写出一个大于1且小于2的无理数____ ．

阅读理解
   The best thing about going to school is learning how to read. Books are great friends. They can help you to learn about anything you want to know. They can go anywhere with you. You can read about animals, faraway places, people, and anything else.
   Books are written by people called authors(作者). Authors think of things they want to write about. They make a plan for a book and start to write .Some authors write books that give us information(信息)and teach us things. Authors are very important people because they help us learn. Find a good book to read and read every day ,You will enjoy your time with a good book.

“网络水军”是指有组织地在互联网上集体炒作某个话题或人物，以达到宣传、推销或攻击某些人或产品目的的群体。随着网络“民意”愈来愈深地影响现实舆论，个别网络运营商嗅出了其中的商业价值，组织雇用“网络水军”，肆意妄为，大赚昧心钱，已经突破了道德底线。

设集合A={x|y=ln（x+1）}，B={﹣2，﹣1，0，1}，则（∁_RA）∩B=（　　）

作者将“尼采”“发了疯”和“中国也不是（光热无穷，只是给与，不想取得）”放在一起，批判“送去主义”，“尼采”和“中国”之间是____的关系。