Look at the plane and write an explanatory composition.

1. Some good ways to make airplanes are also eager to try: Where are we? The outside of our plane is all white, because I can finally fly. As a matter of fact, we have already arrived over Guangzhou, and the plane has once again gone deep into Bailin. Suddenly, our flight finally arrived. You see, after a while, I thought about it and wanted to be the first in this flight. I didn't know that the plane flew over the clouds and turned the weather into cloudy and appeared on the clouds. I didn't know it then. I looked around and it was dark again. I only heard someone shout, some like Yuelongmen and a carp. First, the plane flew a few hundred meters above the ground and blew over Guangzhou. A sun appeared in the sky. I think it's not cloudy today. Do you jump high? How can there be a sun? Beautiful Guangzhou appeared in front of my eyes. Blink of an eye, ribbon as bright as glass. The fifth grade wrote 65438+1on the morning of October 20th, I think, I have been complaining about the airflow ahead, and this plane has flown into the clouds that seem to be a forest. I came to the airport with a happy mood. The farther and shallower it is, the Pearl River is embedded in the middle. It seems to turn white and meet white clouds: did this hour pass in this fog? I sat anxiously in the waiting room. We took flight CZ8339 to Guangzhou, and a gust of wind blew. Has our plane finally taken off? In the blue sky, I looked down from the window and waited for the plane to arrive. I looked up, but was blown away by the airflow. Finally, just like a beautiful landscape painting, I haven't reflected the different air pressures in the sky. 10: 30, rows of tall buildings appeared. I can't wait to stand at the ticket gate of the plane. The plane in front of me rushed out of the clouds and wrote a composition on the plane. At this time, the plane put away the landing gear. That cloud. Pupils write 550 words by plane (/.

2. Introduce the composition of the aircraft and the remote control aircraft.

I think the remote-controlled helicopter is a toy that everyone likes. Actually, I like it very much. Let me introduce it to you.

The remote-controlled helicopter is a small model similar to a helicopter. It looks like a pentagon, with four circular fan blades on the top of the head and two small fan blades behind the tail, like two small leaves. Its "body" has two exposed gears, and there are two obvious "cage power devices" on it. Its "eyes" are the "low-power flashlights" in front, and these "eyes" are also the signal lights for aircraft flying at night. Of course, its "mouth" will also glow. Viewed from the side, its fuselage looks like a smiling face. It has a long "tail" trailing behind, just like the tail of an animal.

Its body is grass green, like a small lawn. I also like green very much, because green is the color of nature.

Its main materials are plastic and iron. The reason why its shell is plastic is to reduce the weight of the plane itself, but the real plane is made of iron to prevent the strong resistance of the wind from destroying it. )

The shape of the remote control is upside down like a kitten's head. It is mainly made of plastic. The left and right sides control the height and direction respectively. The middle button is used to open and close. There is an antenna in the middle.

This plane can also be its own little helper. For example, its blade can be used to peel apples when it rotates rapidly; You can use it to "transport" things, write a small note, tie it to the plane and let the plane deliver it to you. (Short distance only) You can also hold an airplane competition to see which plane can fly faster and better.

Remote-controlled helicopters can be their own little assistants and even do some housework. In my eyes, it is a useful and interesting "friend".

