question: mass:gravity
choices.label: A B C D
choices.text: age:naive power supply:resistance altitude:air pressure pressure:friction
explanation: the magnitude of the "gravity" of an object is proportional to the "mass" of the object, and the "gravity" will be affected by the "mass" whether "naive" has nothing to do with "age", "age" does not affect "naive" the "resistance" of an object refers to the resistance of the object to the current. the size of the "resistance" has nothing to do with the "power supply", and the "power supply" does not affect the "resistance". "air pressure" generally decreases exponentially with the increase of "altitude", and "air pressure" will be affected by "altitude". "pressure" affects friction, "pressure" does not affect "friction".
relation: mass gravity R5.1
relation: altitude air pressure R5.1