题目

如图所示质量为M的吊篮P通过细绳悬挂在天花板上，物块A、B、C质量均为m，B、C叠放在一起，物块B固定在轻质弹簧上端，弹簧下端与A物块相连，三物块均处于静止状态，弹簧的劲度系数为k（弹簧始终在弹性限度内），下列说法正确的是（ ）A. 静止时，弹簧的形变量为B. 剪断细绳瞬间，C物块处于超重状态C. 剪断细绳瞬间，A物块与吊篮P分离D. 剪断细绳瞬间，吊篮P的加速度大小为补全对话(15分)A：   【小题1】    ?B: I am watching TV.A: The TV show is boring. 【小题2】       .B: That sounds great.【小题3】         ?A: Yes, I do. I have a new soccer.B:    【小题4】        ?A: It is sunny outside. It is good for sports.B:    【小题5】        ?A: At the door of the park, OK?B: Great. See you.A．Where are we going to meet B．What are you doing, Tom C．How is the weather outside D．Do you have a soccer ball E. Let’s go and play soccer ballF. Are you watching TV