问题

VRML is a(71)for 3D multimedia and sha

VRML is a(71)for 3D multimedia and shared virtual worlds on the WWW. In comparison to HTML, VRML adds the next level of interaction, structured graphics, and extra(72)(z and time) to the presentation of documents. The applications of VRML are(73), ranging from simple business graphics to entertaining WWW page graphics, manufacturing, scientific, entertainment, and educational applications, and 3D shared virtual worlds and communities.X3D is the name under which the development of VRML is continued. X3D is based on XML and is backwards(74)with VRML. Furthermore, it is componentized, profiled, and extensible, which makes it possible to use X3D in very different(75), from high-end visualizations to lightweight applications.

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参考答案

参考解析：

解析：VRML是为3D多媒体和在WWW上共享虚拟现实定义的文档格式。与HTML相比，VRML增加了低一级的交互作用、结构化的图形和表现文档的附加的维元(z和时间)。VRML的应用是很广泛的，应用范围从简单的商业图形到娱乐性的WWW页面，从制造业、科学、娱乐和教育方面的应用，到三维共享虚拟现实和虚拟社区等。VRML的继续发展就是X3D。X3D是基于XML的，是与VRML向后兼容的。而且它是组件化了的、形象化了的，是可扩展的，这使得X3D可以应用在完全不同的情景中，从高端的可视化应用到轻量级的应用都是X3D的领域。

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