3. A good way to make an airplane. Some of them are eager to try: where are we? The outside of our plane is all white, because I can finally fly. In fact, we have already arrived over Guangzhou, and the plane has once again gone deep into Bailin. Suddenly, our flight finally arrived. Look, after a while, the first person who wants to board this plane is thinking about it. It also made the weather cloudy and appeared above the clouds. I didn't know it then. Looking around, it's getting dark again. I only heard someone shouting, some like Yuelongmen and a carp. First, the plane flew to a height of several hundred meters above the ground and blew over Guangzhou. A sun appeared in the sky. I think it's not cloudy today. Do you jump high? How can there be a sun? Beautiful Guangzhou appeared in front of my eyes. Blink of an eye, ribbon as bright as glass. The fifth grade wrote 65438+1on the morning of October 20th, I think, I have been complaining about the airflow ahead, and this plane has flown into the clouds that seem to be a forest. I came to the airport with a happy mood. The farther and shallower it is, the Pearl River is embedded in the middle. It seems to turn white and meet white clouds: did this hour pass in this fog? I sat anxiously in the waiting room. We took flight CZ8339 to Guangzhou, and a gust of wind blew. Has our plane finally taken off? In the blue sky, I looked down from the window and waited for the plane to arrive. I looked up, but was blown away by the airflow. Finally, just like a beautiful landscape painting, I haven't reflected the different air pressures in the sky. 10: 30, rows of tall buildings appeared. I can't wait to stand at the ticket gate of the plane. The plane in front of me rushed out of the clouds and wrote a composition on the plane. At this time, the plane put away the landing gear. That cloud. Pupils write 550 words by plane (/.

4. Write a short article about airplanes. On Friday, the teacher assigned an assignment.

Let's make a small production on Sunday. While I was racking my brains, I saw a small plane outside the window. Isn't that okay? On the weekend, I started making.

I first found a one-foot-long square stick as the fuselage, fixed a truncated stick at its quarter end, perpendicular to the fuselage, and then wrapped it in colored paper. Then take a plastic cotton block, cut off two wings and stick them on a stick perpendicular to the fuselage.

Sticking stickers on the wing for decoration will make the wing look much better. The next step is to make the tail.

In the same way as before, I fixed a small stick with a shorter length at the other end of the stick, wrapped it in colored paper, pasted a glider cut with plastic cotton, and then pasted a sticker, and the tail was finished. The key part of the plane is the propeller.

I cut the thick plastic skin into a leaf shape, fixed it on a wooden stick, and then installed it on the head of the small plane to let it rotate freely. How to make it fly smoothly? I tried many methods, but none of them succeeded. Finally, it was completed under the guidance of my father.

Small aircraft production constitutes 5 small aircraft production constitutes 5. He helped me put a small hook made of iron wire on the top of the propeller shaft, fixed the same small hook on the tail, and wrapped several strands of leather around the two small hooks.

When I appreciate my work, I will fail at work. Do not give up. As long as you persist, you will succeed.

I think the remote-controlled helicopter is a toy that everyone likes. Actually, I like it very much. Let me introduce it to you.

The remote-controlled helicopter is a small model similar to a helicopter. It looks like a pentagon. There are four circular fan leaves on the top of the head and two small fan leaves behind the tail, like two small leaves.

Its "body" has two exposed gears, and there are two obvious "cage power devices" on it. Its "eyes" are the "low-power flashlights" in front, and these "eyes" are also the signal lights for aircraft flying at night. Of course, its "mouth" will also glow. Viewed from the side, its fuselage looks like a smiling face.

It has a long "tail" trailing behind, just like the tail of an animal. Its body is grass green, like a small lawn.

I also like green very much, because green is the color of nature. Its main materials are plastic and iron.

The reason why its shell is plastic is to reduce the weight of the plane itself, but the real plane is made of iron to prevent the strong resistance of the wind from destroying it. The shape of the remote control is upside down like a kitten's head.

It is mainly made of plastic. The left and right sides control the height and direction respectively.

The middle button is used to open and close. There is an antenna in the middle.

This plane can also be its own little helper. For example, its blade can be used to peel apples when it rotates rapidly; You can use it to "transport" things, write a small note, tie it to the plane and let the plane deliver it to you. (Short distance only) You can also hold an airplane competition to see which plane can fly faster and better.

Remote-controlled helicopters can be their own little assistants and even do some housework. In my eyes, it is a useful and interesting "friend".

6. The method of origami plane (composition) The paper plane should fly far and fast, and there are several points to pay attention to:

1) try to fold symmetrically on both sides. If it is asymmetrical, the plane will turn easily and fly not far.

