1. 万用表判断lm337的好坏
常规的LM7808和LM7908（负极性的），网购也就1块左右。LM317或LM337通过改变取样电阻，可以取得2-25V间的任意电压。
2. 万用表判断lm337的好坏的方法
正常情况下输出电压都是可调的，会不会是匹配电阻不对？或者线路有问题
3. 万用表检测lm3886好坏
LM3886峰值输出电流是7A，对于2欧姆负载而言，并联方案可以实现双28V供电，再高就不保险了；而对于16欧姆负载，单片即使双42V供电，也只有不到2.5A的峰值电流，此时采用BTL方案可以达到5A输出电流，最大限度利用其电流输出容量。至于供电制约，就是说如果供电电压偏低，又想得到大功率输出，就应该采用BTL方案；如果供电电压不是问题，希望降低总噪声和失真，并联就是优先选择。
4. 万用表判断tl431好坏
TL431的性能好坏，可用万用表R×1kΩ档测量，方法是：红表笔接阳极A，黑表笔接阴极K，阻值应为无穷大∞，对调表笔测量应在几千欧姆；红表笔接参考极R，黑表笔接阴极K，阻值应为无穷大∞，对调表笔测量应在几千欧姆；红表笔接参考极R，黑表笔接阳极A，阻值应为30K左右，对调表笔测量应为20K左右。若测量某两脚之间阻值很小或为零，表明管子已击穿损坏。TL431损坏后，如无同型号的进行更换，可用KA431、μA431、LM431、YL431、S431、等直接代换.
5. lm339n好坏判断数字表
LM339坏是电磁炉不加热的一种常见故障。测量LM339的办法是：用指针万用表RX1K挡红表笔接12脚也就是接地黑表笔除接第3脚有较小的阻值（5K左右）外接任意一脚电阻将接近无穷大，若其他脚也有较小的阻值则为坏件。LM399是高精度电压基准源，电磁炉用的应该是四电压比较器LM339。集成电路LM339内部装有四个独立的电压比较器，很常见的集成电路。利用LM339可以方便的组成各种电压比较器电路和振荡器电路。用在电磁炉中，主要是作为锅具检测、温度检测、电压、电流检测。将检测到的信号返给主芯片，使其指挥正常工作、调整功率等。
6. 万用表怎样测量lm338好坏
改变一下那个调整电阻，人为让空载电压高0.13，负载后就满足你要求了。
7. 万用表判断lm337的好坏视频
电脑不仅能帮助我们快速完成重复性的工作，而且提供了一种休闲娱乐的方式。学电脑能够快速入门是每个新手梦寐以求的事情，但是不是每个人都能快速入门的。但是如果定制好合理计划，循序渐进，就会收到非常好的效果。
电脑的组成
一个完整的电脑由软件和硬件组成。硬件主要包括我们常见的鼠标，键盘，显示器，主机和各种储存介质，电脑的硬件如同人的躯干和四肢；而软件如同人的大脑和神经系统，软件在硬件的基础上才能工作。
基础入门
启动电脑
电脑启动就是我们常说的“开机”，也是启动操作系统的过程。开机具有一定的顺序：
1、打开显示器
2、打开主机
3、开机自检
4、启动成功
通过上述步骤启动电脑，叫做冷启动，是常规的开机步骤。此外，在特殊情况下，我们还可以通过下面两种方式启动电脑。
热启动：是指电脑处于开机的状态下，通过【开始】菜单中的【重新启动|】命令对电脑进行重新启动。
复位启动：当电脑在运行过程中出现异常而不能运行，且采用热启动失效时，可以采用复位启动方式重启电脑，方法是按下主机箱上的【复位】按钮即可。
关闭电脑
使用完电脑后，需要将其关闭。电脑的关机顺序与开机顺序正好相反。即先关主机电源，然后逐一关闭外部设备的电源。遵循正确的开关机顺序可延长电脑的使用寿命。
正确的关机方法为：在系统桌面上单击【开始】按钮，在弹出的【开始】菜单中单击【关机】按钮，电脑将停止所有程序并退出操作系统，接着系统将自动断开主机电源，然后再依次关闭显示器、音箱等外接设备即可。
如何使用键盘
键盘是用于操作计算机设备运行的一种指令和数据输入装置，也指经过系统安排操作一台机器或设备的一组功能键（如打字机、电脑键盘）。
电脑键盘由功能键区、主键区、编辑键区，数字键区和小键盘区5个区组成。其中常用操作打字是在主键区完成的。
键盘是最常用也是最主要的输入设备，通过键盘可以将英文字母、汉字、数字、标点符号等输入到计算机中，从而向计算机发出命令、输入数据等。
如何使用鼠标
鼠标，是计算机的一种外接输入设备，也是计算机显示系统纵横坐标定位的指示器，因形似老鼠而得名（港台作滑鼠）。其标准的称呼应该是“鼠标器”，英文名“Mouse”。鼠标的使用是为了使计算机的操作更加简便快捷，来代替键盘那繁琐的指令。
一般的鼠标上有左键，右键和滑轮三个部分。
计算机的储存介质
计算机的储存介质有：硬盘、U盘、光盘和软盘等。
硬盘
电脑硬盘是计算机最主要的存储设备，硬盘一般分为固态硬盘（SSD）和机械硬盘（HDD）两种。固态硬盘读写速度更快，但存储容量较小，机械硬盘存储容量较大但同容量大小，固态硬盘价格也更昂贵。
U盘
U盘是USB(USB flash disk)盘的简称，据谐音也称“优盘”。U盘是闪存的一种，故有时也称作闪盘。U盘与硬盘的最大不同是，它不需物理驱动器，即插即用，且其存储容量远超过软盘，极便于携带。
软件操作
电脑软件（Computer Software）是指计算机系统中的程序及其文档。一般来讲软件被划分为系统软件、应用软件，系统软件为计算机使用提供最基本的功能，可分为操作系统和支撑软件，其中操作系统是最基本的软件，常见的操作系统包括为微软的Windows系统。
软件的基础操作
软件的使用包括软件的下载、安装和卸载：
软件的下载
1、浏览器下载
2、软件官网下载
