题目内容
An important function of NOT gate is to produce signal inversion or an input signal that is opposite in nature to the output signal.
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The three basic types of digital logic gates and the flip-flop are the four circuits most commonly employed in such systems.
Even in a large scale digital system, such as a computer, control, or digital-communication system, there are a lot of basic operations, which must be performed.
一般来说，数字化声音的质量越高，则要求（）
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