VRML中TouchSensor传感器必须和感知接触的造型节点放在同一个组节点下，否则无法正确感知事件（）

选出应填入下面一段英语中______内的正确答案。

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, and extra(2)(z and time) to the presentation of documents. The applications of VRML are(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 which the development of VRML is continued. X3D is based on XML and is 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.通电试验合格

B.校正

C.鉴定

D.计量检定合格

A.机械式碰撞传感器

B.机电式碰撞传感器

C.电子式碰撞传感器

D.水银式碰撞传感器

A.冷却液温度传感器

B.节气门位置传感器

C.量板式流量传感器

D.热空气式流量传感器

在停车辅助系统中，如在超声波传感器周围使用无线电发射装置时会引起传感器误工作。()

A.温度

B.磁场强度

C.位移

D.电压