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How to write the exercises of China Garden III in the second volume of Grade Four (People's Education Edition)?
Nature is our human teacher. Ants teach us unity, eagles teach us strength, and lions teach us courage. I watched a movie today, and the animals in it made me learn wit again.

Rattlesnakes like to eat lizards, but they know that lizards are not easy to catch, so they come up with their own countermeasures. I saw the rattlesnake wagging its tail and sticking its head into the soil, revealing only a small tail, which looked like a lonely grass standing there from a distance. At this moment, an ant looked around as if looking for something. Suddenly, his eyes lit up and he walked to the "grass". Seeing the delicious food in hand, the lizard quickly climbed over. When the lizard opens its mouth to eat, it feels lighter and floats. Instead of eating delicious food, the lizard lost its life first. I never thought that smart lizards would be defeated by rattlesnakes. The invention of mankind-inspired by animals-ships and submarines came from people's imitation of fish and dolphins. Scientists have made the first batch of gas masks in the world according to the unique drug detection ability of wild boar nose. The rocket takes off by using the recoil principle of jellyfish and squid. Researchers have developed many military camouflage equipment for the army by studying the chameleon's color-changing ability. Scientists studied frog eyes and invented electronic frog eyes. The US Air Force has developed a miniature thermal sensor through the "hot eye" function of poisonous snakes. Humans also used the principle of leapfrog to design a toad ram (hang). Humans imitate the highly sensitive sense of smell of police dogs and create "electronic police dogs" for investigation.

Bionic and high-tech modern radar, a radio positioning and ranging device: scientists found that bat monsters rely not on eyes, but on an echo positioning system consisting of mouth, throat and ears. Because bat magic emits ultrasonic waves when flying, it can also detect the ultrasonic waves reflected by obstacles. Based on this, scientists have designed a modern radar-a radio positioning and ranging device ... Scientists have invented an artificial dolphin skin that can improve the speed of torpedoes by studying the tiny swimming resistance of dolphins; And a wheeled vehicle (jumping machine) that imitates kangaroo's movement in the desert.

Inspired by King Penguin, scientists from the Institute of Zoology of the former Soviet Academy of Sciences designed a new type of car-"King Penguin" brand polar off-road vehicle. The wide bottom of this car is directly attached to the snow surface and supported by a wheel spoon, and the driving speed can reach 50 km/h.

Scientists make space robots by imitating insects.

A research team of Australian National University has developed a small navigation and flight control device by studying several insects. This device can be used to equip small aircraft for Mars exploration.

Inspired by bionics, British scientists are developing a new submarine, which can swim in an S shape by swinging its tail fin. The main innovation is the use of a device called "trunk actuator". "Elephant trunk" consists of a group of thin and soft hoses, which imitate muscle activity and promote fin movement. This new submarine can be used as an underwater mine-clearing submarine to deal with mines that will detonate under the slightest noise or interference.

Animals show unique wisdom for their own survival, and they are equally witty when they take care of their children as mothers.

After the mother duck hatched her ducklings, she was very worried, fearing that her baby would get lost, and kept watch over her baby every day. One day, a hyena wanted to eat a duckling, so she walked slowly behind a meadow. Unexpectedly, its movements were heard by the mother duck. Mother duck told her baby to leave quietly and go to the safe river. It began to perform by itself. It first pretended to be dead and rolled on the ground. The hyena thought it was hopeless and concentrated on it. When the hyena approached, the mother duck flapped her wings slowly and walked forward slowly, like a failed soldier running for her life. In this way, the hyena ran out of time in the performance, and the duckling has reached the safety zone. At this time, Mother Duck immediately jumped into the river, and the hyena woke up and was beaten once. But it's too late to regret.

Every animal in nature is our teacher!

The revelation of nature

Nature is our human teacher. Ants teach us unity, eagles teach us strength, and lions teach us courage. I saw a movie today.

A long time ago, there were no umbrellas in the world. At that time, it was inconvenient for people to go out in summer. The sun burned my skin. I get wet when it rains. Lu Ban is eager to help people solve this difficulty. He thought, if only he could make something that can shelter from the wind and rain.

Lu Ban used a lot of brains. Later, he and several carpenters built a pavilion by the roadside. The top of the pavilion is very sharp, supported by several pillars around it. Then, they built a pavilion every other road and built many pavilions. In this way, it is much more convenient for people to walk. When it rains, hide; The sun is uncomfortable. Take a rest and catch your breath.

Lu Ban did a good thing for everyone, and everyone was very grateful to him. But Luban himself was not satisfied. He thought, what should we do if it doesn't stop raining? People can't always stay in the pavilion.

We must find another way! Lu Ban thought: If only we could make the pavilion smaller and let everyone take it with us! But how can we make the pavilion light and smart? For this matter, he can't eat well and sleep well.

Luban thought for many days, but he still didn't come up with it. One day, it was extremely hot, and he was sweating while working. Suddenly I saw many children playing by the lotus pond. After a while, a child picked a lotus leaf and put it on his head.

Lu Ban thought it was fun and asked them, "What are you doing with a lotus leaf on your head?" The child said noisily, "Master Lu, look, the sun is like a big fire wheel. We are not afraid of the sun with lotus leaves on our heads. "

Lu Ban grabbed a lotus leaf and looked at it again and again. Lotus leaf is round, with veins on one side and a cover on the head, which is light and cool.

Lu Ban's heart lit up. He hurried home, found a bamboo, chopped it into many thin strips, and made a shelf according to the lotus leaf; I found another sheepskin, cut it into a circle and put it on a bamboo shelf. "All right, all right!" He cried happily, "This thing can shelter from the wind and rain and shade the sun, and it is also very smart."

Lu Ban's wife heard him shout and ran out of the house and asked him, "What happened?"

Lu Ban handed the newly made thing to his wife and said, "Try this thing. Everyone takes it with them when they go out. They are not afraid of rain or sun."

Luban's wife looked at it, thought about it, and said, "It's not bad, but the rain stopped and the sun went down, so it's not convenient to walk with such things." If only it could be put away. "

"Yes, yes!" Lu Ban was very happy to hear this, so he started with his wife, changed this thing into a movable one, spread it out when it was used, and put it away when it was not used. What is this thing? This is our umbrella today.