Listening, speaking, reading and writing should be mixed together to the maximum limit in the task type language communication activities.
并且尽可能地将听、说、读、写融汇于任务型的语言交际活动中。
The DocumentAttributes class is used to keep the document class metadata such as the document name, content type, language, and others.
documentattributes类用于保存Document类元数据，比如文档名称、内容类型、语言等。
The DocumentAttributes class is used to keep the document class metadata such as the document name, content type, language, and others.
documentattributes类用于保存Document类元数据，比如文档名称、内容类型、语言等。
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