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根据光的反射定律和折射规律，在图中画出入射光线AO的反射光线和折射光线，并标出入射角的大小．

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根据提示和要求作文。

       人生如登山，只有不畏艰险、勇于攀登的人，才能到达顶峰，体验一览众山小的成就感。不过攀上顶峰固然令人兴奋，但攀登过程又何尝不是一种收获，所以结果固然重要，但体验的过程更令人值得回味！

       成长过程中，我们曾经亲身经历过、真切体验过、用心感悟过、努力珍惜过……让我们敞开心扉，把体验到的爱与恨、苦与乐、成功与失败等等情感凝聚在笔端，倾斜于纸上吧！

       请结合自己的经历，以“我体验到的         ”为题，写一篇文章。

       要求：①要有真情实感，恰当地运用叙述、描写、抒情等表达方式。②语言准确流畅，表达完整。③字数不少于500字。④文章中不得出现真实的校名、班名、姓名。

In 1638, John Harvard donated some money and about four hundred books to a new university. This was the beginning of the library at Harvard University. The gift was so important that the university was named for John Harvard.
Thomas Bray began the first free lending library in the late 1600s. He set up more than 30 or these libraries in the American colonies. However, the idea for this kind of free library ended when Bray died in 1730. In 1731, Benjamin Franklin and some friends started the first subscription（订阅费） library in the United States. In a subscription library people pay money to become members, but they may borrow the books without paying again.
In the United States, every child had a free education. This idea soon led to free libraries. One of the first libraries that used tax money to buy books was a library in Peterborough, New Hampshire. This library was set up in 1833.