<div class="col-50">    <label class="label-radio">        <input :disabled="disabled_input" type="radio" name="type" value="0" checked="checked" v-model="user.type">        <div class="item-media"><i class="icon icon-form-radio"></i><span class="pl6">個體</span></div>    </label></div><div class="col-50">    <label class="label-radio">        <input :disabled="disabled_input" type="radio" name="type" value="1" v-model="user.type">        <div class="item-media"><i class="icon icon-form-radio"></i><span class="pl6">公司</span></div>    </label></div>默認想讓第一個是選中的怎么做？