choices.label: A B C D
choices.text: oolong tea:package:sale projector:toggle:play thermometer:display:measure parachute:acceleration:landing
explanation: the "cultural relics" should be "unearthed" first, and then "identified". "oolong tea" should be "packaged" first, and then "sold". the "projector" will be "played". "switching" "projector" is not the correct wording, we should say "switching" slides. the "thermometer" can "display" the body temperature. the different driving states of the "parachute" include "acceleration" and "landing".
relation: unearthed cultural relics R4.2
relation: package oolong tea R4.2
relation: thermometer display R3.3
relation: display measure R4.2
relation: acceleration landing parachute R3.10