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4. John is our hardware engineer and he'll have your computer (fix) ___________.

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5. We (excite) ______________ about Industry 4.0 because it represents the next great step forward for businesses.

多个单片机系统协调工作,要求同步性要求较高时,采用____时钟方式。

STC89C52单片机复位时,必须使RST引脚加上持续2个机器周期的____电平。

MCS-51单片机复位后,SP的值为____H。

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