高二英语期中作文模板20篇

My mother is a virtuous wife and good mother.She has medium height and

beautiful face.She is a generous,good natured and warm-hearted woman.She looks

like actor Zhong Li Ti.

My mother has retired now.She lives on pension/social welfare and lives

with us.She is good at cooking,often treat us lavish dinner,consisting of

different dishes form various provinces.I like eat my mother dishes very

much.

She likes watch TV.My mother and I like to visit relatives

together.Sometimes we go shopping together.

When I have trouble that she always encourage me to do our best,she used to

say “It don’t matter if you win or not.The important thing is to do your best

and keep going”.

East,West,Home is the best.I wish my mother has a happy life every day.I

love my mother.It is a Chinese tradition to respect the children and support the

elderly.

Our Librar is a busy place.It is open every day from8:00--12:00 in the

morning and from 1:30--5:30 in the after-noon,except on Sundays.

The library contains a large variety of books. in it you will find both

literary and scientific and technical books in Chinese and in foreign

languages.In this building too,are reading-rooms with newspapers and

magazines.Perhaps English books account for over a half of those in foreign

lanuages.

We often go there to look for books which we want to borrow or to read

articles which we like to consult.Our library provides all useful reading matter

and reference materials according to our needs.Although we do not subscribe to

any magazines or newspapers,we are well informed about the recent developments

and new trends in the world as well as in our country.The library plays an

important role in our college life.

Human, science and nature, the three phase was quoted rates are inseparable. The wonders of nature, a little thing, through the baptism of the time, and meticulous observation, often can give a person with enlightenment.

Vast forests, sunshine give plants grace, to be able to get the nutrients and thrive. Such as the morning sun open the eyes of animals, everything is ready. Squirrels, squirrel, embarks from the house, looking for full sweet red pine nuts, all kinds of plant seeds and slowly by seeding them to other places. While the weasel feed on smaller herbivores, sable and then ate the weasel... As if people eat the big fish, big fish eat small fish, small fish eat shrimp, shrimp eat plankton, interlocking between RACES, interdependence restricts each other.

Foreign scientists have done an experiment: introduce the sheep in a rare nature reserve, where the bamiyan, natural environment is superior, and there is special personnel to the group of kids to their natural enemies, Wolf, moved to another place. So the sheep started in the breeding. Until grass and low shrubs are eaten, the number of sheep instead of less. Because they live too comfortable, there is no enemy attack, the number that is too carefree life let their constitution also fell. Then the scientists tried to introduce wolves again. The result is in the relationship between predator and prey, good robust species to survive, wolves eat sick defect part. Natural selection and evolution, has been the nature and even the survival of human society the same criteria.

Cut down some trees, is to destroy a part of birds and insects; Killing of bees, small fish, can also cause cannot spread pollen, fish cannot reproduce problem... Sabotaged a part of the food chain, will bring ill-defined disaster. Because in front of the natural fair, each species, each independent individual organisms is so beautiful and full of value.

Because of the diversity of species and colorful nature. Want to live in harmony with her and get the kind of treatment, will be good to nature, to understand the nature, and have good at discovering and innovative mind.

人类、科学、自然，这三者相生相息密不可分。大自然的奇妙之处在于：一件小小的事物，经过时间的洗礼以及细致入微的观察，往往能给人以启示。

广袤的森林中，阳光雨露给予植物恩泽，使其能够得到养料然后茁壮成长。等清晨的阳光掀开动物们的眼睛，一切也准备好了。松鼠、灰鼠从居所里出发，寻找饱满香甜的红松子，各种植物的种子于是慢慢的被他们带到其他的地方落地生根。而此时黄鼠狼以体型较小的草食动物为食，紫貂继而吃掉了黄鼠狼……就好像人吃大鱼，大鱼吃小鱼，小鱼吃虾米，虾米又吃浮游生物一样，各种族之间环环相扣，相互依存相互制约着。

