According to these, some suggestion on class placement, teaching environment and teaching equipment in physical education of children with MetalRetardation are introduced.
以这些特征为基础,介绍了智力落后儿童体育教学时的班级设置、教学环境和教学器械的选择方法。
2
The invention discloses a ultra low retardation optical film, which mainly comprises nanometer metal oxides dispersed in transparent resin with three-dimension crosslink structure.