The most exciting storms are the ones with flashes of lightning.Unfortunately,those are scarce,unless you are near the Catatumbo River in Northwestern Venezuela.Here,nature's grandest sound and light show is often seen, because it happens about 160 nights a year.And it lasts for as long as 10 hours at a time.And unlike other lightning storms that cause just one or two flashes,this one is with as many as 280 per hour.It is the highest in the world. Besides,each one of them is so powerful that each can power every light bulb in South America.Not surprisingly,they can be seen for almost 250 miles.Fishermen and sailors often use them to guide them across the waters during dark nights.

    What's even more surprising is that the lightning has been happening above the same spot where the Catatumbo River meets Lake Maracaibo for thousands of years.The best part is that the show is different every night.That's because the color of the lightning changes,depending on the amount of water in the atmosphere.On dry nights,the lightning appears white.When the air is not dry,it helps split up the bright light into red,orange and even purple.

    Strangely enough,though this has been going on for centuries,scientists have still not been able to figure out the cause of this phenomenon.Some say that the storms are the result of the interaction of the area's unusual topography（地貌）,wind and heat.Others,however,believe that the storms are caused by a kind of gas in the area.The locals simply think that it is the "spirit of Catatumbo" that lights up the night sky.

How to teach a child to respect

    As a child grows out of being an infant and begins to notice and react to the world around him, you may find yourself wondering how you possibly impart all of the things that he needs to become a responsible, respectful adult.{#blank#}1{#/blank#} A child who learns to respect all he meets not only receives respect from others, but also learns to respect himself as well.

●Show your child respect. This is perhaps the best way to teach your child how to respect others. Listen to your child by giving him your full attention and he will learn to listen to you, understanding how important this is in communication.

●{#blank#}2{#/blank#} The more you say “please” and “thank you” to your child, the more likely he will learn to use them with you and others. Politeness then becomes a normal part of any conversation.

●Agree to disagree.{#blank#}3{#/blank#} Explain your decision so that he will understand your reasoning and expect respectful responses. Disagreeing with you doesn't equate to disobedience.

●Control your impulse to overact. When a situation arises between you and your child that requires calmness, keep in mind that you are supposed to be modeling correct behavior. {#blank#}4{#/blank#}

●Praise, praise, praise! So much is focused on what a child does wrong and how to correct it that the accomplishments are not celebrated enough.{#blank#}5{#/blank#}

A．Teach manners by using polite requests and responses.

B．Try to remember that a child won't always agree with you.

C．Respect is necessary for a meaningful and successful life.

D．If he sees you lose temper, he is more likely to respond that way in future.

E．A child may act like he pleases, but will respect being given limits.

F．When you see your child exhibit respectful behavior, make sure he knows just how proud you are of him.

G．Setting a good example is the best way to start a child on the path to respect.

    “Have a nice day!” may be a pleasant gesture or a meaningless expression. When my friend Maxie says “Have a nice day!” with a smile, I know she sincerely cares about what happens to me. I feel loved and secure since another person cares about me and wishes me well.

    “Have a nice day. Next!” This version(版本) of the expression is spoken by a salesgirl at the supermarket who is rushing me and my groceries out the door. The words come out in the same tone with a fixed procedure. They are spoken at me, not to me. Obviously, the concern for my day and everyone else's is the management's attempt to increase business.

    The expression is one of those behaviors that help people get along with each other. Sometimes it indicates the end of a meeting. As soon as you hear it, you know the meeting is at an end. Sometimes the expression saves us when we don't know what to say. “Oh, you just had a tooth out? I'm terribly sorry, but have a nice day.”

    The expression can be pleasant. If a stranger says “Have a nice day” to you, you may find it heart-warming because someone you don't know has tried to be nice to you.

    Although the use of the expression is an insincere, meaningless social custom at times, there is nothing wrong with the sentence except that others who speak it without thinking may not really care about my day. But in a strange and comfortable way, it's nice to know they care enough to pretend they care when they really don't care all that much. While the expression may not often be sincere, it is always spoken. The point is that people say it all the time when they like.

    Argentina in the late nineteenth century was an exciting place. Around 1870, it was experiencing an economic(经济的)boom, and the capital, Buenos Aires, attracted many people. Farmers, as well as a flood of foreigners from Spain and Italy, came to Buenos Aires seeking jobs. These jobs didn′t pay well, and the people felt lonely and disappointed with their new life in the city. As the unhappy newcomers mixed together in the poor parts of the city, the dance known an the tango(探戈舞)came into being.

    At the beginning the tango was a dance of the lower classes. It was danced in the bars and streets. At that time there many fewer women than men, so if a man didn′t want to be left out, his only choice was to dance with another man so that he could attract the attention of the few available women. Gradually, the dance spread into the upper classes of Argentinean society and became more respectable.

