单项选择题代码:list = [ 北京 , 上海 , 云南 , 天津 ]list.append( 西安 ) print(list)输出后的结果是 A、['北京', '上海', '云南', '天津', '西安'] B、['北京', '上海', '云南', '天津'] C、[ '西安','北京', '上海', '云南', '天津'] D、['北京', '上海', '云南', '天津西安']
单项选择题Among the four great inventions in ancient China, which one was known as “mother of civilization”? A、Gunpowder B、Compass C、Paper-Making D、Printing