—Do you get_______ ready for your camping? —No. We still have_______ to do. A. anything, something B. anything, anything C. everything, something D. everything, nothing 答案:C关于质点做曲线运动的描述中,不正确的是( )A.曲线运动一定是变速运动B.变速运动一定是曲线运动C.在平衡力的作用下,物体可以做曲线运动D.质点做曲线运动时所受的合力方向,与速度方向一定不在同一直线上