烟花带来的坏处作文(精选10篇)
1.烟花带来的坏处作文 篇一
早知道世纪公园要放烟火,迎接国庆56周年的到来。到了那天,我就催爸爸妈妈快点带我去看烟火。
吃完饭,我们一家三口打车去世纪公园,一路上,去世纪公园的人流不断。我更是兴奋不已。还没到那边,就听见 一阵阵“砰——砰——”的声音,就像爆炸声。到了那里,啊!五颜六色、多姿多彩的烟火把世纪公园的上空装扮得绚丽多姿。世纪广场车水马龙、人山人海。我们下了车,登上仰望台,看着一簇簇的烟火,我情不自禁地拍起手来,为这眩目多姿的烟火喝彩。站在仰望台上,细细观看,烟火有的像五彩缤纷的花球,有的像绽开的花朵,有的像星星点点的流星,有的像仙女洒落的花瓣……有的烟火力大无比,都蹦到科技馆的墙上的,引得人们发出一阵阵惊叫声。
看着美丽的焰火天空,我想我要把这动人的景色写下来。
2.烟花带来的坏处作文 篇二
烟花的历史
烟花又称烟火、焰火,烟花的最大特色是能够绽放出五彩缤纷的颜色。在中国发明较早,主要用于军事、盛大的庆典或表演等。
关于烟花的由来,最早相传在隋末唐初,著名炼丹家、医药家孙思邈,为了专意炼丹和行医,隐居在湖南省浏阳县城东门外的一个岩洞内。他将采挖来的硫磺,混合硝石和木炭等物料,装入丹炉内,日夜炼制。历经寒署和屡次的失败,终于炼制出了火药。火药就是现在烟花的前身,而孙思邈也成为了浏阳的鞭炮烟花乃至全世界烟花鞭炮的奠基者。后人为了纪念他,将他隐居的岩洞称为“孙隐崖”,炼丹的地方称为“炼丹台”,洗药的井和泉分别称作“洗药井”和“洗药泉”,至今仍保存完好。
后来,到了唐太宗贞观年间,湖南东部连年旱涝大灾,民不聊生。这时,一个叫李畋的浏阳人,决心驱赶邪恶。他将竹筒填满火药,安上药线,点燃后响声宏大,火光四射,邪瘴终于被驱赶而去,人们得以安居乐业,天下太平。从此,浏阳烟花鞭炮便诞生了。浏阳人李畋被尊称为烟花鞭炮的“祖师爷”。人们在浏阳县城的田家巷,修建了一座祖师庙,以纪念李畋的功绩。现在,浏阳的麻石小街田家巷,尚存宋代所建的“祖师庙”,供奉着鞭炮业“祖师爷”李畋的石像。
到了宋代,烟花爆竹在民间繁盛一时。《后武林旧事》记有宋孝宗观海潮放烟火的情景:“淳熙十年(公元1183年)八月十八日,上诣德寿宫,共请两殿往浙江观潮……管军命于江面分布五阵,乘骑弄旗,标枪舞刀,如履平地。点放五色烟炮满江、及烟收、炮息,则诸船尽藏,不见一只。”周密在《齐东野语》中也记载了当时皇宫观看烟花的故事。
到了清朝,雍正登基时,要在元年元宵佳节燃放烟花、响炮,传旨鞭炮行业创新花样。当时浏阳的官吏诚惶诚恐,四处张贴告示,广纳良才,并指令鞭炮制造能手李泰限期创出新式烟花进贡,这使李泰寝食不安。一天,他路过铁匠铺,见铁锤下星火四射,有长有短,有红有白,有粗有细,有料有丝,心有所动。随后,李泰扫了一些铁屑,回到家中将其锤得粉碎,再掺以火药和米汤一起搅和。铁砂、火药拌和得大小粗细不等,再以黑硝作动力,装于底部导火线处,于是,便造出了能喷射出花色形态各异,或梅或菊等多姿多彩的花朵来。待李泰的新式烟花在紫禁城上空高升钻天,落下缤纷的花雨时,雍正看得眼花缭乱、目不暇接。这时的烟花,已经和现代烟花原理有些相似了。