3、电脑管家或360软件管家等下载软件（下图为360软件管家）
软件安装
第一种就是你下载下来的是.exe文件的应用程序，这种程序一般都是安装包，就是你双击之后，会进入安装界面；第二种就是不需要安装的，你下载下来的是一个压缩文件，你只需要解压就可以使用。
电脑软件安装过程中特别要逐一择安装设置（安装盘位）的选择、流氓软件选项勾选等。
软件的卸载
控制面板—程序和功能—找到要卸载的软件—右击卸载
软件的启动
电脑软件的启动方法一般有双击，右击-打开或从开始菜单单击打开
1、一般安装软件后会在桌面创建快捷方式，直接打开。
2、若桌面没有快捷方式，可以在电脑左下角的“开始”—“程序”里面打开。
3、若“程序”里面也没有，可以打开软件的安装位置打开。
说明：第三种方法是按默认的安装路径找到的软件安装文件夹打开程序的，实际情况可以根据软件的具体安装路径选择打开。
应用软件的操作
文件操作包括如何操作打开，关闭、删除、移动、重命名和编辑文件
文件打开
文件打开方式见“如何启动软件”部分
常见不同后缀、格式文件打开方法：
.txt .doc .docx .obt 这些格式可以用微软的office打开，或者用wps打开。
mp3格式文件可以使用使用电脑自带的Media Player播放器或者其他的音乐播放器。
mp4、mpg. mpeg.等文件可以使用电脑自带的电影和电视功能或者其他视频软件打开。
文件关闭
一般软件点击右上角的“×”，再点击“确认”，即可关闭文件
文件删除
1、选中文件-右击-删除
2、选中文件-按“delete”键，即刻删除
文件移动
方法一：长按鼠标左键选中并拖动鼠标移动文件到想要的地方
方法二：右击鼠标—剪切-打开需要移动的地方-右击粘贴
文件重命名
方法一：选中文件—右击—重命名
方法二：鼠标左击—键盘F2，即可进行重命名
文件管理基础知识
硬盘分区
电脑中的文件都存放在硬盘中，而新买回来的硬盘相当于一张白纸 ，为了能够更好地使用它，需要在，白纸上划分出若干小块。然后再打上格子。硬盘分区就是这个道理，在安装操作系统之前，需要进行硬盘分区和格式化，然后才能投入使用。对硬盘进行分区后，各个分区独立使用，互不影响。在操作系统中每个分区都用一个盘符表示，如本地磁盘（C）、本地磁盘（D）等。
存储路径
文件的存储路径，就是文件在电脑硬盘中的存储位置，由硬盘分区、文件夹和子文件夹构成。其中硬盘分区的盘符为路径的第一项，是第一级目录，也叫做根目录，后面紧跟冒号和斜线（：/），文件夹和子文件夹中间则以斜线（/）隔开。
如何使用浏览器
主要介绍如何使用浏览器（以及搜索引擎）查找资料（以今日头条为例）。
1、首先在浏览器中搜索引擎输入今日头条，然后点击推送的今日头条进入官方页面：
2、然后就进入搜索引擎所在网页，这样才能进行搜索：
3、之后在搜索栏中输入搜索内容，可以是词语、短语也可以是句子：
4、最后点击搜索框后方的放大镜进行搜索：
5、然后就可以得到想要的信息了：
电脑的日常维护
日常注意事项
电脑的五大要害：静电、灰尘、水、震荡、病毒是电脑的五大要害
1、防静电：防止静电损坏电脑各部分电子原件，处理办法是将电脑机箱外壳接地，尽量使用三脚电源插头。
2、防尘：防止灰尘进入电脑机箱内，使用时保持环境清洁，并定期清理电脑主机内的灰尘。
3、防水：防止液体进入电脑的任何部分，保持室内通风。不要将电脑放在湿度较大的房间使用。
4、防震：在使用的过程要防止对电脑的震荡，应将电脑平稳放置在电脑桌上，以防不小心摔落等
5、防病毒：病毒是电脑的一大要害，在日常使用中要防止病毒的进入，需要给电脑安装防病毒软件，并经常更新病毒库，经常给电脑杀毒。
显示器维护
液晶显示器最大的禁忌在于触摸液晶面板。液晶面板表面有专门的涂层，这层涂层可以防止反光，增加观看效果。而很多用户不知道这点，总是习惯于用手去摸液晶屏幕，殊不知人手上有一定的腐蚀性油脂，会轻微的腐蚀面板的涂层，时间长了会造成面板永久性的损害。这种被损坏的面板在使用中会有斑驳陆离的感觉。另外，有些人喜欢用手去压面板，觉得很有意思。这绝对是个恶劣的习惯，这样做会导致坏点和暗斑，这可是永久性的损害，绝不可修复的！
主机维护
在电脑运行过程中，机器的各种设备不要随便移动，不要插拔各种接口卡，也不要装卸外部设备和主机之间的信号电缆。如果需要作上述改动的话，则必须在关机且断开电源线的情况下进行。
不要频繁地开关机器。关机后立即加电会使电源装置产生突发的大冲击电流，造成电源装置中的器件被损坏，也有可能造成硬盘驱动突然加速，使盘片被磁头划伤。因此，这里我们建议如果要重新启动机器，则应该在关闭机器后等待10秒钟以上。在一般情况下不要擅自打开机箱，如果机器出现异常情况，应该及时上报。
数据存放在不同分区，减少磁头对某一扇区的经常读写，导致这一扇区的损坏。 建议你使用不同的媒介定期对你的重要数据进行备份，并存放在不同的地方。一个文件可以在备份盘上放一份，可以打印一份，可以刻录成光盘。
键盘、鼠标的日常维护
（1）保保持清洁 过多的灰尘会给电路正常工作带来困难，有时造成误操作，杂质落入键位的缝隙中会卡住按键，甚至造成短路。我们在清洁键盘时，可用柔软干净的湿布来擦拭，按键缝隙间的污渍可用棉签清洁，不要用医用消毒酒精，以免对塑料部件产生不良影响。清洁键盘时一定要在关机状态下进行，湿布不宜过湿，以免键盘内部进水产生短路。
(2)不将液体洒到键盘上 一旦液体洒到键盘上，会造成接触不良、腐蚀电路造成短路等故障，损坏键盘。所以我们一般不要边喝茶边坐在电脑前,这样一不小心茶可能就洒在键盘上.
