【判断题】【消耗次数：1】
周期单位脉冲序列的频谱是非周期的。（）
①
正确
②
错误
参考答案：
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总线周期≥指令周期≥时钟周期
②
时钟周期≥指令周期≥总线周期
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指令周期≥总线周期≥时钟周期
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时钟周期≥总线周期≥指令周期
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心动周期是指心脏机械活动的周期
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心动周期是指心肌电活动周期
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心房和心室每收缩与舒张一次为一个心动周期
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当心率为75次/分，每个心动周期历时0.85秒
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