代码编辑器：
x
1
<select>2
<option value="volvo">Volvo</option>3
<option value="saab">Saab</option>4
<option value="opel">Opel</option>5
<option value="audi">Audi</option>6
</select>7
<select> <option value="volvo">Volvo</option> <option value="saab">Saab</option> <option value="opel">Opel</option> <option value="audi">Audi</option></select>