题目内容
The three basic types of digital logic gates are the AND gate, the OR gate, and the NOT gate.
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An important function of NOT gate is to produce signal inversion or an input signal that is opposite in nature to the output signal.
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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