One possible version：

Notice

The new library in our school has been set up .It will open tomorrow .Teachers and students may borrow books , but each is allowed to borrow two books at a time .You may keep the books for two weeks .Please return the books on time .Books should be taken good care of .Our new reading room will open after class this afternoon. There you can read newspapers and magazines , but you can’t take them out . Please return the books on time.In the reading room , please keep quiet .Don’t make any noise .Welcome to our new library .

题目分析：本文是一篇实用文，要求写一份通知。在写作时要注意通知是传达将要做的事，因此，写通知多用一般现在时和将来时态。书写通知的正文时，语言应简洁明了，把通知的对象、事由、时间、地点、内容有条理地说清楚即可。简单地说，就是"某人(单位)某时在某地干某事，加上注意事项"即可。因为这篇书面表达要点较多，所以除了要注意不要遗漏要点外，还需使用恰当的连接词把各个要点连接起来，当然还必须注意句子之间的合理安排，使之符合逻辑，也使文章显得条理清楚。

【亮点说明】本篇书面表达要点全面，结构紧凑 。文章开篇先介绍了通知的缘由，即学校新图书馆要开放，然后又提出了对师生的五项要求 即把通知对象，事件等表述清楚。文章通篇使用简单句，使得文章的语言通顺流畅，简洁明了，符合通知类书面表达对语言的要求。此外，作者还运用了祈使句，如Please return the books on time；Please return the books on time；please keep quiet .Don’t make any noise，被动句Books should be taken good care of；each is allowed to borrow two books at a time等增强了文章语言的力度。