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Решение:
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```html
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<!--+ run -->
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<select>
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<option value="Rock">Рок</option>
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<option value="Blues" selected>Блюз</option>
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</select>
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<script>
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var select = document.body.children[0];
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// 1)
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var selectedOption = select.options[select.selectedIndex];
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alert(selectedOption.value);
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// 2)
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var newOption = new Option("Classic", "Классика");
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select.appendChild(newOption);
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// 3)
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newOption.selected = true;
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</script>
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```
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