史书记载，春秋初年的170多个诸侯国，到战国初期就只剩下十几个了。这个材料所反映的历史发展趋势是（    ）

    During the summer holiday，Alice had a nice trip．First she took a plane from Changchun to Beijing．She went to the Great Wall．She was very tired．But she was  happy．She likes Beijing very much．Then she went to London by plane．She visited Big Ben，the clock tower．There were many museums in London．She learnt a lot there．People in London love eating fish and chips．She stayed in London for 5 days．Then she took a plane to Shanghai．Then she went to Changchun by plane．

根据短文，判断正误。