Listen, the boys ______ with each other over there. Please go and see what has happened.
A:are arguing
B:are argued
C:argue
对下列物态变化现象的分析正确的是( )
放在水平地面上的物体在20牛的水平拉力作用下移动了6米,当拉力消失后又移动了1米,求拉力所做的功。