question: pressure:area
choices.label: A B C D
choices.text: distance:speed yield:quality current:voltage efficiency:time
explanation: when the "pressure" is constant, the larger the "area", the smaller the "pressure". When time is fixed, the faster the speed is, the farther the distance is. there is no obvious logical relationship between "yield" and "quality". when the resistance is constant, the greater the "voltage", the greater the "current". when the workload is constant, the lower the "efficiency", the longer the "time".
relation: area pressure R3.10
relation: speed distance R3.10
relation: voltage current R3.10
relation: time efficiency R3.10