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老师讲解非常仔细，课堂风格独特，轻松诙谐的感觉，是我在学校很少见的，很喜欢老师的课堂哦⊙∀⊙！
老师讲解清晰，听完课程后，解题思路，一目了然，很满意非常好对我帮助非常大
老师讲解的很细致，内容体系完善，逻辑结构清晰，容易理解，原来不懂的地方一下子变得简单多了
老师的课很幽默，也很有趣，我即收获了前所未有的知识，也收获了乐观向上的精神，加油，我会变的更好
老师会授予我们方法，每讲一个知识点都会总结某个知识点，在这里听课完全不乏味
很好，让我学到很多东西，比老师上课讲的都细，旁边还有小提示，棒棒哒！
The United States covers a large part of the North American continent. 36 neighbours are Canada to the north, and Mexico 37 the south. Although the USA 38 a big country, it is not the largest in the World. In the year 2000, its 39 was over 280,000,000.
When this 40 first became a nation, after 41 its independence from England, it had thirteen states. 42 was represented on the American flag by a 43 . All the states 44 in the eastern part of the continent. As the nation grew towards the 45 , new states were added and new stars 46 on the flag. For a long time there were 48 states. In 1959, however, two 47 stars were added to the flag, representing the new states 48 Alaska and Hawaii.
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