已知17g氨气与120g氧化铜在加热的条件下反应生成96g金属铜、14g空气中含量最多的气体单质和一种化合物X，则X的化学式为 ____，该化学反应方程式中氨气和X的化学计量数之比为 ____

假如你是Tom，认识了位新朋友Alan。这是Alan的个人资料，请根据下面的资料写一封电子邮件，把他介绍给你的朋友Peter。

要求：1. 必须包含表格内所有信息。2. 词数：不少于60字。

Dear Peter，

    I have a new friend.            

    I hope you like him, too.

    Tom

右图是探究铁锈蚀条件的装置。调节L端与R端的液面高度一致，塞紧木塞，一周后观察。下列推断错误的是

    Many people are interested in talking about life in the future. Some people 1 that life in the future will be easier and more comfortable. But others believe that it will be worse and more difficult than now. As for me, I 2 the idea of the first team.

    First，as for education, people will have 3 education .This is because of technology (科技). E-books will replace (取代) common books, robots will replace teachers, and students will not have to go to school every day. They will 4 at home through online teaching and will find learning more interesting.

    Second, people' s 5 will improve. Technology will also play a very important role. New medicine will help people get better quickly. Robots will help doctors and sometimes replace 6 Also, doctors will be able to cure more diseases (治愈更多疾病), 7 people will live longer.

    Third, housing problems will end. People will build houses under the sea. Also, some people will live 8 the moon. Then everyone will have a place to live.

    Fourth, hunger will stop all over the world. People will grow crops (庄稼) everywhere 9 on the top of buildings.

    Now what about you? 10 do you think life in the future will be like?

复习课中，教师给出关于x的函数y=2kx²﹣（4k+1）x﹣k+1（k是实数）．

教师：请独立思考，并把探索发现的与该函数有关的结论（性质）写到黑板上．

学生思考后，黑板上出现了一些结论．教师作为活动一员，又补充一些结论，并从中选出以下四条：

①存在函数，其图象经过（1，0）点；

②函数图象与坐标轴总有三个不同的交点；

③当x＞1时，不是y随x的增大而增大就是y随x的增大而减小；

④若函数有最大值，则最大值必为正数，若函数有最小值，则最小值必为负数．

教师：请你分别判断四条结论的真假，并给出理由．最后简单写出解决问题时所用的数学方法．