外国的科学家曾做过一个实验：将一种稀有的羊引进自然保护区，那里水草丰美，自然环境优越，并且还有专门的人员为这群天之骄子将她们的天敌——狼，迁往另外的地方。于是羊群开始在此生息繁衍。直到草和低矮的灌木被吃光了，羊群的数量反而越来越少。原来是因为它们生活的太过安逸，没有天敌进犯，数量过于膨胀，太过悠闲的生活让它们的体质也下降了。后来科学家们尝试着再一次引进狼群。结果是在捕食者与猎物的关系中，健壮优良的品种得以存活，狼群则吃掉病弱残疾的部分。物竞天择，优胜劣汰，一直都是自然界乃至人类社会不变的生存准则。

砍掉了某种树林，就等于灭绝了一部分鸟类、昆虫;捕杀蜜蜂、幼小鱼类，也会造成花粉无法传播，鱼群无法繁衍的问题……大肆破坏生物链中的某一环，都会带来难以言说的灾难。因为在公平的自然面前，每个物种，每个独立的生物个体都是如此的美丽而富有价值。

大自然因为物种的多样性而五彩缤纷。想要与她和谐相处并得到其慈祥的对待，就要善待自然，了解自然，并拥有一刻善于发现与创新的心。

“Growing Pains” seems full of knowledge and experience. So it does because

all of us have growing pains and also growing gains in our lives.

Growing up is not a very enjoyable time. It means I have to work hard in

studying and in family. Theres always so much homework given by teachers and so

many arguments between the parents and me. The time is fair, but it seems it

gives pains three quarters and only one quarter to gains.

But gains give me power and confidence. Successes and friendship make me

happy and enjoyable. We played with snow in the winter that seldom snows, we

flew kites in the night that usually belongs to homework, we ate several ice

creams that almost made us cold. We picked up leaven that no longer high up!

Although pains are always more than gains, I believe both of them make my

life more colorful

Some days ago,it was the Chinese Spring Festival.So I went to shopping with

my parents.the old saying said that to go to outside to have a walk in the new

year,you could get the good luck within this whole year.it always a happy

festival in our country,and the folk in the departments were very happiness. it

was very crowded.we went to the downtown to buy some presents for our

relatives,of course,i got a big present from my parents.it was a thing that i

wanted to get for a long time.you know,it was the festival,so all the

departments were saled their products in a low price. its cheap for us.all the

things you saw were perfect.i was very happy that i could go to shopping with my

parents. because i could get the present,and the most important reason is i

could go with my parents.

Iraq is a part of the Middle East next to Iran & Kuwait. It is very

important to the rest of the world because of its underground petroleum

fields.

It is said that oil is industrial blood and for this reason perhaps the war

started.

On September 11,2001,the Twin Towers in New York as well as parts of the

Pentagon were destroyed by an airplane planned by terrorists, which made George

Bush declared to fight the country’s enemies.It was said that Iraq still

possessed many weapons of mass destruction and weapon inspectors were sent to

the country by the UN to find the clues.Though no evidence was found, America

still wanted to go to war with Iraq and the main target is Sadam Hussein. The

war was just like the quiet battle between France and China in 1800s.It was said

that a relation of Sadam betrayed him.

I think war is not just a matter of two persons or two-family fight. It is

related to so many victims’ inrerests . As a leader, one must always think for

al

the people, so will his country be prosperous for always.

There is a saying that every family has its trouble. Indeed, no one can go

on well all the time. My parents have found the good way to educate us. Thus,

when there is conflict happening between the relatives, we obey the rules and

know what to do. My parents have set up many rules for me and my sister, which

works to solve problems. The first rule is to say thank you when we get help.

Such as when someone open the door for us, we also need to show gratitude. I

find people feel happy when I say thank you to them. The second rule is to never

get angry for more than two days. So when I have disputes with my sister, we

wont be mad at each other for long time. The family rules make me a better

person.

From Monday until Friday most people are busy working or studying, but in

the evenings and on weekends they are free to relax and enjoy themselves. Some

watch television or go to the movies; others participate in sports. It depends

on individual interests. There are many different ways to spend our spare

time.

Almost everyone has some kind of hobby. It may be anything from collecting

stamps to making model airplanes. Some hobbies are worth a lot of money; others

are valuable only to their owners.

