question: foot:tire:track
choices.label: A B C D
choices.text: compass:sundial:starry sky brush:eye:finger dart:bullet:torpedo mirror:light:clear water
explanation: "foot", "tire" and "track" have the same function, and can help people or things move. the "compass" is used to locate the position, the "sundial" is used to time the time, and the "starry sky" can locate the position. "brush" can be used to write, "eyes" can sense light, "fingers" can be used to write, but cannot sense light. "brush" and "eyes" and "fingers" have different functions. "darts" and "bullets" and "torpedoes" have the same function, all have the effect of launching. "mirror" has the function of reflection, "light" has the function of lighting, "clear water" has the function of reflection, "mirror" and "light" and "clear water" have different functions.
relation: foot tire track R2.4
relation: dart bullet torpedo R2.4