时光荏苒,如今的状况又如何呢?中国的浏阳成了举世闻名的烟花生产基地;而美国的格鲁西公司却成为了最为走红的烟花企业。每每谈及烟花中的技术含量,总会有人提起美国总统就职典礼,提起北京奥运会、广州亚运会的开闭幕、提起诸多国际性会议。至于一些国家参加烟花大赛所用的花炮也是浏阳生产,只是改头换面贴了满是洋文的标签,却是鲜有人知。
烟花的化学原理
烟花五彩缤纷,到底内部有什么神秘的成分呢?现在我们来揭开烟花的神秘面纱吧!其实,烟花和爆竹大同小异,其结构都包含黑火药和药引。制作烟花的过程中加入一些发光剂和发色剂,能够使烟花呈现出五彩缤纷的颜色。
发光剂是金属镁或金属铝的粉末。当这些金属燃烧时,会发出白炽的强光。发色剂其实只不过是一些金属化合物。我们平日在学习上经常运用这些金属化合物来进行实验呢!金属化合物含有金属离子,当这些金属离子被燃烧时,会发出独特的火焰颜色。不同种类的金属化合物在燃烧时,会发出不同颜色的光芒。举例说,氯化钠和硫酸钠都属于钠的化合物,它们在燃烧时便会发出金黄色火焰。同样道理,硝酸钙和碳酸钙在燃烧时会发出砖红色火焰。为获得满意的焰色效果,配方设计时要考虑各种因素的平衡。根据光色加成原理,蓝光和红光按适当比例混合能产生紫光效果。评价发光剂的主要性能参数有主波长、色纯度、光度和燃烧速度。几种典型的发光剂则是红、绿、黄三色。
其实在化学课堂上,我们常常会运用以上结果来测试物质中所含的金属。这一类的化学实验称为焰色反应。烟花就是利用金属的这种特性制成的。制作烟花的人经过巧妙的排列,决定燃烧的先后次序。燃放烟花后,类似硝酸钾、木炭、硫磺等物质发生化学反应,引发爆炸,而爆炸过程中所释放出来的能量,大部分转化成光能。这样,烟花引爆后,便能在漆黑的天空中绽放出鲜艳夺目、五彩缤纷的图案了。
精密设计
烟花本质上是通过精心调和化学药剂,使其成为火药的艺术。但它也少不了爆炸和燃烧的相关化学和物理学。除此之外,为了能使烟花准确喷射,在空中呈现出各种各样的图案,关于运动和飞行的科学也很重要。烟花是集合了制作人的智慧、艺术性和想象力,将科学和技术合为一体的综合艺术。看着夜空中绚丽绽放的烟花,如果能明白你眼前正发生着什么,在晚会上会更增添一份感动吧!
与大批量生产的玩具烟花不同,喷射礼花是一发一发手工制作的特制品。虽然有些小型礼花的制作方法是固定的,但一般礼花还是由制作者单个独创出来的。而且,通常不会只发射一发礼花,焰火晚会上都是一连串的礼花轮流着点火发射。比方说,一开始是用小型烟花和连发烟花,接下来用喷射礼花来活跃气氛,高潮时用大型的喷射礼花,结尾时用繁星状的连续烟花,如同在一定时间内逐渐展开剧情的电视剧一样,构成了整场晚会。因此,一发一发烟花的设计固然很重要,但用怎样的节奏编排点燃烟花,这就是烟火师技术功力的体现了。在地面上燃放的极具规模的烟花,它的上方是绽放成大圆的喷射礼花,这种精妙的节奏感正是烟火师技术和智慧的体现。
规模等级
焰火晚会是指为节日、庆典等活动举办的,以燃放礼花弹、组合烟花、架子烟花等为主的晚会。根据焰火晚会举办的地点、环境、活动性质、规模,以及所燃放的烟花爆竹种类、数量与规格晚会分为A、B、C三级。
符合下列情况之一者属A级:
a.为国家级或国际大型活动所举办的焰火晚会
b.所燃放的礼花弹最大直径为305毫米
C.所燃放的礼花弹直径大于等于102毫米,数量大于等于2000发
符合下列情况之一者属B级:
a.为省级大型活动所举办的焰火晚会