电脑病毒防护
电脑一旦感染了病毒，就会出现很多症状。导致系统性能的下降，影响用户的使用，甚至造成灾难性的后果。电脑在日常的使用过程中要定期进行病毒查杀，防患于未然。常用的电脑杀毒软件有360，金山毒霸和电脑管家等等。以金山毒霸为例介绍电脑杀毒的过程。
1、打开程序主界面
2、选择杀毒方式
3、开始杀毒。程序对磁盘内容自动进行扫描，如果检测到病毒会自动进行清除，并将结果显示在扫描栏中。
4、除此之外还可以对特点的盘进行杀毒。
%3Chowto_content%3E[{"type":"paragraph","attrs":{"is_abstract":true},"children":[{"type":"text","text":"电脑不仅能帮助我们快速完成重复性的工作，而且提供了一种休闲娱乐的方式。学电脑能够快速入门是每个新手梦寐以求的事情，但是不是每个人都能快速入门的。但是如果定制好合理计划，循序渐进，就会收到非常好的效果。","id":""}],"text":"","id":"doxcnn1cgBB9Ou4Dl28jwCkWsUY"},{"type":"heading","attrs":{"level":1},"children":[{"type":"text","text":"电脑的组成","id":""}],"text":"","id":"doxcn2PD6gx8AcPpB2HP12zArof"},{"type":"image","attrs":{"height":261,"note":[{"type":"text","text":"电脑的组成","id":""}],"url":"https://p3.douyinpic.com/large/tos-cn-i-qvj2lq49k0/f4f2131443794fcaab08acae580d2fca","width":336},"text":"","id":"doxcnsrQeX8D7lZ3RmNA23riePb"},{"type":"paragraph","children":[{"type":"text","text":"一个完整的电脑由软件和硬件组成。硬件主要包括我们常见的鼠标，键盘，显示器，主机和各种储存介质，电脑的硬件如同人的躯干和四肢；而软件如同人的大脑和神经系统，软件在硬件的基础上才能工作。","id":""}],"text":"","id":"doxcnAUHNs7W5mbdS4JzpVkr5yd"},{"type":"heading","attrs":{"level":1},"children":[{"type":"text","text":"基础入门","id":""}],"text":"","id":"doxcnFYU0YsZD7Jl0D5lY32a0Qd"},{"type":"heading","attrs":{"level":2},"children":[{"type":"text","text":"启动电脑","id":""}],"text":"","id":"doxcnWJyenUyu3HKUEU7Y13WlIf"},{"type":"paragraph","children":[{"type":"text","text":"电脑启动就是我们常说的“开机”，也是启动操作系统的过程。开机具有一定的顺序：","id":""}],"text":"","id":"doxcn4XLwfTnIHHmZUn5f272hzf"},{"type":"paragraph","children":[{"type":"text","text":"1、打开显示器","id":""}],"text":"","id":"doxcnyoUyr5PhMaEXhueeVAjhZE"},{"type":"image","attrs":{"height":418,"note":[{"type":"text","text":"启动电脑","id":""}],"url":"https://p3.douyinpic.com/large/tos-cn-i-qvj2lq49k0/84d5672065564403b8c3c562d0094d70","width":642},"text":"","id":"doxcnjaalPzUv7fJXppJGhE6I0f"},{"type":"paragraph","children":[{"type":"text","text":"2、打开主机","id":""}],"text":"","id":"doxcnKy4lghxTuhEhCw7keum9ne"},{"type":"image","attrs":{"height":390,"note":[{"type":"text","text":"启动电脑","id":""}],"url":"https://p3.douyinpic.com/large/tos-cn-i-qvj2lq49k0/18040a31264f4dcb9d30c0842e182f07","width":616},"text":"","id":"doxcn83mXyKiTF4cqvh18wbwp3g"},{"type":"paragraph","children":[{"type":"text","text":"3、开机自检","id":""}],"text":"","id":"doxcnKHEdNH6V6oIXVQ217JtdJb"},{"type":"image","attrs":{"height":374,"note":[{"type":"text","text":"启动电脑","id":""}],"url":"https://p3.douyinpic.com/large/tos-cn-i-qvj2lq49k0/78c8d271ab9246838183488c627a683d","width":620},"text":"","id":"doxcnfUCjtKKAcRpO62WCJDsOLf"},{"type":"paragraph","children":[{"type":"text","text":"4、启动成功","id":""}],"text":"","id":"doxcnWGECWgrdzOTeovyAFg5sAc"},{"type":"image","attrs":{"height":356,"note":[{"type":"text","text":"启动电脑","id":""}],"url":"https://p3.douyinpic.com/large/tos-cn-i-qvj2lq49k0/d1ae2f75783a428e81642ec19dfdff13","width":624},"text":"","id":"doxcnWyN6I33xm0a7nrQ2fGKcXg"},{"type":"paragraph","children":[{"type":"text","text":"通过上述步骤启动电脑，叫做冷启动，是常规的开机步骤。此外，在特殊情况下，我们还可以通过下面两种方式启动电脑。","id":""}],"text":"","id":"doxcnH7A9niLTXXe04mIeXWpDKb"},{"type":"paragraph","children":[{"type":"text","text":"热启动：是指电脑处于开机的状态下，通过【开始】菜单中的【重新启动|】命令对电脑进行重新启动。","id":""}],"text":"","id":"doxcn7lNtM7UPhGyJ0ZbZRZs1Zc"},{"type":"paragraph","children":[{"type":"text","text":"复位启动：当电脑在运行过程中出现异常而不能运行，且采用热启动失效时，可以采用复位启动方式重启电脑，方法是按下主机箱上的【复位】按钮即可。","id":""}],"text":"","id":"doxcnmTNqA4CvLmyAx3AAZ3mtZz"},{"type":"image","attrs":{"height":311,"note":[{"type":"text","text":"启动电脑","id":""}],"url":"https://p3.douyinpic.com/large/tos-cn-i-qvj2lq49k0/bf20ae29e5a241a3bde25fbd2a1badb2","width":560},"text":"","id":"doxcnlp0UAvwcM3QsqhNEcs8ryc"},{"type":"heading","attrs":{"level":2},"children":[{"type":"text","text":"关闭电脑","id":""}],"text":"","id":"doxcnqdkx8I57aUSAOt727zkvBc"},{"type":"paragraph","children":[{"type":"text","text":"使用完电脑后，需要将其关闭。电脑的关机顺序与开机顺序正好相反。即先关主机电源，然后逐一关闭外部设备的电源。