题目

根据短文内容，从题中所给的A、B、C、D四个选项中，选出正确选项。Some people think only school childrendo not agree with their parents, however, it is not true. Communication is a problemfor parents and children of all ages. If it's hard for you to communicate withyour parents, don't worry about it. Here are some suggestions for you to bridgethe generation gap(代沟)．Don't argue with your parents. Don'tget to your parents when you are angry. Your parents probably won't consideryour ideas if you are shouting at them. You can't express yourself well if youare angry. 下列说法正确的是（ ）A．质量不同的运动物体，质量大的动能一定大B．只要物体发生了形变，它一定具有弹性势能C．同一物体运动速度越大，它具有的动能就越大D．日夜奔流的河水只有动能没有势能