to major security problems is(75), which are frequently installed to fix known security holes.
A(73)is a value that never changes, for example: the value of Pi(approximately 3.14).
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