知识问答
最佳答案：Some experts predict that in the year 2020 there will be about 7 billion people
最佳答案：I like travelling very much. Beijing is one of the cities i have visited.My stay
最佳答案：The 29th Olympic Games,the main venue,the Olympic Park in Beijing,the Beijing Ci
最佳答案：Dear John,I was glad to hear that you were admitted by a key high school of Beij
最佳答案：If you were Li Hua, and your friend Jim from Britain would come to Beijing for t
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