题目

A.I will go shopping with you. B.I will stay at home.C.I won’t go shopping with you. 答案：【答案】A【解析】【原文】I will go shopping with you instead of staying at home.一个重为20 N的物体置于光滑的水平面上，当用一个F＝5 N的力竖直向上拉该物体时，如图所示，物体受到的合力为A.16NB.23 NC.20 ND.0