党的十八大指出：“面对资源约束趋紧，环境污染严重，生态系统退化的严峻形势，必须树立尊重自然，顺应自然，保护自然地生态文明理念，把生态文明建设方在突出地位，融入经济建设，政治建设，文化建设，社会建设各方面和全过程，努力建设美好中国，实现中华民族永续发展。”

利用所学知识回答：

下图中雄伟壮观的布达拉宫位于  （              ）

将两只额定电压相同的小灯泡L₁、L₂串联在电路中，如图所示。闭合开关后，发现灯L₁较亮，灯L₂较暗，其原因是(   )

    Jack and Anna are good friends. They are Chinese. Jack likes sports very much. He can play volleyball , basketball and football . Anna likes music very much . She can't play ball games. But they both like playing on computers . They like eggs , bread and milk for breakfast . For lunch , Anna likes eating vegetables and fruit , but Jack likes chicken and fish . They both like hamburgers .But they don't like ice cream or rice.