下列四个速度数值中,速度最快的是( )
A:750m/min
B:36km/h
C:15m/s
D:425cm/s
He donated his money to poor people, so we realized that he had a heart __________ love.
将一电荷量q=﹣2.0×10﹣6C的电荷从无穷远处移至电场中的A点,克服电场力做功3.0×10﹣4J,再将电荷从A点移至B点的过程中,电场力做功2.0×10﹣4J,规定无穷远处的电势能为零.则( )
pretty和prince中加粗部分读音相同。