The electric eel is an amazing storage battery. It can seed a jolt of as much as eight hundred volts of electricity through the water in which it live. ( An electric house current is only one hundred twenty volts.) As many as four-fifths of all the cells in the electric eel's body are specialized for generating electricity, and the strength of the shock it can deliver corresponds roughly to length of its body.
Yet, people began to understand how electricity works only a little more than two centuries ago. Nature has apparently been experimenting in this field for million of years. Scientists are discovering more and more that the living world may hold many interesting secrets of electricity that could benefit humanity.
All living cell send out tiny pulses of electricity. As the heart beats, it sends out pulses of record; they form an electrocardiogram, which a doctor can study to determine how well the heart is working. The brain, too, sends out brain waves of electricity, which can be recorded in an electroencephalogram. The electric currents generated by most living cells are extremely small - often so small that sensitive instruments mbt shoes are needed to record them. But in some animals, certain muscle cells have become so specialized as electrical generators that they do not work as muscle cells at all. When large numbers of these cell are linked together, the effects can be astonishing.
The modern age is an age of electricity. People are so used to electric lights, radio, televisions, and telephones that it is hard to imagine what life would be like without them. When there is a power failure, people grope about in flickering candlelight, cars hesitate in the streets because there are no traffic lights to guide them, and food spoils in silent refrigerators.
04/24/2010
Electricity
04/22/2010
The Return of Hong Kong
June 30th, 1997 Monday Fine
On the stroke of midnight, as July 1st, 1997 begins, the exciting moment is coming -- Hong Kong will return. Now the whole nation is in jubilation. All my family sat in front of TV to watch the Hong Kong handover ceremony. Seeing the Chinese national flag rising and Chinese president making a speech, I was deeply moved in mbt shoes.
As is well known, Hong Kong was originally a part of China in history.After the Opium War, the British imperialists stole it from the corrupt Qing government and made it a colony of Britain. But from now on Hong Kong will no longer be a colony but "a Special Administrative Region" (SAR) of the People＇s Republic of China. Its return owes to our powerful country.She is becoming politically and economically powerful day by day. I＇m determined to study hard and make contributions to our country＇s development in the future.
04/20/2010
Smoking is Harmful
It has been estimated that smokers have made up half of the population in China. And the smokers are becoming younger and younger, even ineluding some middle school students.Nowadays more and more people have realized smoking can do harm to people＇shealth. However, some people still enjoy smoking. Why? Because some of them think it is a kind of fashion, some think it is of great fun and others, think that smoking can refresh themselves.In fact, smoking is a bad habit. It can cause a lot of diseases. Meanwhile smoking is a waste of money. Besides, careless smokers may cause dangerous fires.Smoking is harmful and it is not only bad for smokers themselves, but also bad for non-smokers.Therefore, I hope all the smokers can give up smoking for themselves and also for the people around them.
It is said that there are about half of people in China are smoking.Many young boys and girls have the habit of smoking, though they are middle school students like mbt shoes.As we all know, smoking does great harm to human beings. More and more people have come to realize how serious this problem is. But they are never bored with it. Some people think it is a kind of fashion, some think it is of great fun and others think that smoking can refresh themselves.Smoking causes many illnesses. A lot of people always cough because of smoking. The most serious illness caused by smoking is lung cancer. Meanwhile smoking is a waste of money. Besides, careless smokers may cause dangerous fires.
In order to keep healthy, we should get rid of the bad habit of smoking. Please stop smoking at once.
Summer Camp
On Saturday, we went camping, with our teachers. First we pitched the tent. then our older brothers and older sisters played game with us. At noon, we all had a delicious lunch followed by a barbecue for dinner. At night, we had bonfire and sang and danced. We didn’t sleep until 10:20 at night. But some of the boys were so noisy we couldn＇t fall alseep. I only slept for three hours. the next morning, everybody woke up very early. After exercising in the morning, we all went to see the small pigs. On the way there, we saw a lot of geese. At 10:00, we went back to eat ice cream. It was so cold. then, we all played games together. We ate lunch at 12:00. In the afternoon, we played musical instruments and sang. After that, camp was over. We had a lot of fun at the summer camp. I am looking forward mbt shoes going to another summer camp soon.
04/19/2010
We have only one globe
Don't you see the heavy smokes from the big chimneys? Don't you smell the gas from the motors all around the streets? We've got much dirtier air! the iceburgs are melting from the warmer winter because of the air pollution!
Don't you see there are less lives in the water? Don't you see mbt shoes that we must pay higher cost in water processing? We've got much darker water running around! the oceans are in GREat danger.
