速度、路程和时间之间的关系为ν=_________,也可以变形为________或_________。
s/t;s=vt;
________are in the same class. We are good friends.
A.Her and me
B.She and I
C.Me and she
D.I and her
多费率电能表的日计时误差为何要严格控制?