遵循正确的开关机顺序可延长电脑的使用寿命。","id":""}],"text":"","id":"doxcnET7oxGL3LnIsTmLbRziP9f"},{"type":"paragraph","children":[{"type":"text","text":"正确的关机方法为：在系统桌面上单击【开始】按钮，在弹出的【开始】菜单中单击【关机】按钮，电脑将停止所有程序并退出操作系统，接着系统将自动断开主机电源，然后再依次关闭显示器、音箱等外接设备即可。","id":""}],"text":"","id":"doxcnYjJJHQOzWXgMOgL1gAcUdd"},{"type":"image","attrs":{"height":353,"note":[{"type":"text","text":"关闭电脑","id":""}],"url":"https://p3.douyinpic.com/large/tos-cn-i-qvj2lq49k0/964e2feb98b94496a8e3f5b322412bfb","width":570},"text":"","id":"doxcnI9ptXwvmHOkZFSnz2Bcxph"},{"type":"heading","attrs":{"level":2},"children":[{"type":"text","text":"如何使用键盘","id":""}],"text":"","id":"doxcnu1b0Gki9gLSTMz73qfDRBf"},{"type":"paragraph","children":[{"type":"text","text":"键盘是用于操作计算机设备运行的一种指令和数据输入装置，也指经过系统安排操作一台机器或设备的一组功能键（如打字机、电脑键盘）。","id":""}],"text":"","id":"doxcnlXhwmLT1CR3WwlDCdt2szc"},{"type":"paragraph","children":[{"type":"text","text":"电脑键盘由功能键区、主键区、编辑键区，数字键区和小键盘区5个区组成。其中常用操作打字是在主键区完成的。","id":""}],"text":"","id":"doxcnwzDHVKBOLcbtgD34YSSmmd"},{"type":"paragraph","children":[{"type":"text","text":"键盘是最常用也是最主要的输入设备，通过键盘可以将英文字母、汉字、数字、标点符号等输入到计算机中，从而向计算机发出命令、输入数据等。","id":""}],"text":"","id":"doxcnkSuUD4HYGpqND9sQE0c15e"},{"type":"image","attrs":{"height":441,"note":[{"type":"text","text":"如何使用键盘","id":""}],"url":"https://p3.douyinpic.com/large/tos-cn-i-qvj2lq49k0/4b35f1cfc1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flash disk)盘的简称，据谐音也称“优盘”。U盘是闪存的一种，故有时也称作闪盘。U盘与硬盘的最大不同是，它不需物理驱动器，即插即用，且其存储容量远超过软盘，极便于携带。","id":""}],"text":"","id":"doxcnvZG05r9SYTHBeaeFmKW73c"},{"type":"image","attrs":{"height":800,"note":[{"type":"text","text":"U盘","id":""}],"url":"https://p3.douyinpic.com/large/tos-cn-i-qvj2lq49k0/403377100bba4d01b5983409264bf1b5","width":800},"text":"","id":"doxcnAKctMEVnBnKVXxSowjRxJe"},{"type":"heading","attrs":{"level":3},"children":[{"type":"text","text":"","id":""}],"text":"","id":"doxcnd8Teem54BVBV9LVq19yChh"},{"type":"heading","attrs":{"level":1},"children":[{"type":"text","text":"软件操作","id":""}],"text":"","id":"doxcnvbG8pQswkSxgsqAyLdBq2g"},{"type":"paragraph","children":[{"type":"text","text":"电脑软件（Computer Software）是指计算机系统中的程序及其文档。一般来讲软件被划分为系统软件、应用软件，系统软件为计算机使用提供最基本的功能，可分为操作系统和支撑软件，其中操作系统是最基本的软件，常见的操作系统包括为微软的Windows系统。","id":""}],"text":"","id":"doxcn4m20QLI68W1B7ghkr4Jtlc"},{"type":"image","attrs":{"height":731,"note":[{"type":"text","text":"软件操作","id":""}],"url":"https://p3.douyinpic.com/large/tos-cn-i-qvj2lq49k0/f8399e0157844143b64a8f0df2e6bd1a","width":1300},"text":"","id":"doxcnCMiolsmqcTKofaZYRzG9gg"},{"type":"heading","attrs":{"level":2},"children":[{"type":"text","text":"软件的基础操作","id":""}],"text":"","id":"doxcnWDfb5MCy290xAs7nq0GGye"},{"type":"paragraph","children":[{"type":"text","text":"软件的使用包括软件的下载、安装和卸载：","id":""}],"text":"","id":"doxcnZWBFWAnPcKqx73onK9aqYz"},{"type":"heading","attrs":{"level":3},"children":[{"type":"text","text":"软件的下载","id":""}],"text":"","id":"doxcnyHFtGbdlYQJ21oAPo8pw2f"},{"type":"paragraph","children":[{"type":"text","text":"1、浏览器下载","id":""}],"text":"","id":"doxcnvFDA0NCxzMHmn2Adjlkw9d"},{"type":"image","attrs":{"height":902,"note":[{"type":"text","text":"软件的下载","id":""}],"url":"https://p3.douyinpic.com/large/tos-cn-i-qvj2lq49k0/c9d07064be6a41bca9abe0de169ba473","width":1048},"text":"","id":"doxcnsu0Le4JwlKbvFQm0munSGg"},{"type":"paragraph","children":[{"type":"text","text":"2、软件官网下载","id":""}],"text":"","id":"doxcnDRl8ZflWVJ1ILzjLvGljxd"},{"type":"image","attrs":{"height":1051,"note":[{"type":"text","text":"软件的下载","id":""}],"url":"https://p3.douyinpic.com/large/tos-cn-i-qvj2lq49k0/a1020c2ec373473b95d3247b300cbfe6","width":1920},"text":"","id":"doxcnXC2APHsUxUTdueQwh7fZR7"},{"type":"paragraph","children":[{"type":"text","text":"3、电脑管家或360软件管家等下载软件（下图为360软件管家）","id":""}],"text":"","id":"doxcnxpHdcwNVVPtKqM9A68AWJd"},{"type":"image","attrs":{"height":1042,"note":[{"type":"text","text":"软件的下载","id":""}],"url":"https://p3.douyinpic.com/large/tos-cn-i-qvj2lq49k0/ac2d5f11a23948f39bc1dcfa452c8bf6","width":1920},"text":"","id":"doxcnATJeTbpIGyJ64MnwpBm3sf"},{"type":"heading","attrs":{"level":3},"children":[{"type":"text","text":"软件安装","id":""}],"text":"","id":"doxcnLfosM4RIQgKsG1R58TlqXd"},{