需引入bootstrap
<!-- row -->
<div class="col-md-4 col-xs-12">
<div class="white-box">
<div class="form-group">
<h4>选择题目类型</h4>
<select class="selectpicker" id="test" >
<option value="1">选择题</option>
<option value="2">填空题</option>
<option value="3">计算题</option>
<option value="4">证明题</option>
</select>
<button class="btn btn-success" onclick="getType()">choose</button>
</div>
<div class="form-horizontal">
</div>
</div>
</div>
image.png
<div class="form-group">
<label class="col-md-12">YourAnswer</label>
<div class="col-md-12">
<select class="selectpicker" id="rightAnswer1" >
<option value="A">A</option>
<option value="B">B</option>
<option value="C">C</option>
<option value="D">D</option>
</select>
</div>
</div>