由此可写出各步反应的化学方程式．硫及硫的化合物间的转化关系可表示为：

阅读下面材料，按要求写一篇不少于800字的文章。

材料一：李清照的《夏日绝句》曾写道：“生当作人杰，死亦为鬼雄。”人生在世，草木一秋，轰轰烈裂，死又何妨？

材料二：一位禅师曾笑着说：“夜来香夜晚开花，并无人注意，它开花，只为了取悦自己！”。“白天开放的花，都是为了引人注目，得到他人的赞赏。而夜来香在无人欣赏的情况下开放自己，只是为了自己快乐。”

以上对于生命的理解，你有怎样的观点？ 要求选好角度，确定立意，明确文体，自拟标题；不要脱离材料内容及含意的范围作文，不要套作，不得抄袭。

阅读判断。根据短文内容，判断下列句子的正与误。

Long long ago, there was no paper in the world. People had to write characters(汉字) in bamboo slips or stones.Then there was a man named Cai Lun who was a Chinese man. He made people use all kinds of things to invent paper. From then on, people can use paper to write on. Paper is a great invention. We always remember the great inventor Cai Lun. Nowadays paper is very useful in our work, study and our life.It really means a lot to human beings