下拉列表中的三项条目deviceSNMPList，默认选中：deviceSNMP:‘1’,

 deviceSNMPList: [
          {
            key: '0',
            label: 'v1'
          },
          {
            key: '1',
            label: 'v2c'
          },
          {
            key: '3',
            label: 'v3'
          }
        ],
        deviceSNMP:'1',

el-form中el-select数据绑定deviceSNMP

 <el-form :model="form" inline="true" ref="form" style="margin-bottom: -20px;margin-top:-20px">
	 <el-form-item style="margin-bottom: -10px; width: 100%" label="*SNMP版本:" :label-width="formLabelWidth"
                      prop="string">
          <el-select clearable size='mini' v-model="deviceSNMP" placeholder="请选择活动区域" autocomplete="off"
                     style="width: 100%">
            <el-option v-for="item in deviceSNMPList" :key="item.key" :label="item.label"
                       :value="item.key"></el-option>
          </el-select>
        </el-form-item>
 <el-form>