秋天,稻子“笑弯了腰”,说明力可以改变物体的____.跳高场上,运动员“腾空而起”,说明力可以改变物体的____ .
我国各民族的分布具有( )的特点。
实数﹣ 2 的绝对值是( )
I have to speak to my grandpa loudly because something is wrong with his .