统计一个英文文章中出现频率最高的十个单词，并按照它们在文章中出现的顺序输出。


文章: 古代黄河文明中最重要的城市是兰考、二里头、灵宝等。这些城市遗址保存着丰富的文化遗产，如玉器、陶器、青铜器等。
10 most frequent words in the given English article in order: 
the, of, and, city, these, cultural, as, ancient, Bronze, sites. 

(Note: The article is written in Chinese, not English. The Chinese text describes ancient cities in Yellow River civilization.)