电流做的功,可以用______来测量.
电功或用电器消耗的电能用电能表来测量,
故答案为:电能表.
减小随机误差的主要方法是什么?
()is the tendency of a vessel to return to its origianl position after it is displaced therefrom.
A.inclining moment
B.Stability
C.Shearing force
D.Bending moment