2019 Zhejiang Question 3 Single-choice Differentiating 2019_浙江 Paper 3.下列式子属于比值定义物理量的是 A. $t = { \frac { \Delta x } { v } }$B. $a = { \frac { F } { m } }$C. $C = { \frac { Q } { U } }$D. $I = { \frac { U } { R } }$ Answer keyC ☆ SaveCan't do it, show the explanation查看原卷 →