I know a man who has a coin collection worth several thousand yuan. A short

time ago he bought a rare ten-yuan piece worth 250 yuan. He was very happy about

the purchase and thought the price was reasonable. On the other hand, my son

collects match boxes. He has almost 600 of them but I doubt if they are worth

any money. However, to my son they are extremely valuable. Nothing makes him

happier than to find a new match-box for his collection.

Thats what a hobby means, I guess. It is something we like to do in our

spare time simply for the fun of it. The value in money is not important, but

the pleasure it gives us is.

With the development of e-commerce, shopping online becomes a new way of shopping which is getting more and more popular. Many citizens are likely to shop through internet nowadays.

随着电子商务的发展，网上购物成为一种新的购物方式，越来越受欢迎。许多市民可能现在通过网上商店。

Generally speaking, shopping online offers lots of advantages with its convenience the most prominent. There are many commodities on the internet where you can search whatever you want. Besides, you just click the mouse can you get all information you want, so that you don’t have to go to the shop personally. In addtition, the commodities on the Internet is usually cheaper than the stores which can save much money.

一般来说，网上购物提供了方便，最突出的优点。网络上有很多的商品，在那里你可以搜索你想要的任何东西。此外，你只需点击一下鼠标就可以得到你想要的所有信息，所以你不必亲自去商店。另外，在互联网上的商品比能节省多少钱一般商店便宜。

However, everything has two sides. You can not see the products or check their qualities and some of the sellers on the Internet is not so honest. And, for those who enjoys shopping around different stores, shopping online perhaps will make them boring.

然而，任何事物都有两面性。你不能看到产品或检查他们的品质和互联网上的一些卖家不诚实。并且，对于那些喜欢在不同的商店购物，网上购物可能会让他们无聊。

In my opinion, shopping online has more advantages than disadvantages, and with the improvement of e-commerce, there will be more people to shop on the Internet.

在我看来，网上购物的利大于弊，而且随着电子商务的发展，将会有更多的人在网上购物。

I am a college student, this is my fourth year in the college, which means

that I will graduate soon. Nowadays, many of my classmates have taken the action

to find the job interview, while I tell myself to calm down, actually, I have no

idea about my future, so I haven’t taken the action.

When the graduate season comes, students have to worry about their jobs,

for me, I have many annoyances, first, I don’t know which city should I go. On

the one hand, I want to stay in the present city that I live, because I have

many college students here, I can fight my career with them, we can also take a

drink when we have time. But on the other hand, if I want to stay in this city,

it means I have to be far away from home. I want to stay with my family, my

parents want to see me and I want to accompany them, working at my hometown is a

perfect idea for me. Now I still don’t know how to choose, once I have made the

decision, I have to give up something.

Before I make the best choice for me, i won’t find the job interview.

When we judge a person, we are likely to think about whether he or she is

keeping promises, the person who always keeps his promises is popular, people

around him are willing to make friends with him. So keeping promises is very

important, we should never break our promises, or we will be abandoned by

others. First, we should never late for meeting or date. When we make a deal

with others to meet at some places, we shall be there in time or earlier, it is

rude to be late and let others wait for a long time. I hate my friends late for

meeting, though they have reasons, they could have been here in advance. Second,

we’d better think twice before making a promise, if we promise people, it means

we have ability to finish it, people are hold great hope on us, if we fail, how

disappoint it is. So we should measure ourselves before we making a promise.

As the world gets globalized, the communication between countries has been enhanced, studying abroad has become a dream for countless young students. As a college student who is majoring in English, I would like to keep my further study in a foreign county after graduation, so that I can improve my knowledge and my ability to live.

随着世界变得全球化，国家间的交流得到了加强，出国学习已经成为了无数青少年的梦想。作为一名学习英语专业的学生来说，我喜欢毕业后出国学习，这样我就可以提高我的知识和生活的能力。

As for me, learning English in a native speaking environment is very important. I would choose to continue my further study in Britain orAmerica, both are good for my major. The English-speaking countries can provide me a good chance for me to gain my knowledge. I can know more about the culture and conventions, it helps me to do some translation work.