b.所燃放的礼花弹最大直径大于等于178毫米,小于305毫米
c.所燃放的礼花弹直径大于等于102毫米,数量大于等于1 000发,小于2 000发
符合下列情况之一者属C级:
c.为市级大型有关活动所举办的焰火晚会
3.烟花带来的坏处作文 篇三
许多父母忙着工作,把孩子交给了电视机。电视机的确为人们带来许多娱乐,但同时也给孩子带来了许多坏处。
小孩花太多时间观看电视节目,导致他们学习和阅读的时间相对减少,而使他们的脑筋越来越迟钝,变得懒散。这样,孩子又怎能专心致志地学习呢?孩子没定时温习功课,结果学业成绩也退步了。
许多内容不健康的电视节目也影响孩子身心的.健康成长。电视节目里的演员粗暴的行为和粗鲁的语言,导致孩子看了也跟着学坏,他们错误地以为拳头是解决问题的方法。
4.拖拉的坏处作文 篇四
每天每时每刻,我们都在经历着自己人生中的那些小事或大事,有的事给人以开心,有的则让人难过,甚至有的事让人不惜选择放弃生命来获得解脱,这都是人生中的磨难,打败它就是人生的赢家,而被它打败则是人生的输家,成败往往就在一瞬间,而成功与否就在你的一念之间,你如果在一念之间犹豫了那么一刻,或许成功就和你失之交臂,反之,如果在一件拿不定主意的事上,你犹豫一段时间或许这段犹豫的时间最后让你做出的选择会给你的人生开辟另一条蹊径呢!
夏天将至,天气慢慢变热,洗澡便成了一天中最享受的时刻了,当温热的水洗掉一天的尘垢,疲惫,倦意,这是多开心的事呢!人生中的开心时刻就是由这些不起眼的快乐组成的吧!但是享受完泡澡的舒适之后,谁又明白要洗衣服的那种痛呢!虽说现在时代发展,洗衣机也是跟着进步,但是,对于待在学校这个牢笼里的我可没有在家那样安逸,没有亲爱的洗衣机宝宝给我解决脏衣服这个麻烦,所以就不得不手洗了,看着脏衣服,心塞的那是个厉害啊!人生就是如此多变,前一刻还在享受热水的温润,下一刻却要感受冷水的冰凉,虽说对于夏天而言这样温度的水还是很舒服的`,但是洗衣服这件事还是让我高兴不起来啊!所以,能偷懒的时候我绝对是不会放过的,比如说什么躲个懒啊!和室友凑一块儿直接扔学校的洗衣机啊!但是这样的机会是很少的,还是不能解决问题啊!所以我一般采取的政策就是“推脱”,但是还是不能赖掉它还在那里的事实。
今天洗澡之后,我还是像往常一样将衣服用洗衣粉泡好,准备第二天随便洗洗就好了,但就是这个决定让将来的那个我后悔了好一会儿,到了第二天,我准备瞧瞧它们的时候,顿时就傻眼了,我的白衬衫啊!全变成黑一块白一块了,天啊,这是怎么回事啊!顿时就不知道怎么办了,一看才知道原来是裤子掉颜色,染坏了所以衣服,哎!这就是拖延的坏处啊!用我室友的话说就是“恶人自有恶报啊!”自此之后,希望记住这个教训,以后还是不要拖拖拉拉了,今日事,今日毕。
5.说谎的坏处小学作文 篇五
当你们说谎时,你们有没有设身处地的为别人想过呢?当你们被别人欺骗的时候,心里不是会很生气吗?而且说谎的话不是只会让你的人缘更不好吗?每说一次谎,自己的心里,就会充满了罪恶感,不敢面对长辈,甚至说了一个谎,要讲更多的谎言,来弥补这些无聊的谎言,其实只要诚实的说出一切,多么轻松呢?
别以为说小谎,是不要紧的,现在说小谎,会越说越习惯,谎话也就越说越大,到时说谎都面不改色,根本就是个大坏蛋了,还会把爸爸妈妈都气坏了,这是多么严重的偏差行为啊!
