阅读材料，完成下列要求。

    今年的央视春晚最大特色之一就是众多非遗元素的融入，从分会场泉州的木偶节目到苏州评弹、华阴老腔，观众感受到了中华文化的博大精深。

    华阴老腔采用一人唱众人帮合的拖腔，伴奏音乐独设檀板的拍板节奏，构成该剧种的独有之长，世代流传，久演不衰。一曲《华阴老腔一声喊》，古老与现代相碰撞，以摇滚嫁接戏曲，大胆将摇滚和民谣音乐相结合，嗨翻全场。歌手谭维维携手华阴老腔的老艺人，将华阴老腔与年轻人熟悉和喜欢的现代摇滚大胆融合，成为本届春晚的一大亮点。《华阴老腔一声喊》将非物质文化遗产“华阴老腔”与流行音乐相融合，不仅喊出了秦腔浓郁的地方特色，展现了中国传统民间艺术的魅力，在传统中融入流行元素，也体现了国人勇于创新的精神面貌。

    华阴老腔这一剧种属于家族戏，只传本宗本姓本家男性，这种封闭的流传方式后来才被打破，老腔流传到外姓，其影响也越来越大。然而，目前依然处于即将消亡的濒危状态，迫切需要长期保护。

运用联系的相关知识并结合材料，分析华阴老腔成为本届春晚的一大亮点所带来的启示。

根据短文理解，选择正确答案。

    “Cool” is a word with many meanings. Its old meaning is used to express a temperature that is a little bit cold. As the world has changed, the word has had many different meanings. “Cool” can be used to express feelings of interest in almost everything.

    When you see a famous car in the street, maybe you will say. “It's cool.” You May think, “He's so cool,” when you see your favorite football player.

    We all maximize(扩大)the meaning of “cool”. You can use it instead of many words, such as “new” or “surprising”. Here's an interesting story we can use to show the way the word is used. A teacher asked her student to write about the waterfall(瀑布) they had visited. On the student's paper was just the one sentence, “It's so cool.” Maybe he thought it was the best way to show what he saw and felt.

    But the story also shows a scarcity(缺乏)of words. Without “cool”, some people have no words to show the same meaning. So it is quite important to keep some credibility(可信度).Can you think of many other words that make your life as colorful as the word “cool”? I can. And I think they are also very cool.

地球公转的周期是（　　）

阅读理解。