对于我来说，在一个讲本土语言的国家学习英语很重要。我会选择在英语或者美国继续我的学业，这两个国家都对我的专业有好处。讲英语的国家能给我提供学习知识的好机会。我可以学到更多的文化和习俗，这有助于我做一些翻译方面的工作。

Overseas study would also provide a good opportunity to learn how to live by myself. In china, I have been living with my parents all my life, my mother takes care of me all the time, but now, I am an adult, it is time for me to be independent. I can learn how to communicate with others, how to take care of myself and so on. All these abilities are vital for my future career.

出国学习也能提供一个学习如何独立生活的好机会。在中国，我一直都和父母生活在一起，我的妈妈一直在照顾我，但是现在，我已经是一个成年人了，该是时候自立了。我可以学着如何与人交流，如何照顾自己等待。所有的这些能力对于我将来的职业很重要。

With the constant interaction between nations, it is necessary for us to learn more about the world. Studying abroad provides such chance, at the same time, we could also learn to be independent.

随着国家之间的交流日益频繁，更多的了解世界对我们来说是很必要地。出国留学提供了这样的机会，同时，我们也能学着自立。

Weibo, a microblogging, make a lot of people have a stage show ego, brought the world a "everybody can speak, everyone can be focused on" era.

Weibo, in just a few dozen words, it is impossible to make anyone on the microblogging opinion leaders, is as a news agency reporter, most will be an instant latest news with the least amount of words, with the fastest speed to tell someone. Weibo to personal network oriented real-time radio, through the way of cluster, everyone can form an own audience community. With micro blogs will be released to his personal views and opinions of the audience, with the most refined words to express the deep point of view. For example, a few days ago in wenzhou passing move car tracing cauda, "41 people and injured more than 200 people have taken to more than 200 hospitals, the death toll of 19 people identity." The latest news on weibo. "On the microblogging, 140 - word limit to civilians and Shakespeare to the same level." I also have a weibo, we that a few is also a primary school classmates together talk about learning or extracurricular activities, have unlimited fun. However, everything has advantages and deficiency.

Weibo is take the world toward a new era, but also to the future world for side wall. Weibo because some primary school students surf the Internet chat, so grades plummeted, eyesight also serious decline. They lie prone on the computer every day, because of the computer radiation caused the mind, insomnia, dry eyes wait for a symptom, bet on health to talk. You dont use health for happy, can chat weibo, but not too much.

微博——这个微博客，让很多人有了展现自我的舞台，为世界带来了一个“人人都能发声，人人都能被关注”的时代。

微博，短短几十个字，也不可能让任何人在微博客上成为意见领袖，最多就是如同一个通讯社记者那样，将一个最新的即时新闻用最少的言语，以最快的速度告诉别人。微博，以个人面向网络的即时广播，通过群聚的方式，每个人都可以形成一个自己的听众群落。用微博客的方式，将个人的见解和观点发布给自己的听众，以最精炼的词汇来表达最高深的观点。比如，前几天温州路过的一动车追尾，“41人死亡200多人伤已有200多人送往医院救治，死亡人数其中19人身份确认。”微博上发出了最新消息。 “在微博客上，140字的限制将平民和莎士比亚拉到了同一水平线上。”我也有一个微博，我们那几个同样是小学的同学会一起聊一聊学习或课外活动，有无限乐趣。但是，任何事物都有优与缺。

微博虽能带世界走向一个新的时代，但也能将未来世界给予壁端。有一些小学生因为天天上网聊微博，所以成绩一落千丈，视力也严重下降。他们天天趴在电脑旁，因电脑辐射引起了头脑发昏、失眠、干眼病等症状，赌上健康去聊微博。大家不要用健康换来开心，聊微博可以，但不要太过了。

I am Mary .My father is a teacher,and my mother is a teacher ,too. They think teacher is a good job. But they hope I can be a great scientist. I want to be a scientist. Because I can make our country strong. I am interested in science. I know it not easy to be a scientist. I often do morning exercise. I am doing my best to make my dream com ture.

My parents watched a lot of news and they always worry about my safety. I

tell them that there is no need to worry, because the news report about other

peoples story having nothing to do with me. But one thing changed my opinion.

