单选题：Questions 22 -25 are based on the following monologue.How di

题目分类：公共英语三级
题目类型：单选题
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题目内容：

Questions 22 -25 are based on the following monologue.
How did the name of "computer virus" come into being? A．It resembles the biological virus.
B．It works the same way as the human virus.
C．It influences the human as the biological viruses do.
D．It spreads to people who use the infected computers.

参考答案：

答案解析：

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分类：公共英语三级题型：单选题

Questions 18 ~ 21 are based on the following dialogue. What

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分类：公共英语三级题型：单选题

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分类：公共英语三级题型：单选题

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分类：公共英语三级题型：单选题

本题的功能是定义图形按钮。窗口中有两个图形按钮，当鼠标移上去时，图形按钮的图形将改变，用鼠标单击按钮时图形按钮的图形又发

本题的功能是定义图形按钮。窗口中有两个图形按钮，当鼠标移上去时，图形按钮的图形将改变，用鼠标单击按钮时图形按钮的图形又发生改变，当鼠标左键松开或者移开鼠标后，图

分类：公共英语三级题型：单选题