6.网络的坏处英语作文 篇六
Every coin has two sides , which is the same as surfing the Internet. On one hand , we benefit a lot from computers. For instance , many people are accustomed to going shopping on the Internet, which is a way to save time and money. What’s more, Internet makes it convenient for friends and relatives to communicate with each other. So people are more closed. Besides, we can go through the news all over the world through the Internet, which can broaden our eyes and assist us to learn more about the world.
On the other hand, with the popularity of computer games, more and more teenagers are addicted to virtual world , leading to a terrible grade and health. Moreover, plenty of unhealthy information emerges on the Internet, making a bad influence on teenagers.
7.写熬夜坏处的英语作文 篇七
Do you often hang out or spend much time in pubs at late night?
If you answered yes to either of these questions, you are unfortunately one of the large groups of people who always stay up late. Because of the fierce competition in the society, it seems that everyone has endless work to do and twenty-four hours per day is not enough. Therefore, an increasing number of people stay up late in order to finish the mountainous work. Besides, lots of young people enjoy entertaining at late night. However, many of them are still not aware of the bad effects of staying up late. In fact, it does severe harm to us in three aspects, namely physical health, work efficiency and mental stress.
In the first place, staying up late badly impacts on our physical health condition. The human adrenal cortex hormone and growth hormone, which are vital substances for human body, only secrete at night. The former secretes before the dawn facilitating the carbohydrate metabolism and protecting the development of muscle function. The latter only secretes after sleeping. It can improve the growth of the young and slow down the aging of the elderly. However, if people often stay up late, the secretion of these two substances will be gravely impacted. Finally, our health condition will be degraded. It can cause a variety of harms to human body. Normally, frequent staying up late will lead to fatigue and degraded immunity. People may easily get sick when the weather gets a little bit colder or hotter. In addition, it can also cause headache. People may feel heavy in the brain and dizzy for a whole day. Besides, the fertility of both male and female will be impacted. For women, it will affect the secretion of female hormones and the quality of ova. It also tends to affect the menstrual cycle. For men, both the quality and quantity of sperm will be impacted. What is more, staying up late can also damage people’s eyesight, skin and memory capacity, and cause black eyes as well.
Furthermore, it negatively impacts on the work efficiency. On the one hand, owing to the discomfort of your health as mentioned above, you may feel distracted from the work. On the other hand, because of the decrease of the memory capacity, your work efficiency will be lower, which means that you may not complete the things as you want. Assume that you are a university student and you plan to review for your psychology examination next week after tomorrow’s class. Nevertheless, you stayed up late yesterday for some reason. Therefore, you probably be late for tomorrow’s class or even skip it. Thus, you must find other time to compensate for it. Afterwards, when preparing your examination, you may feel headache and cannot concentrate on it, thus having difficulty memorizing and understanding the psychological terms and principles. Therefore, your schedule for reviewing chapter 2 and chapter3 will be changed. You can only review chapter 2 and may not finish chapter 3. However, in order to finish reviewing on time, you are more than likely to stay up late again. Then, you will be in the vicious cycle and your work efficiency will be lower and lower.
What is also noticeable is that staying up late can bring about mental stress. Since your work efficiency is lower, you probably doubt yourself whether you are a capable person or not. You may think you are not so smart as others and even fear yourself that you can hardly get a good grade in your psychology examination, which makes you feel more anxious and upset. Besides, if you frequently stay up late, you definitely look tired and in low spirits. Therefore, when working on a group project, maybe nobody wants to be in the same group with you, a low-efficient and anxious person. Thus, you will feel separated from others, which possibly makes you more stressed and upset.