One day, when I walked home after school, a young man who dressed so well got

close to me, then he told me that he needed help. He said he lost his wallet and

needed someone to give him 2 yuan to take the bus. I felt so sorry for him. I

should help him and the money he needed was little for me, so I gave the money

to him without hesitation. At night, I watched TV with my parents, the news

showed the new trick for the cheaters and it was the same situation with what I

experienced today. I realized I must take care.

What is honesty? Honesty means speaking the truth and being fair and

upright in act.Considered a virtue,it is admired in every country and every

culture.So,Is it necessary to be honest all the time .

However,there are people who try to get benefits by dishonest means.

For example,some students copy the exercises done by others or cheat in

examinations in order to get good marks. The same thing may be said of a

merchant who tries to get rich by deceving customers. Those people may succeed

for a time,but sooner or later,they will be caught.

How can cheating on exams be prevented? The measures may vary from case to

case.But I think,the students must first be well informes of the negative effect

on the learning atmosphere of the university and the studentscharacter. Then

the students who were caught in the act of cheating can be criticizedpublicly,

punished or even expelled from the university.

Everyone has their own habits, have a good habit, also have bad habits, we learn to complement each other.

But in our life, there are a lot of people have the bad habit of smoking, though they know the dangers of smoking to human body, but they are going to do, or really confusing.

In my side, though in many places with big slogan: no smoking, but there are still many people smoking unashamed. Although the cigarette case, all printed with the words, "smoking is harmful to health" but people turn a blind eye, to continue to their "hobby".

"Merchants if we know that smoking is harmful to health, why production cigarette?" I feel puzzled. Dont know who replied: "of course, because there are many people smoking, producing cigarette making money." I thought: if the country increased taxes, let the merchants cant make money, but at a loss, can reduce cigarette body is native to enjoy? The answer is yes. When the state is treated as "humen" cigarettes, smokers will be like those opium, become less and less, when it comes to cigarette harm people will be less and less.

The dangers of smoking, so I advise those smokers: only harm smoking, smoking just can satisfy what are a kind of desire, so youd better give up smoking as soon as possible.

每个人都有自己的习惯，有好习惯，也有坏习惯，我们要学会取长补短。

但在我们的生活中，有许多人有吸烟的坏习惯，虽然他们知道吸烟对人体的危害，但他们还是要去做，着实令人费解。

在我的身边，虽然在许多地方贴着大大的标语：禁止吸烟，但是还是有许多人毫无顾忌的吸烟。虽然在所有的香烟盒上，都印着“吸烟有害健康”的字样，但是人们视而不见，继续他们的“爱好”。

“商家既然知道‘吸烟有害健康’，为什么还要生产香烟呢?”我感到疑惑不解。不知是谁答道：“当然是因为吸烟的人多，生产香烟有钱赚咯。”我想：如果国家增加税，让商家赚不到钱，反而亏本，会不会减少香烟的身产于享受呢?答案是肯定的。当国家像“虎门销烟”一样来对待香烟，吸烟者一定会像吸食鸦片的人一样，变得越来越少，说到香烟危害的人也会越来越少。

吸烟的危害数不胜数，所以我奉劝那些吸烟者：吸烟只有害处，吸烟只是能满足呢们的一种欲望罢了，所以你们还是尽早把烟戒掉吧。

living in a big city英语作文(一)

Compared to last years statistics, this year more and more youngsters would like to launch a career in first-tier cities. There is no doubt that residing in big cities brings more chances to be hired and promoted. Futher benefits associated with big cities are higher income, indeed decent social status, and the most prevalent pastimes.

Virtually, each coin has two sides. There are also lots of disadvantages living in first-tier cities. With the explosive growth of house price and higher price of commodities,inevitably, you would burden more pressure living in big cities. Likewise, big city has a dense and large population. As a result, you may encounter vast crowds of people when you are out, and you have to wait in a long queues at the hospitals when you get ill as well.

