It's 2320 now, and it will be 300 years in 2020. Now technology is very developed. Many dreams in 2020 have come true at this time, such as maglev trains and jet packs ... all of them have become common things, but technology is constantly improving and developing. Now scientists are not satisfied with the status quo at all, and are bent on studying more high-tech projects. No, this year, a high-tech product was born. This is a trackless train. As the name implies, it is a kind of train that does not need tracks. Each carriage can be combined at will, and together it is a train. When it is taken apart, it can be used as a car. It can be suspended in the air like a maglev train, which can be high or low, but it is not as high and fast as a maglev train. The most important thing is that it uses clean energy, and there are solar panels on the top of the carriage, which can convert the brightness of sunlight into electricity.

As soon as this kind of train is invented, it may affect students. What students are most afraid of when they go to school is traffic jams. In case of traffic jam, they may be late. With this tram, you will be late? It doesn't exist. There are no road restrictions, this train can fly high or low, and it will go around where it is blocked. Besides, this train is very fast, and it can get to school in five or six minutes. What's the harm of leaving half an hour early and being stuck in traffic for more than ten minutes?

If you have, traveling is a convenience. Traveling can save a lot of time on the road, and you can also drive your own train for a walk-and-go trip.

Say goodbye to the future and return to reality. Imagination is a vision for the future. If you want to make your imagination come true, you must make efforts.

2. The composition of Unit 5 in the second volume of the sixth grade is 450 words.

Time flies to 2050, and I am a middle-aged woman in my thirties. Now China has become the biggest power in the world. With the rapid development of transportation, China has made a magical means of transportation called polyhedron. Now basically every household has it, and it can seat up to five people. Besides, its price is very affordable.

When you want to go out, you can sit in a polyhedron. There is a multi-faceted computer in the polyhedron. You just need to enter the place you want to go on the keyboard and click "confirm on many sides". The polyhedron will become a car and take you where you want to go. If the speed is a little slow, you can speed up. If there is a traffic jam, you can turn the car into a small plane and fly in the sky. If you feel uncomfortable and can't fly, you can turn a small plane into a boat and stay upstream of the water until you reach the place you want to go. Don't worry, the polyhedron is filled with a kind of high technology, and nothing will happen.

Polyhedron uses electricity instead of gasoline. When working, it can automatically generate electricity to replenish electricity, and it can be recharged when the electricity is insufficient. It can be put in a small battery on the engine and charged with a special charger, which can be fully charged in less than an hour. After the battery is fully charged, you can drive100000 km by inserting the polyhedron.

3. The composition of Unit 5 in the second volume of the sixth grade is 450 words.

I was curious about the blue sea, so in 2090, I put on the latest deep-sea exploration suit and entered my dream sea. When entering the sea, the detection suit automatically turns on the diving mode, and it automatically swims in the sea. No fish can find me, because it not only turns on the stealth mode, but also covers my breathing.

I went to the sea with two other friends. In front of us is a transparent glass with various data and functions displayed on the left and right sides. If you want to determine the location of the other two people, you only need language control, and it will automatically locate the equipment nearby 100 km. If you want to chat with a friend, just say a word and it will automatically connect me. I like to play with my friends. I am thirsty and hungry. It can send messages to my friends. Our three sets of detection suits are spliced together, which can provide me with power. I can take out water and food from my backpack in the detection suit.

Swimming to the deep sea, the water pressure is very high, but we are not affected at all under the protection of the detection suit, and continue to swim to the deep sea. ...

When I met an unfamiliar fish, I said "detect this species" and a series of information about it appeared on the screen. Suddenly, the king squid appeared in front of us. We quickly said "escape", and the system drew up a route to increase the speed to the fastest. In the blink of an eye, we came to another water area.

If you continue to dive and encounter dangerous fish, the detection suit will emit its own smell, which is very effective for small and medium-sized fish.

Finally, tired of playing, we pressed the red button and the three of them rushed to the sea. The detection suits they wore also turned into air boats similar to small yachts and rushed to the shore. ...

4. The composition of Unit 5 in the second volume of the sixth grade is 450 words.

Everyone has a different vision for the future, but have you thought about the "future environment"? In the future world, I see fewer and fewer cars emitting exhaust gas in the streets and lanes of the city, and everyone begins to ride environmentally-friendly bicycles. People in the future have realized their mistakes and feel the need to protect the earth's environment. There is only one reason to know the earth.

In the future world, there will not only be lanes and sidewalks on the streets, but also more garbage lanes. The garbage chute is between the driveway and the sidewalk, and it is two natural blues. Mainly used to let the machine trash can go. This trash can will pick up the garbage and recycle it when it sees it.

In the future world, supermarkets, shops and stalls will not be able to buy disposable products. I didn't even see disposable items in the restaurant.

Take the shops and vegetable shops near us as examples. After eating the fruit, the vegetable seller threw the remaining stones on the road, and the garbage truck was placed next to it. The fish seller spilled smelly water on the road. Many people who walk from here cover their noses to speed up their steps and want to get there quickly.

To this end, we should cherish this beautiful day, protect our homeland, and prohibit the destruction of ecological balance, deforestation and indiscriminate killing of wild animals.

We only have one earth! In order to save our lovely earth, let's spend the beautiful earth we live on together. Planting trees and returning farmland to forests are no longer slogans, but the embodiment of our actions. We want the earth to be a green planet, a planet with birds and flowers.

Protect the environment and save the earth, starting from now, starting from me. The earth, our beautiful and lovely home, needs us to love it as much as life.

5. The composition of Unit 5 in the second volume of the sixth grade is 450 words.

"I have a horn on my head and a tail behind me. Nobody knows how many secrets I have. I am a little dragon ... "If only the dinosaurs had come back to life. Suddenly, I heard a deafening sound. I looked at my watch at once and found that it was 2090. I was walking in the street curiously, and passers-by looked at me with strange eyes and said, "It's afternoon, why doesn't she walk the dinosaur?" You didn't come out of a mental hospital, did you? Let's stay away from her. "I rushed to the pet store and found that it was full of cute baby dinosaurs. Then I went to the butcher shop and found that it was full of dinosaur meat.

In order to integrate into this world as soon as possible, I also bought Liang Long Baby, which rubs around me like a sister with bugs. I took it to a clothing store, tied it with a bow and put on a long lace dress. I thought it was as cute as a kitten and gradually sprouted me. We came to the circus to watch the performance. First, we performed a Tyrannosaurus Rex, which showed dagger-like teeth and directly chewed up the car. I saw Lei Long's neck bitten off. The scene of the fight frightened Liang Xiaolong. I immediately held it and comforted it.

Now, I have integrated into this world, but I don't understand. In my heart, Liang Long is very powerful, but people keep it as a pet, eat it and let them kill each other. I really don't understand?