VRML is a（1）for 3D multimedia and shared virtual worlds on

【名词&注释】

交互作用(interaction)、虚拟社区(virtual community)、虚拟现实(virtual reality)、轻量级(lightweight)、娱乐性(entertainment)、继续发展(continue to develop)

[单选题]VRML is a（1）for 3D multimedia and shared virtual worlds on the WWW.In comparison to HTML, VRML adds the next level of interaction,structured graphics,andextra（2）（z and time）to the presentation of documents.The applications of VRMLare（3）,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 wluch the development of VRML is continueD.X3D is based on XML andis backwards（4）with VRML.Furthermore,it is componentized,profiled, and extensible,which makes it possible to use X3D in very different（5）,from high-end visualizations to lightweight applications.

A. A

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学习资料：

[单选题]一套固结很牢、层厚相等的强硬岩层，经纵弯作用形成，其背斜转折端上，常出现（）。

A. A、虚脱构造
B. B、张节理和小型断层
C. C、层间小褶皱
D. D、膝折

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