multisplit 82" 100" IQBoard DVT. The analysis and recognition of the two aspects of the function of the not only the innate genetic characteristics and acquired learning process , but mainly depends on the innate genetic factors , that is, the congenital nature of the congenital inheritance must have a key to growth and development In the period , the sense of language is no exception . The key period of the growth and development of the language, that is, the key period for children's language acquisition is one year old .. The IQAio GR519 is an upgraded lightweight version based on the original IQAio GR511. The original dual-cavity structure was changed to a bottom-edge structure, so that the minimalist design accommodates modern classrooms and conference rooms. With one IQProjector V2 and one IQView E3821, you can achieve flexible and intelligent classroom.