题目

BEIJING—Chinese Premier Wen Jiabao has visited the left-behind(留守) children whose par­ents are working in cities before Children's Day. During a visit to northwest China's Shaanxi Province, Wen visited the home of Yang Saike, a primary school boy in a village of Xingping City. Yang,whose parents were working in Fujian, thousands of kilometers away,was cared for by his grandparents. His parents fail to go home even once a year. The premier held Yang in his arms and looked through his exercise book and praised him for his hard work. Wen talked with many children and asked them many 10．下列化学反应属于中和反应的是（　　）A．CaO+H2O═Ca（OH）2B．HCl+AgNO3═AgCl↓+HNO3C．3H2SO4+2Fe（OH）3═Fe2（SO4）3+6H2OD．H2SO4+BaCl2═BaSO4↓+2HCl