如图所示,人站立在体重计上,下列说法正确的是 A.人对体重计的压力和体重计对人的支持力是一对平衡力 B.人对体重计的压力和体重计对人的支持力是一对作用力和反作用力 C.人所受的重力和人对体重计的压力是一对平衡力 D.人所受的重力和人对体重计的压力是一对作用力和反作用力开放作文。 请根据下面提示,写一篇短文。词数不少于50。 In your spoken English class, your teacher shows you the following picture. You are asked to describethe picture and explain how you understand it. _______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________