网页显示如下：

使用命令获取元素选择，无论“是”还是“否”前面的选择圆圈，返回的都是[]

从网页源码看，无论是还是否没有本质上的区别如下：
<div class="col-md-4" id="control41" data-title="是否半天">
  <div class="SheetRadioButtonList" id="ctl215143" data-type="SheetRadioButtonList" data-datafield="IsHalfDay" data-onchange="GetDiff('VacationStartDate','VacationEndDate','');" data-defaultitems="是;否" data-defaultselected="false">
  <div style="width: 20%; float: left;" sheetgropname="IsHalfDay_54e927d3-35f7-42a5-2a18-58165181a97a">
    <input name="IsHalfDay_54e927d3-35f7-42a5-2a18-58165181a97a" disabled="" class="inputMouseOut" id="2dc721a7-2182-41b0-4984-2cecc59cf292" type="radio" value="是">
    <label style="padding-left: 3px;" for="2dc721a7-2182-41b0-4984-2cecc59cf292">是
    </label>
  </div>
  <div style="width: 20%; float: left;" sheetgropname="IsHalfDay_54e927d3-35f7-42a5-2a18-58165181a97a">
    <input name="IsHalfDay_54e927d3-35f7-42a5-2a18-58165181a97a" disabled="" class="inputMouseOut" id="5aec0c13-37c1-430e-3389-5338048197a1" type="radio" value="否">
    <label style="padding-left: 3px;" for="5aec0c13-37c1-430e-3389-5338048197a1">否
    </label>
  </div>
</div>