Document
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<style>
option{
height:30px;
line-height: 30px;
}
</style>
</head>
<body>
<select name="words" id="" multiple="multiple" size="6" style="width:100px;height:180px;text-align:center;">
<option value="1" name="words">心花怒放</option>
<option value="2" name="words">心花怒放</option>
<option value="3" name="words">心花怒放</option>
<option value="4" name="words">心花怒放</option>
<option value="5" name="words">心花怒放</option>
<option value="6" name="words">心花怒放</option>
</select>
</body>
</html>