8.qq的好处与坏处作文 篇八
在当今的时代中,人们的沟通方式太多了,不在局限于面对面的聊天,qq就是一个很好的工具,它可以让你和朋友聊天,当然如果你想看到画面和听到声音,可以通过视频功能来实现,又或是你的朋友不在线,你也可以给他(她)留言,还可以发送离线文件。她还可以让我们认识五彩缤纷的世界。
qq带来的不仅有好处,而且也有坏处。也有很多人被qq所吸引了。例如,打牌,打麻将。妈妈给我讲过一个故事,故事是这样的:一天清晨,当人们从睡梦中醒来,面对新的一天和新的生活时,一个坐在电脑前玩了一整夜qq游戏的少年也想站起来活动一下筋骨,他刚从椅子上站起来,就突然栽倒了,在一旁的伙伴很快地去扶他,却怎么也扶不起来,一个年轻的生命就这样永远地消逝了。我问妈妈这个少年为什么会突然死亡呢?妈妈回答说:是长时间上网加之无充足的食物能量补给引起的极度疲劳造成的死亡。我感到很震惊,我想为了自己的身体健康,我以后一定要严格控制自己上网的时间和次数,不能长时间的玩游戏、看电视等。
有一次,我还问过邻居家的医生:长时间上网对身体有什么不好的影响?医生告诉我,长时间盯着电脑屏幕容易造成头痛、视力下降和免疫系统受损;长时间敲打键盘,会对手指、手腕、肩部、颈部造成损伤;长时间坐着,可能造成腰部的不适。另外,电脑辐射也是不能忽视的。
9.精选英语作文:睡眠不足的坏处 篇九
The Shortage of not Enough Sleep
Every person needs sleep everyday. But with the high development of society, most people have more and more things to do and have less time to sleep. As a result, many people are lack of sleep. For a short time, they may not realize the bad side of it, but it will bring something bad for them after a long term. First of all, lack of sleep will do harm to people’s look. If they do not sleep enough, they will get black eyes and bad skin easily, which will make people look no so beautiful. Secondly, lack of sleep is bad for the spiritual outlook. A person who lacking of sleep always looks tired and has no power to do things. Last, not enough sleep for a long time will have bad influence of thought. They always can’t be active in mind.
【参考译文】
10.关于广告的利弊好处坏处英语作文 篇十
关于广告的利与弊 英语作文 The advantage and disadvantage of the advertisement 广告的利与弊中文翻译,英文见下方 广告在当今社会中无处不在。看起来无论你走到哪里,她都会映入你的眼帘:超市、地铁、车站、公共建筑的墙体、垃圾桶甚至T恤衫。广告的内容可以关于
关于广告的利与弊 英语作文
The advantage and disadvantage of the advertisement
广告的利与弊中文翻译,英文见下方
广告在当今社会中无处不在。看起来无论你走到哪里,她都会映入你的眼帘:超市、地铁、车站、公共建筑的墙体、垃圾桶甚至T恤衫。广告的内容可以关于任何东西:从卖电话到租房,从治疗疑难杂症到办假证。/(从家用物品到大型机器、从玩具到航天器)毫不夸张的说,我们生活在一个广告世界里。作文地带-有翻译的英语作文网
广告的优点很明显。它给我们提供大批量的商品和服务,供我们做出最好的选择。对于商家而言,他们可以利用广告展示自己商品的特点,以便抓住消费者的视线来获取利润。
然而,我们也不能小视广告的缺点。①太多的广告会搞乱我们的生活并浪费我们宝贵的时间。它们打断电视节目,塞满我们的信箱,损毁了我们对自然的欣赏代替兴趣。人们通常对它们感到负担而不是满足。②另一方面,有些广告是非法的,传递错误信息并意在欺骗那些想急于解决问题的人。
The advantage and disadvantage of the advertisement 英文,中文翻译,请见上面。
Advertisement is omnipresent in our modern society.It seems wherever we go, such small ads will greet our eyes: the supermarket, the subways, the stop sighs, the walls of public buildings, the garbage cans, and whatsoever.The ads can be about everything from selling mobile phone, renting houses, treating difficult diseases to producing fake diplomats.(from domestic articles to machinery, from toys to aircrafts.)It’s no exaggeration that we live in the world of advertisement.The advantage of the ads is self-evident.They provide us with a good collection of goods and service, from which we can make our best choices.For the manufacturer, they can take advantage of the ads to project the characters of their products so as to seize the vision of the consumers and gain them huge profits.joozone.com
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