题目

A Bite of China is a documentary that started on CCTV on May 14th. 2012. It tells the stories behind delicious food in different places of China and shows a lot about Chinese culture.Britain's Got Talent is a British television talent show and competition which began in June 2007. Anyone of any age with some kinds of talents can ask for a chance against each other to win the first prize .The Voice of China is a television singing competition. It started on July 13th. 2012 on Zhejiang TV. It is like The Voice of Holland which started in Holland in 2010. 【1】What can we know from A Bite of C用足量的CO还原14 g铁的氧化物的混合物,将生成的气体通入足量的澄清石灰水中,生成沉淀25 g,则这种混合物组成是①FeO、Fe2O3　②FeO、Fe3O4　③Fe2O3、Fe3O4中的　　　　,其物质的量之比为　　　　　。