题干
—Sir, would you mind speaking a little more ______?
— Of course not. I thought you could follow me.
A：quickly
B：slowly
C：politely
D：suddenly
答案(点此获取答案解析）
B
的物体A，处于静止状态。若将一个质量为
的物体B竖直向下轻放在A上后的瞬间，则B对A的压力大小为（取
） （ ）