    In Europe at this time, strong interest in dance from around the world was beginning.

    The interest in international dance was especially evident in Paris. Every kind of dance from ballet(芭蕾舞)to belly dancing could be found on the stages of the Paris theaters of the Paris theaters. After tango dances from Argentina arrive in Europe, they began to draw the interest of the public an they performed their exiting dance in cafes, Though not everyone approved of the new dance, saying it was a little too shocking, the dance did find enough supporters to make it popular.

    The popularity（流行）Of the tango continued to grow in many other parts of the world. Soldiers who returned to the United States from World War I brought the tango to North America, It reached Japan in 1926, and in 2003 the Argentinean embassy in Seoul hired a local tango dancer to act an a kind of dance ambassador, and promote tango dancing throughout South Korea.

    Awarding wining film Ballad From Tibet(《天籁梦想》) by Chinese director Zhang Wei is scheduled to premiere in New York City on Saturday, March 10.

    The film, which tells the story of four visually impaired kids from China's Tibet autonomous region embarking on a journey for their dreams, will be presented at the Bronx Library Center on Saturday, at Mid-Manhattan Library on Sunday, at Lehman College and Marlene Meyerson JCC Manhattan on Tuesday, and at the Museum of Modern Art on Wednesday.

    Based on a true story, Ballad from Tibet is about the four 1ibetan kids—Thupten, Sonam, Kelsang and Droma—achieving their dreams against all odds.

    Thupten is a 10-year-old boy partially sighted in one eye and blind in the other. His doctor says that there is a chance he could completely lose his sight, but there is an operation that could offer a 50 percent chance of saving his vision.

    His teacher firmly suggests that he should have the operation right away, but Thupten is afraid and wants to see the world before his life is plunged into total darkness.

    Along with his three friends who also suffer from blindness, Thupten embarks on an exciting adventure. Together they decide to go to Shenzhen in South China's Guangdong province, a city more than 37,000 km away from Tibetan regional capital Lhasa.

    The reason for the children's decision to go to Shenzhen is their love of music. They are all talented and want to sing their hearts out in front of national audience by participating in a Shenzhen-based reality show.

    The foursome's trip is indeed fun, but also turns out to be dangerous as well. Luckily, help is on hand along the way in the form of a wandering family, a shepherd, a motorcycle club, and a TV producer's assistant.

    Ballad From Tibet has won the award for Best Children's Feature at the 13th China International Children's Film Festival in November 2017, and earned nominations at 17 different international children's film festivals in Germany, Canada, Japan, Greece, Australia and India.

    What if we could replace oil with a fuel which produced no pollution and which everybody had equal access to? The good news is that we can, in fact, we are swimming in it -literally.

    Hydrogen is one of the building blocks of the universe. Our own sun is basically, a big，dense cloud of the stuff. And hydrogen can be used to create electricity for power, heat and light.

    The problem is that hydrogen is everywhere and nowhere at the same time. It does not exist as a material on its own, but is always part of something else. So it has to be separated before it can be used.

    Most commercial hydrogen in use now is created from natural gas. As oil will start to run out in around the year 2030. It makes sense to produce as much hydrogen as possi­ble as soon as we can. But natural gas supplies will also begin to run out soon after. Another source is needed.

    Researchers are now using electricity to make water into hydrogen. Companies are working on the problem in their own areas. The first commercial hydrogen "fuel cells" for computers and mobile phones have already come on to the market Auto companies have also invested over US $2 billion in the production of hydrogen fuelled cars.

    The nations of a hydrogen fuelled planet would not fight over energy recourses. There would be a great reduction in pollution, the only by-product of creating hydrogen is pure drinking water something that is very scarce in many parts of the world. But that is not where the good news ends, once the costs of producing hydrogen have been brought down, it will possibly provide power for a third of the Earth's popula­tion that has no electricity.

    And electricity creates wealth. In South Africa over the last decade there has been a large programmer of electrification. Thanks to the programmer, people do not have to spend their days looking firewood to burn for heat and with electric light, they can work long into the night

Some scientists see radical changes in the way the human race co-operates. Hydrogen creates electricity, and is also created by it. With dual use fuel cells, everyone who consumes energy could also produce it. Late at night, a man drives home in London and connects his car into the "worldwide hydrogen web", which it supplies with electricity. A few hours later, a man in Beijing uses that electricity to power the hydrogen cell in his car. Hydrogen could be the first democratic energy source.

    Like all dreams of the future, it seems very far away. But the threat of war and terrorism in the Middle East has made governments and businesses more aware of the need to end oil dependency and spend more time and money on hy­drogen resource. So maybe the threat of war is not a completely bad thing for the future of the human race.