Hello! My name is Mike. I am from the USA. Now I am in China with my parents. I like China. I like Chinese food, too. I have breakfast at home. I eat an egg, bread and porridge(粥)for breakfast. I do not like milk. I have no time to go home for lunch. So I have it at school. The lunch in our school is good. I can have different food for lunch. I eat rice, meat and vegetables. Sometimes I have noodles（面条） and dumplings(饺子). I have dinner at home with my parents. Sometimes we go out to eat with friends. We have chicken, vegetables and fruit.

自动灭火陶瓷砖，砖里压入了一定量的氦气和二氧化碳。这种砖砌成的房屋发生火灾时，在高温烘烧下，砖会裂开并喷出氦气和二氧化碳，从而抑制和扑灭火焰。自动灭火陶瓷砖的灭火原理是（   ）

卢敏，成都玛丽亚妇产儿童医院影像科医生，援藏医务工作者的一份子。她视高原为自己的第二故乡，视少数民族同胞为兄弟姐妹；她长期忍受着高原不良反应，忍受着远离亲人朋友的寂寞和生活不便的烦恼，把玛丽亚先进的超声技术、医疗理念传授给藏区同胞，被同胞们称为高原上美丽的格桑花！卢敏医生的援疆经历说明 （     ）

①各族人民间是平等团结互助和谐的关系    ②国家重视培养和选拔少数民族干部

③各民族风俗习惯一样                                    ④党和国家对少数民族地区发展的关心和支持