Don't you see the montains getting bald? Don't you see our ground becoming hollow? We've been exhausting the resources beneath the earth. Our grandchildren will live on nothing.
We have only one globe. Treasure the mother nature!
You are not alone
Before the coming of 2012,the drought of china is coming,in the southwest of china,millions of people suffer frome drought,and it is said that this situation has not happened for nearly 60 years.and fortunately,the goverment has taken many measures to protect the suffering people ,as you can see,the water is the problem.so to dig up wells is necesary.so soldiers are coming,they go to the place where motherland needs help.they divote their lifes just for the contry.and at this time,i can see the people from community about mbt shoes ,not hesitate to give their hands to the southwestern people.
I pray to god,i thank all the caring people,it is you let our world filled with love.
The people of the southwest,you are not alone.
04/18/2010
Snakes
The snake is a long and thin animal that lives in grass or other dark places. A snake has no legs or feet, but it can move very fast on its stomach. Snakes usually have green, yellow or black skins, which make them difficult for their enemies to find them. Some kinds of snakes live in water. They can swim as freely as fish.
Snakes are cold-blooded animals. In winter they hibernatein holes which are narrow enough only to hold the snakes' bodies. The snakes can sleep through a whole winter without eating and moving. They can not feel any pain. The hibernation period lasts about five months. When spring comes, the snakes come out and begin their normal life.
Snakes can take many things as food, such as mice, sparrows, frogs,birds' eggs, pests and so on. People sometimes can see a snake eat a sparrow. First it moves close to the sparrow, then it puts out its tongue and brings the sparrow into its mouth and swallows it, which makes a lump in the snake's body. After some time the lump disappears.
As snakes are dreadful-looking, people are afraid of them. Many people drive them away whenever they see snakes. But in Chinese fairy tales, snakes are by no means bad. They seem to have human feelings. They can change into pretty girls. People like mbt shoes and respect them. The most well-known is the story about the White Snake and the Blue Snake.
In fact, snakes are not as dreadful as they look. They can help us to kill mice and pests. They can provide us with delicious meat. Their blood is a good drink. Poisonous snakes are especially useful. We can make valuable drugs with them.
04/16/2010
Learn from Steven Spielberg
After reading the text “Getting to Know Steven Spielberg”, I know that Steven Spielberg is a world-famous and productive director, producer and writer.
What has impressed me most is Steven Spielberg’s spirit of hard work. Spielberg had his own dream of going to the Film Academy when he was young love mbt shoes. Before reading the text, I had almost nothing to do at school all the day. I disliked studying because I found studying difficult, so I made little progress. Now I have made up my mind to learn from Steven Spielberg, especially his spirit of hard work. It will certainly encourage me to work harder so that I can become a good student in the near future. It was Steven Spielberg who let me know that working hard and believing in yourself will make your dreams come true. I’ll try my best to make it. There is a saying, “Where there is a will, there is a way.”
The colors of seasons
If seasons have colors, what are the four seasons like?
If seasons have colors, spring is green. When spring comes, willow trees begin to bud. It is really a
green world, and it is also the color of hope.
What about summer? When I look at flowers of almost all kinds in blossom, I understand that the color of
summer is red.
Compared with summer, autumn is another kind of color. The rice in the fields and fruits on the branches
are the signals of autumn. It is the color filled with ripeness. Gold is the symbol of harvest.
Winter is the world of snow. The whole land is covered with snow. White is the color of winter.
Seasons have colors and the changing of the four seasons makes the land colorful and energetic.
04/15/2010
Harmfulness of Fake Commodities
As national economy develops for the better, fake commodities prevail in many places of our country. Some profiteers, regardless of people’s interests, can’t wait to make a fortune, so that they just take risks making and selling fake goods. On the other hand, the punishment is not severe enough to stop the violators. Today’s market, therefore, is swarming with fake commodities such as food-stuff, clothing and medicine. From Joozone.com.Fake commodities are extremely harmful to consumers as well as to the whole society. Take, for example, the 1998 fatal alcohol poisoning case in Shanxi Province of Northern China. By adding methanol to water, a peasant produced“alcohol”, dreaming of becoming rich overnight. The incident, with 27 people killed and around 700 poisoned, caused great sufferings to the victims and shocked the whole country as well. A carry-over of fear left thousands of others in confusion and panic: they no longer had a sense of safety. How terrible a case it was! It’s really high time we took measures to crack down on the production and sale of fake commodities.
