【名词&注释】
虚拟社区(virtual community)、表面张力(surface tension)、道德品质(moral character)、轻量级(lightweight)、恢复原状(reinstatement)、献身精神(devoted spirit)、组氨酸(histidine)、勇于创新(be bold in making innovations)、继续发展(continue to develop)、刻苦钻研(elucubration)
[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. D