2) The ratio of wing to fuselage should be appropriate. The little wings of the fuselage is large, and the lift of the aircraft is enough, but the center of gravity is lifted, and the thrown aircraft is easy to float; The fuselage has big wings and small wings, and the center of gravity has moved down too much. The plane is like a dart, full of inertia, but it has lost its gliding journey, as if it were a paper ball thrown out. The correct and reasonable proportion of wing and fuselage depends on the shape of paper plane and the texture of paper, and the best proportion can be found after many attempts.

3) Pay attention to the balance before and after. The nose is too heavy, and the plane is easy to stick to the ground; The nose is too light, which is easy to cause the nose to tilt up and lead to stall. The balance of the paper plane can be adjusted by adjusting the shape of the paper plane, or by properly loading paper strips or tapes (if allowed);

4) Finally, the throwing of paper planes is also very particular: don't fly sideways, otherwise it will be easily scratched; There is not enough motivation to throw with the wind; It's best to throw against the not too strong headwind, and the angle is slightly larger than the horizontal angle, about 15 degrees. The plane should be sent forward smoothly, and it will be released at the last moment, so that it can fly farthest.

7. The self-described composition of the 50th "I" of the airplane is the space shuttle. Want to know who I am? Let me introduce you.

I have triangular wings, a pointed head and a square tail. I fly very high. "I" can fly100,000 meters, and ordinary planes can only fly 20,000 meters. From the coast of the East China Sea to the Pamirs, it only takes me seven minutes, but it takes four hours by plane! Another feature of "I" is vertical takeoff and horizontal landing. When "I" rises, I always hold my head high and take off vertically with a deafening roar. When I returned to the ground, it sounded as quiet as a glider landing. Why? When taking off, I hung an external fuel tank and two booster rockets bigger than myself. Of course, I didn't take off horizontally like a plane, and I suffered much more air resistance than a big plane. Also, the rocket engine can only work for a short time, and vertical takeoff can rush out of the dense bottom atmosphere in the shortest time. When I get home, I can land horizontally like a glider without taking those things with me.

Do you know me now? It's getting late, you see, scientists are going to send me into space again, and we are doomed to meet again!

8. Describe the aircraft wake by analogy. Have you ever seen an air show? If you have seen it, you will remember that Yin Yan, flying and fighting in the sky, is dancing white ribbons in the blue sky. As the silver eagle rolled up and down, the white ribbons slowly unfolded in the sky of Wan Li, which was really fascinating. What a charming scenery! Is this really white silk hanging on the plane? No, it's not a ribbon, it's a wake left by a high-speed jet.

What people usually call aircraft smoke is actually not aircraft smoke, but a special cloud formed by the condensation of water vapor at the tail of the aircraft. Meteorology calls it aircraft wake. How is it formed?

Aircraft wake can be divided into exhaust wake, convection wake and aerodynamic wake. Exhaust wake can be divided into exhaust condensation wake and exhaust evaporation wake, and the common aircraft wake is exhaust condensation wake. After the plane passed by, the engine spewed out high-temperature gas containing a lot of water vapor. If the ambient temperature is very low (below -40℃), these high-temperature and high-humidity gases quickly mix with the ambient air, the temperature drops rapidly, and the humidity increases sharply, thus condensing to produce aircraft wake, which is completely different from the effect of adding smoke screens in flight shows.

The formation of aircraft wake is not only related to the temperature of the surrounding atmosphere, but also depends on the temperature of flight altitude. Experience shows that when the temperature is between -40℃ and -60℃, the humidity is above 40%, or the humidity near the tropopause is above 60%, the aircraft wake may appear. The exhaust wake mostly occurs at the height of 1 1~ 13 km above the ground.

9. Write a composition about something you are familiar with in some explanatory ways. Have you ever seen a mountain? This mountain is very big.

Have you ever seen the sea? The sea is vast. I have always believed that people can understand a lot in nature.

Nature contains many philosophies of life. Just like the moon, the full moon and the lack of the moon represent the reunion and separation of relatives and friends.

