According to a new survey, students' safety has become a big problem. Nearly 50% of students say they are worried about robbery on the way to and from school. Now in main big cities in China, some schools have taught an unusual lesson: self-protection. Students like this lesson because there are no exams or boring classes. And they can learn how to save lives and know how to stop danger before it really happens.

      Chen Haoyu, a teacher at Beijing No. 25 Middle School, gives young students advice on how to deal with danger.

★If you are robbed

     Keep calm. lf you can not cry for help or run away. Give the robber your money. Try to remember what the robber looks like and tell the police later.

★If you are in a traffic accident

     If a car hits you. You should remember the car number. If it is a bicycle, try to call your parents before you let the rider go. This is because you don't know how seriously you are hurt

★If it is raining hard and there is lighting

    Don't stay in high places and stay away from trees.

★When there is a fire

    Get away as fast as yon can. Put wet things on your body and try to find an exit. Do not take the lift.

★If someone is drowning

     If you can't swim, don't get into the water. Cry out for help.

      Remember that danger is never as far away as you think. Take care of yourself at all time!

    Recently, a designer in Hong Kong has invented a special book that can transform (变形) into a piece of furniture. The special book is called Bookniture. It can be unfolded to become a chair or a small table. People can either carry it around for a portable (轻便的) chair or can store it in their homes to use as extra furniture.

    The book was designed by Mike Mak. He came up with the idea after never having enough seats for his friends in his home in Hong Kong.

    “I love having friends at my place, but I have never had enough seats for everyone—we would always end up with just sitting on the floor. 1 really want a seat that doesn't take up any floor space when I don't need it. One day, the empty space on my bookcase drew my attention.  Then came the new idea—Bookniture, furniture hidden in a book,” said the 30-year-old designer.

    Made from fully-recyclable kraft paper (牛皮纸) , the book measures 33 cm by 18 cm. It expands (扩大) to 14 times bigger once it's opened, and can support up 10 1,000 kg of weight.  It comes in two colors, brown and black, and can be bought for between￡55 and ￡57.

    Technology is developing fast and it has become an important part of our life. Then what will the world be like in the future?

    3—D food will be both delicious and nutritious(有营养的). We can use 3—D printers to print some basic materials.    ①    And we can go further. Scientists belive that we just need to turn on a printer in the kitchen and then we can enjoy our favourite food whenever we like.

         ②      5G network will allow many more people to get information. Big companies like China Mobile and China Unicom will start to offer 5G. It is said that promises download speeds 10 to 20 times faster than 4G. For example, we can download a film within just 1 second. But with a 4G network, it takes a few minutes. There will be much bandwidth (带宽) and we can get unlimited (无限的) information.

    Underwater cities will provide more space. The earth is becoming more and more crowded. We may turn to underwater homes, which will be built as low as 15 of the sea can be used to provide power for the homes.

         ③      For us common people on the earth, the dream of travelling around space will come true. In the coming years, spacecraft will be as popular as buses, trains and planes. We can leave our home and enter space to take an adventure (冒险). And even we will get used to living there.

    A robot will be a part of life.  Robots can do many of the same things as we humans do like driving cars. But they will be used in other areas as well. They will be able to think. They can tell the difference between right and wrong. They can feel       ④        In a word, just as Jules Verne said, "Anything one man can imagine, other men can make real."

    Football is so popular in China. Almost everyone is interested in this sport—the young and the old, boys and girls, and now even robots.

Recently at Hangzhou Guangming Middle School, kids from several schools played football with their robots.

    Robot football is very different from human football. Only two robots play in each match. The field is as big as a ping pong table. One half is black and the other is white. Each robot tries to catch the "football" and score a goal. The robot with more goals wins.

    Gao Linge, a boy from Hangzhou Guangming Middle School, helped make one of the robots for the match.

    "My school bought the main board (主板),"said Gao, 14. "Then I decided what my robot looked like and made a computer program for it."

    Gao's robot was eight centimeters tall and had two arms. It had four sensors (传感器) to "see" and "kick" the "football".

    Ying Xuehai, a 12-year-old student from Gao's school, also made a robot. His robot played against Gao's. The match decided who would go to the final game. Ying lost the game. So he gave many of his robot's parts to Gao.

    Even so, Gao's robot didn't win the final. It played well in the first five minutes. Then it slowed down. By the end of the match, it could hardly move. What was wrong? Gao and Ying found the problem—the robot ran out of batteries (电池)!

    "We'll solve the problem and beat the other schools next time!" said the two boys.