读图，完成下列要求：

金刚石、石墨和C₆₀都是由____元素组成的单质．写出C₆₀在空气中完全燃烧的化学方程式____．

    Rich or poor， young or old， we all have problems. We should learn how to deal with our problems. Here are some ways.

    Firstly， we should learn to forget.有时我们会生朋友的气。Good friendships may be lost. Sometimes children have disagreements and decide not to talk to each other. However， this usually does not last for long. This is an important lesson for us: we can solve a problem by learning to forget.

    Secondly， we should regard problems as challenges(挑战). Many students often complain about school.他们有太多的作业要做。They think the rules are too strict. Education is an important part of our development. As young people， it is our duty to try our best to deal with each challenge with the help of our teachers. Don't worry about our problems. Let's face the challenges.

超速行驶是引发交通事故的主要原因．上周末，小鹏等三位同学在滨海大道红树林路段，尝试用自己所学的知识检测车速，观测点设在到公路l的距离为100米的P处．这时，一辆富康轿车由西向东匀速驶来，测得此车从A处行驶到B处所用的时间为3秒，并测得∠APO=60°，∠BPO=45°，试判断此车是否超过了每小时80千米的限制速度？（参考数据：$\sqrt{2}$=1.41，$\sqrt{3}$=1.73）