Richard was selected as representative and to deliver the speech written by the principal at the graduation ceremony.
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表单下拉选项框中默认选中的属性值为()
A. checked
B. disabled
C. selected
D. value
分组optgroup下拉列表框中分组的标识属性名为()
A. name
B. label
C. value
D. id
表单中select_option,option标签的display属性是()
A. inline
B. inline-block
C. block
D. 以上都不是
表单中select的display属性为()
A. inline
B. inline-block
C. block
D. 以上都不是