题目

Misunderstandings________ from lack of communication，unless________ properly，may lead to serious problems. A . arisen; dealt with B . arising; dealt with C . rising; dealing with D . risen; dealing with 答案：B下列现象中，不能用惯性知识来解释的问题是（ ）A．人从行驶的车上跳下来容易摔倒B．上抛的石块最终要落回地面C．急刹车时，车要向前滑行一段距离D．小孩用力推站着不动的大人，不易推动