In my points, only by discovering yourself and knowing whats your niche areas can you hope to lead a better life. As for fortune, as for fame, they are of no consequence just like floating clouds. Nothing is more significant than your own happiness.

living in a big city英语作文(二)

The city is the place where all industrial, cultural and educational centers are situated. In big cities you can find museums, theaters, clubs, cinemas, big shops and hospitals, comfortable modern flats.

People try to live in cites because all necessary objects are situated nearby. For example if you get ill a hospital or a chemists shop will be situated near your home in the city, and if you live in the country it will be hard to find any medical help very quickly.

Also in big cites you can find all sorts of entertainment such as cinemas, clubs entertaining parks and so on. Many people like to spend their free time there because it helps them to relax and bring them a lot of pleasure.

It is really convenient that everything you need in daily life is situated near you. One of the most important comforts of big cites is that you can quickly get everywhere you like by underground, bus, trolleybus. Also in big cities there is electricity therefore you can use electrical devices such as TV sets, computers, radio, microwave oven, refrigerators and so on.

One more thing, without which it would be impossible to live today is the telephone and where there is a telephone there is also Internet. The communication (связь) has huge value in the life of people and we have got used to it to such extent that if there is no telephone we feel uncomfortable and lonely.

Yes, it is really comfortable, and at first glance everything is good but nowadays big cites there are a great amount of cars and factories. Big cites suffer of overpopulation, dirty air, and water, The streets became noisy and after hardworking day people cannot relax.

People try to do everything to go to the countryside because only there they can find silence. Every holiday and every weekend people try to leave their houses and go to the country.

I live in … district. The ecological conditions here are very bad because near my house a lot of industrial objects are situated. For example near … factory is situated. As for me I prefer to live in a big city because a lot of big shops are situated near my home, but I also like to spend my holidays in the country because after living in the city for about 9 months I begin to get tired.

The Spring Festival is coming soon, I feel so excited, my parents will be home and get together with me. They are busy all the time and have less vacation, they told me that they would have 7 days off and promised to stay with me. I have made some plans for the coming festival and I can’t wait to carry them out.

春节很快就要到来了，我感到很兴奋，我的父母将会在家，和我呆在一起。他们一直都很忙，没有什么假期，他们告诉我们将会有一周的休假，并且承诺和我在一起。我已经为即将带来的春节制定了一些计划，迫不及待要执行。

At the eve of the Spring Festival, my parents decide to go back to my grandparents’ house, we will spend the important day together. It has been three years since we get united last time, I miss the happy atmosphere, we talked so happily. I also miss my grandparents’ food, it is so delicious, my grandma always knows how to satisfy my stomach.

在春节的前一天，我的父母打算回到祖父母的家里，我们会一起度过重要的一天。这离我们上次相聚已经有三年了，我很怀念那愉快的氛围，我们聊得很开心。我也怀念祖父母的食物，那很美味，我的祖母总是知道如何满足我的胃口。

I plan to go to the park with my parents, as they are busy all the time, so they want to play with me in this holiday. I can see the beautiful scenery and have a nice talk to my parents, we can challenge some game together.

我打算和我的父母一起去公园，由于他们总是一直很忙，因此他们想要在假期里和我一起玩耍。我可以看到美丽的风景，和父母愉快地聊聊天，我们也可以一起挑站游戏。

These are my plans, I think I will have a nice vacation with my family.

这就是我的计划，我觉得会和家人度过一个愉快的假期。

Recently, a beautiful womans pictures caught the publics attention. The

amazing thing was that the woman looked like 20 years old while actually she was

more than 40! A lot of girls wanted to know how she could make it. The woman

told people that besides regular exercise, the most important thing was to keep

a good mood. When something or someone annoyed her, she tried to find the

balance and solved the problems step by step. She felt so thankful to her

families and friends, who supported her all the time. So there was nothing could

make her sad for a long time. People are easy to lose control when they meet

difficulty, then they start to complain and feel negative about life. In the

long time, it is easy to age, even they are young. We need to find the way to

relieve bad emotion and to enjoy life.

2020高二经典英语作文5

There have been a lot of ways of acquiring knowledge. And the number is

increasing unexpectedly owing to the popularization of modern mass media.

