初中说明文范文(精选六篇)思维导图

According to one of my teachers who graduated from university in 1983, his college expenses were only about 20 yuans per month, covering everything, such as food, and daily necessities. About twenty years later, the expenses of college students are dizzily/staggeringly high and growing more so every year. The basic average cost per student at public universities is now estimated at 15,000 yuans or more, including all the expenses for food, tuition, accommodations, bills for communications and fare for transportation, and other fees. The public universities having the benefits of receiving government investment in higher education are charging students high, to say nothing of the private universities which run on their own capacity.

Take myself as an example. At the beginning of this term, I was charged more than 6,500 yuans for the tuition of the academic year, plus 300 yuans per month for my dormitory accommodation, 500 yuans for the expenses on food, clothes and trivial items, 50 yuans for my mobile phone, etc. Every year, the expenditure totals as much as 20,000 yuans, which has eaten into almost half of my parents’ annual incomes.

Because going to college is so expensive today, many students have to drop out and go to work early, while others take part-time jobs to earn some money in order to lighten their parents’ financial burden. I am really keen on the experience in attending the universities and I have acquired a lot of knowledge since I came to this university. I am grateful to my parents who work hard and live thriftily to support me. Because of this, I am not only very careful in spending money, but also studying hard to live up to my parents’ expectation. Someday, I can say to them that every penny they have spent on my study is worthwhile and will be paid off.

(举例法说明文)

说明文是一种以说明为主要表达方式的文章体裁。对客观事物做出说明或对抽象事理的阐释，使人们对事物的形态、构造、性质、种类、成因、功能、关系或对事理的概念、特点、来源、演变、异同等能有科学的认识，说明文的中心鲜明突出，文章具有科学性，条理性，严谨性，语言确切生动。它通过揭示概念来说明事物特征、本质及其规律性。说明文一般介绍事物的形状、构造、类别、关系、功能，解释事物的原理、含义、特点、演变等。说明文实用性很强，它包括广告、说明书、提要、提示、规则、章程、解说词等。说明文有的是以时间为序，有的是以空间为序；有的由现象写到本质，有的由主写到次；有的按工艺流程顺序来说明，有的按事物的性质、功用、原理等顺序来说明。

Mr David came to China, for the second time, this spring. During his stay in China, he visited several cities.

In Beijing he visited the Great Well, and the next day he left for Nanjing by train, where he visited the Nanjing Changjiang River Bridge. After that he travelled to Hangzhou by air and went sight-seeing on the West Lake. Then he got to Guangzhou by train and gave a report on American English. Later he went to Shanghai by sea, and bought over ten books in Chinese. After two weeks, Mr David returned to Beijing by plane.

With the harsh competition in today's society, more and more peoplecomplain about their stress in their daily life. Stress mainly comes from ourwork, study and families. When we feel stressed, we often have bad moods on theday and can't sleep well at night. That's too bad for our health.

To help easestress, some good ways are suggested. Firstly, we can chat with our parents andfriends. Maybe they can give us some good advice. Secondly, we ought to do someexercise, which can help us have a nice sleep at night.

Moreover, we aresupposed to balance our life with more outdoor activities, so as to make ourlife more colorful and vivid.

"Cough! As soon as I pushed open the kitchen door, I felt a sense of suffocation. Looking at the smoky room, I shrugged my shoulders and said, "dad, you're smoking again!"

To be honest, I now have a strange fear of the word "smoke", but I have nothing to do with my dad. Although father does not often smoke, but the accumulation is much, smoking sooner or later will bring him harm! I really wonder, "smoking is harmful to health" this sentence is well known, even on cigarette packets such clues, but why everybody "stack" tiger, race "? Even if you don't think for yourself, think for others. Don't you know the dangers of secondhand smoke? Smoking is a harm to others.

In order to awaken my father, I looked up the information and said:

"Tobacco smoke contains at least three kinds of dangerous chemicals, tar, nicotine and carbon monoxide, tar is made up of several kinds of material blending material, will be condensed into a viscous material in the lungs. Smoked cigarettes, are addictive, smoked also want to suck. Tobacco combustion will produce large amounts of toxic substances, such as nicotine, carbon monoxide, tar and other harmful substances such as tar, carbon monoxide, nicotine and other harmful substances. They can cause nausea, dizziness, headache, you make our work efficiency to reduce. Nicotine just 10 seconds can be into your brain and make your heart beat faster, increase your risk of heart disease, at the same time make you cause withdrawal symptoms when you don't smoke. These substances in cigarettes not only can cause sore throat, bronchitis, and has a carcinogenic effect."

Let's take a look at how smoking affects our daily lives. Smoking is a drug addiction. Why don't you open your sleepy eyes and see the truth? In addition, secondhand smoke is more dangerous than smoking:

"According to the experimental results show that secondhand smoke affect to the body similar to smokers. For example: a themselves don't smoke, but the spouse smokers lung cancer .com incidence of a disease, a 20% increase in" 50%, life of innocent people in the secondhand smoke the cigar smoke, it attains the disease rate is 20% "30%. Certain people, such as women, because of the passive secondhand tobacco smoke the disease death is almost equal to smokers, 20xx, forty-eight thousand four hundred Chinese women lung cancer and ischemic heart disease deaths caused by exposure to secondhand smoke, and smoking causes the disease death for the initiative to forty-seven thousand three hundred the number of Chinese women. Smoking among men in the same year, one hundred and thirty-seven thousand people died of lung cancer and one hundred and ninety-one thousand people died in ischemic heart disease."

Please take a closer look at these amazing figures. When I saw that, heart is does it one brace up, and then is full "smoke, smoke, smoke," I thought: if you still love your family, also care of your health, please put out hands are burning cigarette, when cannot help to myself.

May 31 is world no tobacco day, I wish every day is no tobacco day, so we can be called "smoke-free society". Let us cherish life and stay away from cigarettes.

Write an expository essay on the problems man will be faced with in the new century.

In the new century, human beings will be filled with hope and live more advanced life. What used to be depicted in science fictions can be the reality of the near future. However, man will also have to confront with some problems that will curtail(剥夺)human beings of their existence.

First of all, pollution of all forms such as land pollution, noise pollution, air pollution and water pollution are worsening with each passing day. People complain all over the world that it is becoming harder to breathe and water is turning undrinkable. Also forests are being felled at a very fast rate. The pollutions are getting so terrible that in some countries we can’t find clean and clear rivers and white clouds in the sky! When the children draw a picture of their surroundings, they paint the green trees in gray, the red sun in gray, everything in gray, and they can’t find a pure environment except in the books.

Additionally, the explosion of population in some parts of the world is manifesting its terrible results. Human beings wil1 have outgrown the earth’s resources, and people will run a high risk of starvation and diseases resulting from overcrowding. In due course, man would be forced out of the earth if the present trend were not reversed.

What is more, in the past century we had many disastrous wars. But there is still potential that the atomic bomb will be used by some politicians in order to keep regional hegemony. If it should happen, the exp1osion could easily lead to the destruction of civilization.

More seriously, the depersonalization of human relationships and the weakening of spiritual values are aggravating due to the stress caused by the busy schedules and the extreme pursuit of money. This will further contribute to man’s isolation and loneliness.

Apparently, with all these problems facing human beings, it seems to be overwhelmingly urgent to conquer them one by one because we have only one earth and it is our home. In the new century, we must try our best to heal the world and make it a better place for you, for me and for the children who will come to this world.

(举例法说明文)

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