"type":"paragraph","children":[{"type":"text","text":"第一种就是你下载下来的是.exe文件的应用程序，这种程序一般都是安装包，就是你双击之后，会进入安装界面；第二种就是不需要安装的，你下载下来的是一个压缩文件，你只需要解压就可以使用。","id":""}],"text":"","id":"doxcn5WCEbf4VihQHNs96llUfkd"},{"type":"paragraph","children":[{"type":"text","text":"电脑软件安装过程中特别要逐一择安装设置（安装盘位）的选择、流氓软件选项勾选等。","id":""}],"text":"","id":"doxcnXar2vO45gDkIf76DbMTKZc"},{"type":"image","attrs":{"height":390,"note":[{"type":"text","text":"软件安装","id":""}],"url":"https://p3.douyinpic.com/large/tos-cn-i-qvj2lq49k0/25be51d409f542f1949e7fc1e536ae06","width":610},"text":"","id":"doxcn3Adrk3qosxaIVHtAZ7IlXN"},{"type":"heading","attrs":{"level":3},"children":[{"type":"text","text":"软件的卸载","id":""}],"text":"","id":"doxcnCcapikY8srnxAfJHGEz8y7"},{"type":"paragraph","children":[{"type":"text","text":"控制面板—程序和功能—找到要卸载的软件—右击卸载","id":""}],"text":"","id":"doxcnTh3RAkP6uWH1UC8zw3SkMf"},{"type":"image","attrs":{"height":653,"note":[{"type":"text","text":"软件的卸载","id":""}],"url":"https://p3.douyinpic.com/large/tos-cn-i-qvj2lq49k0/e603ea1aa0494cc0b9259eb3df7b7ad0","width":1831},"text":"","id":"doxcnv1Ro7vs6m5b8Drc309leQh"},{"type":"heading","attrs":{"level":3},"children":[{"type":"text","text":"软件的启动","id":""}],"text":"","id":"doxcnzOFsw0qFTpxnfvzGYMwW3g"},{"type":"paragraph","children":[{"type":"text","text":"电脑软件的启动方法一般有双击，右击-打开或从开始菜单单击打开","id":""}],"text":"","id":"doxcn15WjZ6sKJ1HSKPIYlFOGHh"},{"type":"paragraph","children":[{"type":"text","text":"1、一般安装软件后会在桌面创建快捷方式，直接打开。","id":""}],"text":"","id":"doxcnN4tt9pwDInYKb9Mz9Qeenh"},{"type":"image","attrs":{"height":393,"note":[{"type":"text","text":"软件的启动","id":""}],"url":"https://p3.douyinpic.com/large/tos-cn-i-qvj2lq49k0/1fbf3da352a946129708ede4ebba685d","width":230},"text":"","id":"doxcnqh8tICuNfbKN7xUOvdjzgf"},{"type":"paragraph","children":[{"type":"text","text":"2、若桌面没有快捷方式，可以在电脑左下角的“开始”—“程序”里面打开。","id":""}],"text":"","id":"doxcn0X3zsfw0T2OigbTXun670p"},{"type":"image","attrs":{"height":383,"note":[{"type":"text","text":"软件的启动","id":""}],"url":"https://p3.douyinpic.com/large/tos-cn-i-qvj2lq49k0/c3bee83560214e758c25900f1e993ebb","width":369},"text":"","id":"doxcnfwiBZXeO4es6zqaFHNvxxc"},{"type":"paragraph","children":[{"type":"text","text":"3、若“程序”里面也没有，可以打开软件的安装位置打开。 ","id":""}],"text":"","id":"doxcndHiojmsRyDlkBDeNHAU08e"},{"type":"image","attrs":{"height":851,"note":[{"type":"text","text":"软件的启动","id":""}],"url":"https://p3.douyinpic.com/large/tos-cn-i-qvj2lq49k0/610324c418e4458e8c0a22c830d0ae6b","width":1157},"text":"","id":"doxcng8CaZTiIBHfwSpGCPTxmsb"},{"type":"paragraph","children":[{"type":"text","text":"说明：第三种方法是按默认的安装路径找到的软件安装文件夹打开程序的，实际情况可以根据软件的具体安装路径选择打开。","id":""}],"text":"","id":"doxcnUrH9m7aXKpmL8di02Txjef"},{"type":"heading","attrs":{"level":2},"children":[{"type":"text","text":"应用软件的操作","id":""}],"text":"","id":"doxcnVWLweYsFo6UkHmkusRqXkd"},{"type":"paragraph","children":[{"type":"text","text":"文件操作包括如何操作打开，关闭、删除、移动、重命名和编辑文件","id":""}],"text":"","id":"doxcnmFHRyOmkB0NRHme8XhZOUd"},{"type":"heading","attrs":{"level":3},"children":[{"type":"text","text":"文件打开","id":""}],"text":"","id":"doxcn2HUnmuBgNi5fkBtqtkPvDh"},{"type":"paragraph","children":[{"type":"text","text":"文件打开方式见“如何启动软件”部分","id":""}],"text":"","id":"doxcnoRkYFqbtkdVz6sYiKSJm1o"},{"type":"paragraph","children":[{"type":"text","text":"常见不同后缀、格式文件打开方法：","id":""}],"text":"","id":"doxcnINCPSdcfclomKSWMZcJVDb"},{"type":"paragraph","children":[{"type":"text","text":".txt .doc .docx .obt 这些格式可以用微软的office打开，或者用wps打开。","id":""}],"text":"","id":"doxcnR1Pjc7QYFURtSHYrAdPLjg"},{"type":"image","attrs":{"height":864,"note":[{"type":"text","text":"文件打开","id":""}],"url":"https://p3.douyinpic.com/large/tos-cn-i-qvj2lq49k0/c9cabf71fc20481f9578bf095ca1f9bb","width":1004},"text":"","id":"doxcnfj1ZKt4Isd7uHI5W2A9FdJ"},{"type":"paragraph","children":[{"type":"text","text":"mp3格式文件可以使用使用电脑自带的Media Player播放器或者其他的音乐播放器。","id":""}],"text":"","id":"doxcnm5vdc7kqm2SOlcu8J66xRn"},{"type":"image","attrs":{"height":414,"note":[{"type":"text","text":"文件打开","id":""}],"url":"https://p3.douyinpic.com/large/tos-cn-i-qvj2lq49k0/ce293d66a9bb41489cdb2fbae3ce70ab","width":473},"text":"","id":"doxcneS0NjUl4ene4EiPwoCJ5wc"},{"type":"paragraph","children":[{"type":"text","text":"","id":""}],"text":"","id":"doxcnnmao74VIBDIRRu7GGngZ7c"},{"type":"paragraph","children":[{"type":"text","text":"mp4、mpg. mpeg.