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)、质量标准(quality standard)、虚拟现实(virtual reality)、轻量级(lightweight)、娱乐性(entertainment)、有效期(period of validity)、继续发展(continue to develop)、公共场所卫生许可证、价格合理(reasonable price)

[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. C

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学习资料：

[多选题]国家药典收载的药品必须是（）

A. A、价格合理^{(reasonable price)}
B. B、疗效确切
C. C、生产稳定
D. D、有合理的质量标准
E. E、服用方便

[单选题]公共场所卫生许可证有效期^{(period of validity)}限为四年，每（）复核一次。

A. 季度
B. 半年
C. 一年
D. 两年

[单选题]可使粪便化学法隐血试验出现假阴性的物质是（）。

A. 铁剂
B. 含过氧化物酶的新鲜蔬菜
C. 维生素C
D. 动物血
E. 粪便中血红蛋白浓度过高

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