Ants and aphids show cooperation and mutual assistance in order to survive. Have you ever seen a bee living alone? They pay attention to the spirit of unity and division of labor.

Nature has also brought me years in a hurry, so I must cherish the enlightenment of time. Look at the sunrise and sunset, as if the sun has just risen, but the stars and the moon are sparse in the blink of an eye.

Cordate telosma quietly blooms and fades. If the fallen flowers and leaves once represented the end of a gorgeous life, it would be too short.

The glory when the bud was born suddenly turned into lifeless dryness! Butterflies will also die in the cold fragrance of flowers in Xia Hou during the busy season. Life is short, but if we can make it shine, it can be called eternity, can't it! Japanese scientists were inspired by ants foraging. They developed a large-scale integrated circuit, simulating foraging ant Qi Xin to carry food together, and continuously transmitting information from the nearest "food source" to the "ant nest". According to this new information processing method, it is possible for people to develop a computer with a new computing mode. There are also many inspirations from nature. For example, we built an arch bridge to imitate the characteristics of eggs. Inspired by the flight of birds, people invented airplanes. Cut off your fingers from the thatch and invented the saw ... There are many animals and plants in nature with their own unique lifestyles, suggesting the mysteries of nature. There are many revelations in nature, among which there is a snake called rattlesnake, which has an infrared eye. Through this snake eye, mankind has developed a missile with the same eyes as a rattlesnake. Its name is rattlesnake missile, because humans imitate the eyes of rattlesnakes. Therefore, it was named the Diamondback Missile. The rattlesnake missile, like the rattlesnake, can accurately track the enemy with a "golden eye" until it is destroyed. Because the rattlesnake's "hot eyes" judge the enemy's position according to the enemy's temperature, the rattlesnake missile can accurately hit things like airplanes, warships and tanks. Mobile low-altitude short-range all-weather ground-to-air missiles developed by France are mainly used to deal with low-altitude and ultra-low-altitude fighters and ground-to-air missiles. In order to defend airports and ports, it can also be used against cruise missiles. The missile is 2.94 meters long, with a diameter of 0. 156 meters, a weight of 84.5 kilograms and a launcher length of 3.02 meters. The warhead is fragment-focused, with a total weight of 13.9 kg and a killing radius of 6-8 meters. The power plant is a single-stage solid rocket engine, and the guidance mode is full-range radio command guidance. The operational altitude is 50 ~ 3000m. The missile has semi-off-road maneuverability. Colorful butterflies, such as Papilio and Monarch butterflies with brown veins, especially Papilio fluorescens, have golden wings, green wings and purple wings in the sun. Scientists have brought great benefits to military defense by studying the color of butterflies. During World War II, the Germans surrounded Leningrad. Trying to destroy its military targets and other defense facilities with bombers. According to the lack of understanding of camouflage at that time, Vanovic, an entomologist in the Soviet Union, put forward the principle that the color of butterflies is not easy to be found in flowers, and covered military facilities with butterfly-shaped camouflage. Therefore, despite the efforts of the Germans, the military base in Leningrad remained safe and sound, laying a solid foundation for winning the final victory. According to the same principle, people later produced camouflage uniforms, which greatly reduced the casualties in the battle. The beehive is composed of hexagonal small beehives arranged neatly, and the bottom of each small beehive is composed of three identical diamonds. These structures are exactly the same as those accurately calculated by modern mathematicians-rhombic obtuse angle 109.28' and acute angle 70.32', which are large-capacity and extremely strong structures with the least material consumption. Many experts are amazed. People imitate its structure and make honeycomb sandwich structural plates with various materials. This structural plate has high strength, light weight and is not easy to conduct sound and heat. It is an ideal material for manufacturing space shuttles, spaceships and satellites. Polarizers sensitive to the direction of polarized light are arranged near each eye of the compound eye of bees, which can be accurately positioned by the sun. Based on this principle, scientists have successfully developed a polarized light navigator. It has long been widely used in navigation. Dragonflies can generate local unstable airflow different from the surrounding atmosphere through the vibration of their wings, while Wells uses the vortex generated by the airflow to make himself rise. Dragonflies can soar under a small thrust, not only flying forward, but also flying backward and left and right, and the forward flight speed can reach 72 km/h. In addition, the flying behavior of dragonflies is simple. Only two pairs of wings kept flapping. Scientists have successfully developed a helicopter based on this structural foundation. When an airplane flies at high speed, it often causes violent vibration, and sometimes even breaks the wing, resulting in the plane crashing. Dragonflies are safe when flying at high speed, so people follow the example of dragonflies and add counterweights to the wings of aircraft to solve the thorny problem of vibration caused by high-speed flight. Fleas have a high jumping ability. Aviation experts have done a lot of research on this. Inspired by its vertical take-off, a British aircraft manufacturing company successfully manufactured a Harrier aircraft that can take off and land almost vertically. According to the structural characteristics of insect's single compound eye, modern TV technology has created a large-screen color TV, and can also combine small color TV screens into a large picture, which can frame some specific small pictures at any position on the same screen, not only playing the same picture. It can also play different pictures. According to the structural characteristics of insect compound eyes, scientists have successfully developed a multi-aperture optical system device, which is easier to find targets and has been applied in some important weapon systems abroad. According to the mutual inhibition principle of some aquatic insects's compound eyes and monocular eyes, an electronic model of lateral inhibition was made, which was used in various photographic systems. The photos taken can enhance the edge contrast of the image and highlight the outline, and can also be used to improve the display sensitivity of the radar. It can also be used for preprocessing of text and image recognition systems. Based on the processing information of insect compound eye and the principle of directional navigation, the United States developed an engineering model of terminal guidance seeker imitating insect compound eye search. It is developed by using the morphology and characteristics of insects in Japan.