等文件可以使用电脑自带的电影和电视功能或者其他视频软件打开。","id":""}],"text":"","id":"doxcnHPYCEIz3zHWwKloD8PXQcb"},{"type":"image","attrs":{"height":390,"note":[{"type":"text","text":"文件打开","id":""}],"url":"https://p3.douyinpic.com/large/tos-cn-i-qvj2lq49k0/b446efcf1f8c4d30a87b858228836b57","width":465},"text":"","id":"doxcnHkbSVeQdkjZTi6oOPDXZOe"},{"type":"heading","attrs":{"level":3},"children":[{"type":"text","text":"文件关闭","id":""}],"text":"","id":"doxcnJAeJWP9prk5i1x7CXOmiJe"},{"type":"paragraph","children":[{"type":"text","text":"一般软件点击右上角的“×”，再点击“确认”，即可关闭文件","id":""}],"text":"","id":"doxcnZvzeKQoENRswMXlgc3aLrc"},{"type":"image","attrs":{"height":265,"note":[{"type":"text","text":"文件关闭","id":""}],"url":"https://p3.douyinpic.com/large/tos-cn-i-qvj2lq49k0/3d048dd6baaf4c038914733581604606","width":1920},"text":"","id":"doxcnRKaU7VRSAD4BF03kxJxWCe"},{"type":"heading","attrs":{"level":3},"children":[{"type":"text","text":"文件删除","id":""}],"text":"","id":"doxcn9sENUPcMNjzqjaOUzt1Mqd"},{"type":"paragraph","children":[{"type":"text","text":"1、选中文件-右击-删除","id":""}],"text":"","id":"doxcnRArXeDMh2r6ZWFpolCU3Wb"},{"type":"image","attrs":{"height":370,"note":[{"type":"text","text":"文件删除","id":""}],"url":"https://p3.douyinpic.com/large/tos-cn-i-qvj2lq49k0/d223344d988c4849977028fcef58c01a","width":523},"text":"","id":"doxcn3qOpobrnevEF4IIQfQao2d"},{"type":"paragraph","children":[{"type":"text","text":"2、选中文件-按“delete”键，即刻删除","id":""}],"text":"","id":"doxcnjTLkSNDhyykhG0ROQ8doqh"},{"type":"heading","attrs":{"level":3},"children":[{"type":"text","text":"文件移动","id":""}],"text":"","id":"doxcnQiASBi9Co4KkLbmRqsQojf"},{"type":"paragraph","children":[{"type":"text","text":"方法一：长按鼠标左键选中并拖动鼠标移动文件到想要的地方","id":""}],"text":"","id":"doxcnH3UvFhNBCFptK91fmoGHSe"},{"type":"paragraph","children":[{"type":"text","text":"方法二：右击鼠标—剪切-打开需要移动的地方-右击粘贴","id":""}],"text":"","id":"doxcnIKc87Xc2gocBW3luiwOgeh"},{"type":"image","attrs":{"height":379,"note":[{"type":"text","text":"文件移动","id":""}],"url":"https://p3.douyinpic.com/large/tos-cn-i-qvj2lq49k0/369207ff4fa54563808241e6a6fa3b45","width":650},"text":"","id":"doxcnxX8Yg08Bp8whyd0mSDuVjg"},{"type":"heading","attrs":{"level":3},"children":[{"type":"text","text":"文件重命名","id":""}],"text":"","id":"doxcnBWTP1zgpxsiVqqk85mxe6c"},{"type":"paragraph","children":[{"type":"text","text":"方法一：选中文件—右击—重命名","id":""}],"text":"","id":"doxcny44mlde5UEJAE1vOKwrA1g"},{"type":"paragraph","children":[{"type":"text","text":"方法二：鼠标左击—键盘F2，即可进行重命名","id":""}],"text":"","id":"doxcnyj4Vgw7alh1SlVOQvJAtLe"},{"type":"image","attrs":{"height":385,"note":[{"type":"text","text":"文件重命名","id":""}],"url":"https://p3.douyinpic.com/large/tos-cn-i-qvj2lq49k0/fce2063a2e4f40998aeb819d3ade2c73","width":586},"text":"","id":"doxcn2YzXfzc93eTmbZYnYgYikb"},{"type":"heading","attrs":{"level":2},"children":[{"type":"text","text":"文件管理基础知识","id":""}],"text":"","id":"doxcnCBNgyat9bGTjsgoy7WmSxg"},{"type":"heading","attrs":{"level":3},"children":[{"type":"text","text":"硬盘分区","id":""}],"text":"","id":"doxcnTjTxMvRnTI7PioNlEZa9fe"},{"type":"paragraph","children":[{"type":"text","text":"电脑中的文件都存放在硬盘中，而新买回来的硬盘相当于一张白纸 ，为了能够更好地使用它，需要在，白纸上划分出若干小块。然后再打上格子。硬盘分区就是这个道理，在安装操作系统之前，需要进行硬盘分区和格式化，然后才能投入使用。对硬盘进行分区后，各个分区独立使用，互不影响。在操作系统中每个分区都用一个盘符表示，如本地磁盘（C）、本地磁盘（D）等。","id":""}],"text":"","id":"doxcntCrZbAV7y0uW5Vf4hk2CSg"},{"type":"image","attrs":{"height":227,"note":[{"type":"text","text":"硬盘分区","id":""}],"url":"https://p3.douyinpic.com/large/tos-cn-i-qvj2lq49k0/7bac31cc8bfc4f7f8fbb063000ff337b","width":1006},"text":"","id":"doxcneCZlm0A5Jv4kSSRGGfu90H"},{"type":"heading","attrs":{"level":3},"children":[{"type":"text","text":"存储路径","id":""}],"text":"","id":"doxcnmulWgi9sNCSmPpgGR2xuub"},{"type":"image","attrs":{"height":721,"note":[{"type":"text","text":"存储路径","id":""}],"url":"https://p3.douyinpic.com/large/tos-cn-i-qvj2lq49k0/41a6e2481bf74ccd9bea71b449ac2d4f","width":1096},"text":"","id":"doxcn6fyWtiLoWzbRANRzR2hxQh"},{"type":"paragraph","children":[{"type":"text","text":"文件的存储路径，就是文件在电脑硬盘中的存储位置，由硬盘分区、文件夹和子文件夹构成。