任务型阅读
     New rules and behavior standards(行为规范)for middle school students came out in March. ①Who are  the  most     excellect student? Middle school uses a new way to decide them. The best students won't only have high marks. They will also be kids who don't dye(染  ) their hair,smoke or drink. The following are some of the new rules.
     Tell the trueth. Have you ever copied someone else's   work on an exam? Don't do it again. Thats not something an honest student should do. If you have played computer games for two hours in your room,don't tell your parents you have done your homework.
    Do more at school.②Good students love animals and care for others. April is Bird- Loving Moth in China. Is your school doing anything to celebrate?  You should join!That way, you can learn more abaout animals ahd hoe to protest them. When people work together, it makes it more fun for everyone.
      Be open to new to new ideas. Have you thought that people live on the moon?Maybe you discover Earth someday. Don't look down on new ideas. Everyone's ideas are important. You should welcome them,because new ideas make life better for everyone.
      ③Use the Internet carefully.Try not to look at Web pages that are bad for you.
     You can use the Web for homework. Can't you find good Web sites for children?
    Here are some: Http://kids.eastday.com http://www.chinakids.net.com http://www.cycnet.com

        由是先主遂诣亮，凡三往，乃见。因屏人曰：“汉室倾颓，奸臣窃命，主上蒙尘。孤不度德量力，欲信大义于天下；而智术浅短，遂用猖蹶，至于今日。然志犹未已，君谓计将安出？”
        亮答曰：“自董卓已来，豪杰并起，跨州连郡者不可胜数。曹操比于袁绍，则名微而众寡。然操遂能克绍，以弱为强者，非惟天时，抑亦人谋也。今操已拥百万之众，挟天子而令诸侯，此诚不可与争锋。孙权据有江东，已历三世，国险而民富，贤能为之用，此可以为援而不可图也。荆州北据汉、沔，利尽南海，东连吴会，西通巴蜀，此用武之国，而其主不能守，此殆天所以资将军，将军岂有意乎？益州险塞，沃野千里，天府之土，高祖因之以成帝业。刘璋暗弱，张鲁在北，民殷国富而不知存恤，智能之士思得明君。将军既帝室之胄，信义著于四海，总揽英雄，思贤如渴，若跨有荆、益，保其岩阻，西和诸戎，南抚夷越，外结好孙权，内修政理；天下有变，则命一上将将荆州之军以向宛、洛，将军身率益州之众出于秦川，百姓孰敢不箪食壶浆，以迎将军者乎？诚如是，则霸业可成，汉室可兴矣。”
         先主曰：“善！”于是与亮情好日密。
          关羽、张飞等不悦，先主解之曰：“孤之有孔明，犹鱼之有水也。愿诸君勿复言。”羽、飞乃止。

 2015年5月21日至25日，第三届中国国际矿物宝石博览会在湖南举行，邵阳地区蕴藏着丰富的矿产资源．

（1）下列矿石的主要成分属于氧化物的是____ （填序号）．

（2）铁是应用最广泛的金属．生活中用铁锅做饮具，主要利用铁的____性；防止铁锅生锈，常用的方法有____．

（3）有X、Y、Z三种金属，它们具有如下性质：

①X、Z均不与稀盐酸反应  ②Y+2HCl=YCl₂+H₂↑   ③X+Z（NO₃）₂=X（NO₃）₂+Z

则X、Y、Z三种金属活动性由强到弱的顺序是____ ．