It was a summer afternoon in the countryside. Wan Bo, a university student, was painting while his classmate Tang Qi was making a wooden box by the river. A little riding on a rocking horse caught their eye by chance. It brought them back to their childhood, warm and happy.

    "Why not try to make one by ourselves?" said Wan Bo. "You are good at making things and I am interested in painting."

    "Actions speak louder than words," Tang Qi said. Then, the two young men began to collect some information about it. During those days, watching videos about caring(雕刻) and shaping wood into horse shapes on the Internet became an important part of their life.

    Several months later, a wooden rocking horse appeared. They felt so excited that they put the picture of it on the Internet right away. To their surprise, it attracted lots of people's attention and some even hoped to order one.

    The two young men thought it might be a good chance. They sent some forms to the customers to make a survey. According to the result, they made each customer a special rocking horse. These horses were quite different from those produced in other factories, and they soon became popular among the customers.

    In the first year of their new hobby, Wan and Tang made thirteen rocking horses. Sometimes, they also repaired rocking horses for people. They made the old ones look new again. Wan and Tang helped those people bring back many happy memories.

    Their hobby has now become a successful and busy business.

①铁在氧气中燃烧：____．

②硫在氧气中燃烧：____．

③镁在氧气中燃烧：____．

④铜在氧气中加热：____．

【传承民族文化，弘扬民族精神】

镜头一：2016年G20杭州峰会文艺演出定名为“最忆是杭州”， 其中《春江花月夜》、《采茶舞曲》、以梁祝化蝶改编的《美丽的爱情传说》、古琴曲《高山流水》等等诸多曲目，都凸显了妙不可言的中国文化元素。

镜头二：在新中国诞辰67周年和红军长征胜利80周年到来之际，2016年9月30日，某市隆重举行烈士纪念日公祭暨新婚夫妇向革命烈士献花活动。市委书记参加公祭活动并讲话强调。先烈们用鲜血和生命，谱写了一曲曲英雄赞歌，树立了一座座不朽丰碑，他们的光辉形象、伟大功绩和牺牲精神，是我们不忘初心、继续前进的动力源泉，是我们振奋精气神、集聚正能量的精神财富。

阅读文言文，回答问题

    固字孟坚，年九岁，能属文诵诗赋。及长，百家之言，无不穷究。性宽和容众，不以才能高人，诸儒以此慕之。永平初，东平王苍以至戚为骠骑将军辅政，延英雄。时固始弱冠，奏记说苍，荐桓梁、晋冯诸人，苍纳之。

    父彪卒，归乡里。固以彪所续前史未详，乃潜精研思，欲就其业。既而有人上书显宗，告固私改作国史者，有诏下郡，收固系京兆狱，尽取其家书。固弟超恐固为郡所核考，不能自明，乃驰诣阙上书，得召见，具言固所著述意，而郡亦上其书。显宗奇之，除兰台令史，帝乃复使终成前所著书。

    时北单于遣使贡献，求欲和亲，诏问群僚。议者或以为“匈奴变诈之国，无内向之心，不可”。固议曰：“汉兴已来，旷世历年，兵缠夷狄。绥御之方，其途不一，或修文以和之，或用武以征之，或卑下以就之。虽屈申无常，所因时异，然未有拒绝弃放，不与交接者也。虏使再来，然后一往，既明中国主在忠信，且知圣朝礼义有常，绝之未知其利，通之不闻其害。设后北虏稍强，方复求为交通，将何所及？不若因今施惠，为上策。”

    固后以母丧去官。永元初，大将军窦宪出征匈奴，以固为中护军，与参议。北单于闻汉军出，遣使款居延塞，欲朝见天子，宪遣固将数百骑出居延塞迎之。会南匈奴掩破北庭，固至私渠海，闻虏中乱，引还。及窦宪败，固先坐免官。

    固不教学诸子，诸子多不遵法度，吏人苦之。初洛阳令种兢尝行固奴阻其车骑吏呼之奴醉骂兢大怒畏窦宪不敢发心衔之。及窦氏宾客皆逮考，兢因此捕系固，遂死狱中。

（选自《后汉书·班固传》有删改）