美国阿拉斯加的费尔班克斯素有“北极光之都”之称，其观赏极光的最佳季节是（   ）

分析句子使用的说明方法及作用。

但是最近也取得了一些令人振奋的突破性进展。比如生物学家皮斯用发根农杆菌转化柠檬天竺葵，发现转化植株中芳香族物质有显著提高，花朵散发出迷人的甜香味，植株矮化，枝叶更繁茂。

    When 4-year-old British royal family member Prince George started his first day of school in September, Chinese language was on his curriculum（课程）.

    And he wasn't alone. According to a report published by the British Council in September, about 51% of UK parents want their children to learn Chinese, as it's believed to be one of the most useful languages to know.

    In fact, the UK isn't the only country showing a growing interest in Chinese. In the USA, the language has become the second most spoken foreign language this year, after only Spanish, with over 2.million speakers, according to a survey by a US financial news website.

    So far, 67 countries and regions have included Chinese in their national curriculum, reported the China news website.

【写作内容】

⒈用约30个单词写出上文概要；

⒉用约120个单词发表你的观点，内容包括：

⑴简要分析“汉语热”的原因（2-3点）

⑵谈谈作为一名中学生，你应当怎样做才能更好地迎接“汉语热”。

①周朝实行分封制度    ②秦朝实行丞相制度

③封泥上文字是小篆字体   ④推恩令解决了王国问题。