可见，答疑子系统的研发是现代远程教学的重要环节，对实现高质量的网上教学具有深远意义。

So the development and research of answering subsystem is an important part in the modern remote teaching.

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该系统包括了教学课件、网上虚拟实验室、习题测验、答疑、考试等全部教学环节在内的功能模块。

This system contains all function modules of whole teaching processes such as teaching courseware, virtual laboratory on the network, exercises testing, answer questions, examination and so on.

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