【判断题】【消耗次数：1】
在拆卸主机之前必须断开电源，打开机箱之前可以双手用触摸地面或墙壁释放静电。
①
正确
②
错误
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相关题目
【多选题】
在拆下燃油系统组件之前,必须先释放燃油系统的压力,正确的方法是(
①
在油压快速测试接头端接上燃油压力表,用释压阀释放油压
②
通过燃油泵反向电路,把管路燃油泵回油箱
③
拧开回油管螺栓,释放油压
④
拔下油泵熔断丝,运转发动机进行卸压
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