其中硬盘分区的盘符为路径的第一项，是第一级目录，也叫做根目录，后面紧跟冒号和斜线（：/），文件夹和子文件夹中间则以斜线（/）隔开。","id":""}],"text":"","id":"doxcnIaVRht1XkEMrQ3dPDJJzte"},{"type":"heading","attrs":{"level":2},"children":[{"type":"text","text":"如何使用浏览器","id":""}],"text":"","id":"doxcnrcAGE1OtOmAl11kgw4p2Xd"},{"type":"paragraph","children":[{"type":"text","text":"主要介绍如何使用浏览器（以及搜索引擎）查找资料（以今日头条为例）。","id":""}],"text":"","id":"doxcn0LKyVvG4CrqSJTrAkEQeX1"},{"type":"paragraph","children":[{"type":"text","text":"1、首先在浏览器中搜索引擎输入今日头条，然后点击推送的今日头条进入官方页面：","id":""}],"text":"","id":"doxcno8TGkMhBBCYCX2qwtM8CwV"},{"type":"image","attrs":{"height":907,"note":[{"type":"text","text":"如何使用浏览器","id":""}],"url":"https://p3.douyinpic.com/large/tos-cn-i-qvj2lq49k0/64b847885311434b8fe792a16d5a1594","width":1654},"text":"","id":"WYGgd2WwwoemmmxIuzFcKeJtnFv"},{"type":"paragraph","children":[{"type":"text","text":"2、然后就进入搜索引擎所在网页，这样才能进行搜索：","id":""}],"text":"","id":"doxcndrUkeZBK2dzdNVoPjFr8Bf"},{"type":"image","attrs":{"height":387,"note":[{"type":"text","text":"如何使用浏览器","id":""}],"url":"https://p3.douyinpic.com/large/tos-cn-i-qvj2lq49k0/20b7b4797ed842ae8d8d23db7e8342ca","width":1572},"text":"","id":"AMOkdggI6oA8wUxCIOicC69Ln4e"},{"type":"paragraph","children":[{"type":"text","text":"3、之后在搜索栏中输入搜索内容，可以是词语、短语也可以是句子：","id":""}],"text":"","id":"doxcntodIOSAChA8KukSbwtNwPe"},{"type":"image","attrs":{"height":439,"note":[{"type":"text","text":"如何使用浏览器","id":""}],"url":"https://p3.douyinpic.com/large/tos-cn-i-qvj2lq49k0/97a01f2770de459da4fbbc630e26e813","width":1518},"text":"","id":"ZI8qdmKEEoom0YxIRNKclADhnPe"},{"type":"paragraph","children":[{"type":"text","text":"4、最后点击搜索框后方的放大镜进行搜索：","id":""}],"text":"","id":"doxcnZKtmoMqjVL7p1sM6qmeene"},{"type":"image","attrs":{"height":385,"note":[{"type":"text","text":"如何使用浏览器","id":""}],"url":"https://p3.douyinpic.com/large/tos-cn-i-qvj2lq49k0/b85d327176a34b4a95c132d0c61f2bba","width":1520},"text":"","id":"UcqqdWQU4oOEkwx2RD1c4UHVnJb"},{"type":"paragraph","children":[{"type":"text","text":"5","id":""},{"type":"text","text":"、然后就可以得到想要的信息了：","id":""}],"text":"","id":"doxcnCrekk4VvfRRCR9jCuAE3Mb"},{"type":"image","attrs":{"height":894,"note":[{"type":"text","text":"如何使用浏览器","id":""}],"url":"https://p3.douyinpic.com/large/tos-cn-i-qvj2lq49k0/1f0bd389033d41cbb9eb51574390247d","width":888},"text":"","id":"BEI0diameoSycMxuwMiclwrznTh"},{"type":"heading","attrs":{"level":1},"children":[{"type":"text","text":"电脑的日常维护","id":""}],"text":"","id":"doxcnmsDJxAPJtvU7iKKJrLXAIe"},{"type":"heading","attrs":{"level":2},"children":[{"type":"text","text":"日常注意事项","id":""}],"text":"","id":"doxcn3NWFGoKEHkfZV82h7HaA6d"},{"type":"paragraph","children":[{"type":"text","text":"电脑的五大要害：静电、灰尘、水、震荡、病毒是电脑的五大要害","id":""}],"text":"","id":"doxcnwPIn8QQYvzoJPAfU4zv2Qb"},{"type":"paragraph","children":[{"type":"text","text":"1、防静电：防止静电损坏电脑各部分电子原件，处理办法是将电脑机箱外壳接地，尽量使用三脚电源插头。","id":""}],"text":"","id":"doxcnqaCTC2VfmYdLkSB3C4OVqd"},{"type":"paragraph","children":[{"type":"text","text":"2、防尘：防止灰尘进入电脑机箱内，使用时保持环境清洁，并定期清理电脑主机内的灰尘。","id":""}],"text":"","id":"doxcnQSDQd2pWnV4Fqd5JUjqaKd"},{"type":"paragraph","children":[{"type":"text","text":"3、防水：防止液体进入电脑的任何部分，保持室内通风。不要将电脑放在湿度较大的房间使用。","id":""}],"text":"","id":"doxcnSTinOyJzdwZGO4DkEnfxke"},{"type":"paragraph","children":[{"type":"text","text":"4、防震：在使用的过程要防止对电脑的震荡，应将电脑平稳放置在电脑桌上，以防不小心摔落等","id":""}],"text":"","id":"doxcnxwTbLqikkti2nNjyIm9Zrc"},{"type":"paragraph","children":[{"type":"text","text":"5、防病毒：病毒是电脑的一大要害，在日常使用中要防止病毒的进入，需要给电脑安装防病毒软件，并经常更新病毒库，经常给电脑杀毒。","id":""}],"text":"","id":"doxcntrmJrrr2L0HhQavJgsVzhd"},{"type":"heading","attrs":{"level":2},"children":[{"type":"text","text":"显示器维护","id":""}],"text":"","id":"doxcnSSYQVhCgy7VO7LtalPIUJe"},{"type":"paragraph","children":[{"type":"text","text":"液晶显示器最大的禁忌在于触摸液晶面板。