在html中select中p标签下打上文字以后不显示
设置其他的默认选中 selected = "selected"
12345< select id = "sel" >< option value = "1" >1</ option >< option value = "2" selected = "selected" >2</ option >< option value = "3" >3</ option ></ select >
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设置其他的默认选中 selected = "selected"
12345< select id = "sel" >< option value = "1" >1</ option >< option value = "2" selected = "selected" >2</ option >< option value = "3" >3</ option ></ select >