document.write('<p>&nbsp;答案：B</p><div>解析：</div><div>Date 用于定义时间。</div><div>Week 类型允许你选择周和年 Select a week: &lt;input type=&quot;week&quot; name=&quot;week_</div><div>year&quot;&gt;。</div><div>Year 用于定义年。</div>');