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1、eaintheaccidentinvestigation,managementandreporting,eachpostshouldbedevelopedunderthissystemspecialistscheck,cleartheexaminations,time,cyclesandotherrelevantregulations.Strengtheningsitesupervisionandexamination,todetectandinvestigateillegalcommand,illegaloperationsandv
2、iolationsofoperatingrules.Secondsafetyreferstotheproductionsite,technologymanagement,equipment,facilities,andsooncanleadtoaccidentsrisksexist.1,accordingtotheextentofthesecurityrisks,solvingisdividedintoa,b,andclevelsofdifficulty;A-level:difficult,miningdifficulties,sha
3、llbereportedtothecompany'sproblems.B-class:difficulttoresolvedif多功能数字钟设计说明：1．系统顶层框图：各模块电路功能如下：1.秒计数器、分计数器、时计数器组成最基本的数字钟，其计数输出送7段译码电路由数码管显示。2.基准频率分频器可分频出标准的1HZ频率信号，用于秒计数的时钟信号；分频出4HZ频率信号，用于校时、校分的快速递增信号；分频出64HZ频率信号，用于对按动“校时”，“校分”按键的消除抖动。2.多功能数字钟结构框图：一、系统功能概述已完成功能1.完成时／分／秒的
4、依次显示并正确计数，利用六位数码管显示；2.时／分／秒各段个位满10正确进位，秒／分能做到满60向前进位，有系统时间清零功能；3.定时器：实现整点报时，通过扬声器发出高低报时声音；4.时间设置，也就是手动调时功能：当认为时钟不准确时，可以分别对分／时钟进行调整；听范读短文的录音。学生根据拼音自由朗读短文，不会拼读的音节求助同学或老师。听老师读短文，把自己不会认读的字和词听清楚。指名朗读，重点纠正“蓝”“绿”“帆”的读音。齐读短文，进一步熟悉短文。你最喜欢哪一句话？指导学生有感情地朗读。ficulties,shallconsistofm
5、iningorganizationstosolveproblems.C-class:fromsegmentsandbusinessrisksthatmustbeaddressedintheDepartment.2,open-pitmineunsafetypesinclude:electrical,transport,blasting,fire,andotherslope.3,accordingtotheseverityofthehazardfilledinbyunittroubleshooting,registrationform(s
6、eeatteaintheaccidentinvestigation,managementandreporting,eachpostshouldbedevelopedunderthissystemspecialistscheck,cleartheexaminations,time,cyclesandotherrelevantregulations.Strengtheningsitesupervisionandexamination,todetectandinvestigateillegalcommand,illegaloperation
7、sandviolationsofoperatingrules.Secondsafetyreferstotheproductionsite,technologymanagement,equipment,facilities,andsooncanleadtoaccidentsrisksexist.1,accordingtotheextentofthesecurityrisks,solvingisdividedintoa,b,andclevelsofdifficulty;A-level:difficult,miningdifficultie
8、s,shallbereportedtothecompany'sproblems.B-class:difficulttoresolvedif1.闹钟：实现分/时闹钟设置，在时钟到达设定时间时通过扬声器响铃。有静音模式。待改
