煤电钻的工作电压是()V。 ["220","110","127","380"]
太阳的直径是地球的109倍,因此太阳的体积约是地球的()倍。 ["一万","十万","一百万","一千万"]
脱水器意外原因突然停电时的操作步骤?
恒功率型机械设备的机械特性是() ["拖动转矩与转速成正比","拖动转矩与转速成反比","负载转矩与转速成正比","负载转矩与转速成反比"]
What is the result?() ["0, 0, 0","150, 60, 0","Compilation fails.","150, 150, 150","An exception is thrown at runtime."]
HSE管理体系中危害识别的思路是什么?