10. How to write the composition of the first flight? I've been on trains, subways and boats ... but I've never been on an airplane. Listen to mom, we are going to play by plane, and it's a threesome! Hearing the exciting news, I was so happy that I almost didn't fall asleep the night before. Looking at the dark sky, I can't wait for dawn in a blink of an eye, so I fly quickly.

The next day, my mother and I came to Shenyang Taoxian Airport. After passing the security check, I finally got on the plane of China Northern Airlines. Come to the engine room, a total of 35 rows, each row of 5 seats, each seat has air conditioning and light button. The stewardess introduced how to fasten your seat belt and how to wear a life jacket. At this time, the radio said, "The plane is about to take off. Please turn off the electronic equipment, fasten your seat belt, open the sun visor and put away the small table board. "

The plane took off, only to see it slide on the slide first. Five minutes later, the front wheel smaller than the wheel rose into the sky. Suddenly, I heard a whoosh in the sky. I looked down at the ground, tall buildings and mountains. This time is too small, just like sand table, frame structure.

Once again, the plane went straight into the sky, and the clouds were as white as steam in the sauna room. Ah! I'm surprised at everything in the air. The clouds in the sky are ever-changing, some like fairies, some like jade carvings, some like mushroom clouds formed when the atomic bomb exploded, some like ice sculptures, and some like rolling snow peaks ... The plane runs smoothly in the air and crawls like snails, not as fast as the plane I usually watch on the ground.

I unfastened my seat belt and began to fiddle with the left and right switches above the seat, and understood how to turn on the air conditioner and turn on the light. Not only interested me, but I also hurried to the toilet. It turns out that the toilet on the plane is so exquisite that it can only hold one person. The stewardess started handing out drinks, and I drank them all. Anyway, I turned the plane upside down and checked it again. After flying for more than an hour, the plane began to land slowly, and we encountered strong airflow. At that time, I felt that my insides were turning over the river. When landing, the plane "squeaked", the front wheel landed first, and it kept sliding on the slide … completely landed. "How cool!" The original flight is so * * *.

This flight left a deep impression on me. I took a picture before flying!