在轿车行驶过程中，以轿车为参照物，路边的树木是____ 的（选填“运动”或静止“），司机能通过车内的后视镜看到乘客，这是光的____ 现象（选填“反射”或“折射”）；在轿车刹车过程中，车轮表面的温度会升高，这是通过____ 的方式改变其内能．

已知：如图，在Rt△ABC中，∠C=90°，AC=6，BC=8，点P在BC上运动，点P不与点B，C重合，设PC=x，若用y表示△APB的面积，求y与x的函数关系式，并求自变量x的取值范围．

    Showing your feeling is important. It is a mistake not to talk to anyone1you're feeling sad, worried or nervous. If you keep bad feelings inside, it can even make you2.

    But if you  3 with someone，like your mom or dad or your best friend，you'll usually begin to feel 4 than before. Now you're not all alone with your problems or worries. 5，it doesn't mean your problems and worries will disappear magically(神奇地）.But at 6，someone else understands what's 7 with you and can help 8 find ways to solve your problems.

    Your mom and dad want to know if you have any 9.They love you and they want to know what's happening in your life. But if you don't want to talk with them，what should you do? Find a trustworthy(可信的)friend or teacher at school or a relative. Maybe that person can help you deal with your problems. Then you'll feel as 10as before.