题目内容

由于性能的限制,防火墙通常不能提供实时的入侵检测

A. 对
B. 错

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计算机软件系统可分为应用系统和操作系统两大类

A. 对
B. 错

声音的数字化技术是把声音转换成模拟信号

A. 对
B. 错

Fill the blanks with the words of this unit and pay attention to the correct forms (first letter of words are given):Employers must consider all candidates impartially and without b_______.

Make a rough s________ before you draw.

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