It has three expressions: the dialogue between teaching subject and course text, the dialogue between teaching subject and teaching subject; teaching subject, the self - dialogue of teaching subject.
其表现形态有三：教学主体与课程文本的对话、教学主体与教学主体的对话以及教学主体的自我对话。
The tridimensional teaching material has three components:including distance education teaching material, the self-learning software and the conventional teaching material for the handicapped.
三维教材由远程教育教材、多媒体自学软件和传统的残疾人教材三部分有机组成。
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