However, reading books has always been the major and convenient approach to

knowledge. One may acquire most of his knowledge through reading books, since

they can be carried easily and read leisurely everywhere at any time. Another

equally important means of acquiring knowledge is through practice, especially

learning from others. It is unlikely for a person to get all-round knowledge by

merely reading books. As a matter of fact, genuine knowledge comes from

practice.

Although books and practice are indispensable to the enrichment of one’s

knowledge, other means shouldn’t be turned aside. With the development of IT

industry, people tend to hunt for knowledge by means of Internet. Internet is

changing people’s traditional approaches to knowledge. It has found its way into

every field of the world.

Smoke has something for people in poor health, nicotine.

Nicotine in a cigarette can kill a mouse, 25 g of nicotine in cigarettes can kill a few cows, 40 to 60 mg of pure nicotine can kill a person.

The dangers of nicotine is also quite big, it can cause stomach or other stomach disease; Also can make the person causes heart disease cause rhythm of the heart is not straight; The outbreak of serious still can cause cancer.

Cigarettes are hidden in the invisible killer, around us are all should be vigilant.

According to scientists, the chemical composition of tobacco contains hundreds of complex, most harmful to human body, including tar, nicotine, phenols, alcohols, acids, aldehyde is 40 kinds of toxic and carcinogenic substance. Smoke after the fire, smoke, contains the chemical composition of tobacco in all, at the same time than the tobacco itself and added some harmful substances, such as carbon monoxide, tobacco tar and so on. This is because in addition to the tobacco itself, in the process of cigarette made, to add some cocoa in raw materials, liquorice, sugar, glycerin, such as ethylene glycol, moist, taste fragrance and combustion-supporting material. Although these additive itself is harmless, but changed in the process of combustion. For example, in the back of the rat with cocoa after burning smoke oil, can grow skin tumor. Glycyrrhizic acid in glycyrrhiza after burning, with other ingredients, can generate have carcinogenic polycyclic aromatic hydrocarbons. Sugar increased after combustion with tobacco tar, and the product of sugar after combustion is an important carcinogens in tobacco. Glycerin and glycol after the burning of the material, not only can make smokers bladder cancer, and the acrolein inhibits the trachea and cilia secretion from the lungs, thereby increase the chances of suffering from bronchitis and emphysema, and make people with both became seriously ill.

Smoke harm to people is how great! So we cant smoke. Stop smoking, the benefit of future generations.

烟里有一种对人身体不好的东西——尼古丁。

一枝香烟中的尼古丁可以毒死一只小白鼠，25g的香烟里的尼古丁可 毒死几头牛，40至60毫克纯尼古丁可以毒死一个人。

尼古丁的危害也是相当的大，它可以引起胃痛或其它胃病;还会使人引起心律不正诱发心脏病;严重的还可能引起癌症的爆发。

香烟是隐藏在我们身边的隐形杀手，是大家所应警惕的。

据科学家测定，烟草中含有数百种复杂的化学成分，大部分对人体有害，其中焦油、尼古丁、酚类、醇类、酸类、醛类等40种是有毒和有致癌作用的物质。烟在点燃后，所产生的烟雾，包含了烟草中所有的化学成分，同时比烟草本身又增加了一些有害物质，如一氧化碳和烟焦油等。这是因为除烟草本身外，在制成卷烟的过程中，要在原料中加入一些可可、甘草、糖、甘油、乙二醇等调味、湿润、产香、助燃物质。这些添加剂虽然本身无害，但在燃烧过程中却起了变化。例如，在鼠背涂上可可燃烧后产生的烟油，可长出皮肤瘤。甘草中的甘草酸在燃烧后，与其他成分化合，可生成有致癌作用的多环芳烃。糖与烟草一起燃烧后增加了焦油量，而糖燃烧后的产物是烟中的一个重要致癌物。甘油和乙二醇在燃烧后的物质，不但可能使吸烟者患膀胱癌，而且所产生的丙烯醛可抑制气管和纤毛分泌物从肺内排出，从而增加患气管炎和肺气肿的机会，并使患有这两种病的人病情加重。

烟对人的危害是多么大啊!所以我们不能吸烟。杜绝吸烟，造福后人。