液晶面板表面有专门的涂层，这层涂层可以防止反光，增加观看效果。而很多用户不知道这点，总是习惯于用手去摸液晶屏幕，殊不知人手上有一定的腐蚀性油脂，会轻微的腐蚀面板的涂层，时间长了会造成面板永久性的损害。这种被损坏的面板在使用中会有斑驳陆离的感觉。另外，有些人喜欢用手去压面板，觉得很有意思。这绝对是个恶劣的习惯，这样做会导致坏点和暗斑，这可是永久性的损害，绝不可修复的！","id":""}],"text":"","id":"doxcny3JjfIV1YMnaMFhuPIJWqf"},{"type":"heading","attrs":{"level":2},"children":[{"type":"text","text":"主机维护","id":""}],"text":"","id":"doxcnwTx8LTz5mztACE6yiMhHFg"},{"type":"image","attrs":{"height":228,"note":[{"type":"text","text":"主机维护","id":""}],"url":"https://p3.douyinpic.com/large/tos-cn-i-qvj2lq49k0/7ae25dbc2542490e9cffe929370c55e0","width":290},"text":"","id":"doxcnQqUjM3qaLGK3ylhzpIEXkb"},{"type":"paragraph","children":[{"type":"text","text":"在电脑运行过程中，机器的各种设备不要随便移动，不要插拔各种接口卡，也不要装卸外部设备和主机之间的信号电缆。如果需要作上述改动的话，则必须在关机且断开电源线的情况下进行。","id":""}],"text":"","id":"doxcnpIjNesCTXbAcOHw8bd21jc"},{"type":"paragraph","children":[{"type":"text","text":"不要频繁地开关机器。关机后立即加电会使电源装置产生突发的大冲击电流，造成电源装置中的器件被损坏，也有可能造成硬盘驱动突然加速，使盘片被磁头划伤。因此，这里我们建议如果要重新启动机器，则应该在关闭机器后等待10秒钟以上。在一般情况下不要擅自打开机箱，如果机器出现异常情况，应该及时上报。","id":""}],"text":"","id":"doxcnGsQQeqwfk8LJOc4KqcVxE6"},{"type":"paragraph","children":[{"type":"text","text":"数据存放在不同分区，减少磁头对某一扇区的经常读写，导致这一扇区的损坏。 建议你使用不同的媒介定期对你的重要数据进行备份，并存放在不同的地方。一个文件可以在备份盘上放一份，可以打印一份，可以刻录成光盘。","id":""}],"text":"","id":"doxcnSmhgNwLRIu47S1ogISceTd"},{"type":"heading","attrs":{"level":2},"children":[{"type":"text","text":"键盘、鼠标的日常维护","id":""}],"text":"","id":"doxcnlmvjsBVbJpWfrnaAfZg3xh"},{"type":"paragraph","children":[{"type":"text","text":"（1）保保持清洁 过多的灰尘会给电路正常工作带来困难，有时造成误操作，杂质落入键位的缝隙中会卡住按键，甚至造成短路。我们在清洁键盘时，可用柔软干净的湿布来擦拭，按键缝隙间的污渍可用棉签清洁，不要用医用消毒酒精，以免对塑料部件产生不良影响。清洁键盘时一定要在关机状态下进行，湿布不宜过湿，以免键盘内部进水产生短路。","id":""}],"text":"","id":"doxcnXorYoDUolvNGIvSHE0n1Fg"},{"type":"paragraph","children":[{"type":"text","text":"(2)不将液体洒到键盘上 一旦液体洒到键盘上，会造成接触不良、腐蚀电路造成短路等故障，损坏键盘。所以我们一般不要边喝茶边坐在电脑前,这样一不小心茶可能就洒在键盘上.","id":""}],"text":"","id":"doxcnBigA0YSoL6pX58F6DZ4TSf"},{"type":"heading","attrs":{"level":2},"children":[{"type":"text","text":"电脑病毒防护","id":""}],"text":"","id":"doxcnEOZ7tyIKbP3ZxLNi8W7ctg"},{"type":"paragraph","children":[{"type":"text","text":"电脑一旦感染了病毒，就会出现很多症状。导致系统性能的下降，影响用户的使用，甚至造成灾难性的后果。电脑在日常的使用过程中要定期进行病毒查杀，防患于未然。常用的电脑杀毒软件有360，金山毒霸和电脑管家等等。以金山毒霸为例介绍电脑杀毒的过程。","id":""}],"text":"","id":"doxcnJJ7FypQjrHxaR8SYWTgrXb"},{"type":"paragraph","children":[{"type":"text","text":"1、打开程序主界面","id":""}],"text":"","id":"doxcnVX4GOq67b1537YJ6dxV3mg"},{"type":"image","attrs":{"height":725,"note":[{"type":"text","text":"电脑病毒防护","id":""}],"url":"https://p3.douyinpic.com/large/tos-cn-i-qvj2lq49k0/2223757c273a44bd82c47ccfae9e3aa0","width":1150},"text":"","id":"doxcnDqZ1EGGgk59sLJiT4Vx2Qg"},{"type":"paragraph","children":[{"type":"text","text":"2、选择杀毒方式","id":""}],"text":"","id":"doxcnrC5hBicaX79YFv27O9wi5d"},{"type":"image","attrs":{"height":725,"note":[{"type":"text","text":"电脑病毒防护","id":""}],"url":"https://p3.douyinpic.com/large/tos-cn-i-qvj2lq49k0/1a7183e0596947a6ad78c01d83dae481","width":1150},"text":"","id":"doxcnByatkFfAhstAxU6NrPIR1e"},{"type":"paragraph","children":[{"type":"text","text":"3、开始杀毒。程序对磁盘内容自动进行扫描，如果检测到病毒会自动进行清除，并将结果显示在扫描栏中。","id":""}],"text":"","id":"doxcnGfhqixaJcfZUfB6oWnX9Fh"},{"type":"image","attrs":{"height":725,"note":[{"type":"text","text":"电脑病毒防护","id":""}],"url":"https://p3.douyinpic.com/large/tos-cn-i-qvj2lq49k0/e8fbb9d70296406c89d1dd4fb13ccfe3","width":1150},"text":"","id":"doxcnszsl2L8n8xVPOdJSpdNBSg"},{"type":"paragraph","children":[{"type":"text","text":"4、除此之外还可以对特点的盘进行杀毒。","id":""}],"text":"","id":"doxcnOLpmXt0uUMDNCJfJHF5Kyh"},{"type":"image","attrs":{"height":725,"note":[{"type":"text","text":"电脑病毒防护","id":""}],"url":"https://p3.douyinpic.com/large/tos-cn-i-qvj2lq49k0/ba221c30213840eba06a09200a4039e7","width":1150},"text":"","id":"doxcnJMGfsP2nlVySpCYqIq7sLc"},{"type":"paragraph","children":[{"type":"text","text":"","id":""}],"text":"","id":"doxcn1MbilGtMLwf7nUBAYpk8Kx"}]%3C%2Fhowto_content%3E
8. 怎么用数字表判断lm339好坏
电容要用数字表测试，查查低压电源是否短路，驱动电路元件是否不良，压敏电阻是否损坏，线盘是否短路、LM339是否损坏。