语句（）用于在HTML表单中添加默认选中的复选框。
- A.＜input type=radio name=s checked>
- B.＜input type=radio name=s enabled>
- C.＜input type=checkbox name=s checked>
- D.＜input type=checkbox name=s enabled>
正确答案及解析
正确答案
解析
HTML表单（Form）常用控件有：
·input type="text"：单行文本输入框
·input type="submit"：将表单(Form)里的信息提交给表单里action所指向的文件
·input type="checkbox"：复选框
·input type="radio"：单选框
·select：下拉框
·textArea：多行文本输入框
·input type="password"：密码输入框（输入的文字用*表示）
演示示例：
复选框允许用户在一组选项里，选择多个。示例代码：
＜input type="checkbox" name="fruit" value ="apple">苹果＜br>
＜input type="checkbox" name="fruit" value ="orange">桔子＜br>
＜input type="checkbox" name="fruit" value ="mango">芒果＜br>
用checked表示缺省已选的选项。
＜input type="checkbox" name="fruit" value ="orange" checked>桔子＜br>
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