A:plant
B:to plant
C:plants
看图选出正确答案( )
“探究加速度与力、质量的关系”实验装置如图甲所示.图中小车的质量为M,钩码的质量为m,小车后面固定一条纸带,纸带穿过电磁打点计时器,计时器接50Hz交流电.
Their favorite sport is football, and they ________ play it after school.