question: weight:mass
choices.label: A B C D
choices.text: subject:predicate noun:verb pressure:intensity of pressure buoyancy:power
explanation: "weight" refers to a measure of the magnitude of an object's gravity, "mass" refers to a physical quantity that measures the magnitude of an object's inertia, and the product of "mass" and the acceleration of free fall equals "weight". both "subject" and "predicate" belong to sentence components, and neither "subject" nor "predicate" are physical quantities. both "nouns" and "verbs" belong to content words, and neither "nouns" nor "verbs" are physical quantities. the force that occurs on the contact surface of two objects is called "pressure", and the "pressure" on the unit area of ​​the object is called "intensity of pressure", and "pressure" is equal to "intensity of pressure" multiplied by the force-bearing area. the force that an object immersed in a liquid or gas is held up vertically by the liquid or gas is called "buoyancy", and "power" refers to the source of all forces. , "buoyancy" and "dynamic" do not have a product.
relation: subject predicate R2.4
relation: noun verb R2.4
relation: pressure intensity of pressure R3.10
relation: buoyancy power R2.7