In four expository compositions, we should use the method of explanation and tell what method of explanation is used.

"The little white rabbit, white, ears. I love carrots and vegetables, so cute when I jump! " Every time I read this nursery rhyme, I think of that cute little rabbit-Xiaobai.

Its hair is as soft as a mass of white satin, thin and dense, and it looks like wearing a snow-white fur coat, which is very beautiful! The chubby tail is hidden in the fluff, and it is not easy to find it if you don't look carefully. Its head is very small, and its two long ears stick to its head like two big fans. As long as there is any movement, those ears will keep swinging back and forth. Its eyes are particularly beautiful, as big as small glass balls, like rubies embedded in white jade; It also has a lovely three-petal mouth. There are two front teeth in the mouth; There are several thin beards on both sides of the mouth.

Its front legs are short, its rear legs are long and powerful, it often bends, it jumps when walking, and it squats motionless on the ground, like marshmallows and snowballs. I made a home for the little white rabbit, put it in, and it jumped left and right, as if it were sweeter than honey. White rabbit likes cabbage and radish best. Whenever I throw grass at it, it always dances with joy, greedily eats, and even makes a "tut tut tut" cry, as if to say to me, "Thank you, this tender grass smells good!" After eating the grass, it lay down happily and closed its eyes peacefully.

"The little white rabbit, white, with one ear up. I love carrots and vegetables, so cute when I jump! " I like Little White, because it brings infinite happiness to my life!

For example, reference information

Apple is a kind of fruit that everyone is familiar with. It is chubby and covered with red harvest. Apple is a kind of fruit that grows in the north. The idiom "fruitful" refers to it.

The height of flowering deciduous trees of apple trees can reach 15 meters, and it is generally 3-5 meters high under cultivation conditions. The trunk is grayish brown, the old bark is irregular and the branchlets are smooth. The leaf sequence is simple and alternate, oval to ovoid, and the leaf margin is serrated. Due to the different climate, the flowering period of apples varies greatly. Generally in April-May, there are 3-7 flowers in each bud, and the central flower blooms first. Corymb with white petals, pink buds, 20 stamens and 5 styles. Apple trees begin to bear fruit 2~3 years after planting, and the fruit is kernel, and its color and size vary with varieties.

Apples like light, slightly acidic to neutral soil. There are more than 7,500 known apple varieties. Improved varieties: "Red Star Series", "Red Fuji" and "Jonathan". In addition to fresh varieties, there are apples for cooking. Because the fruit acid of apple has the function of retaining water, it is suitable for baking

Apples contain a lot of pectin, which can reduce cholesterol and bad cholesterol, and can also control diseases such as asthma. Apples are rich in nutrition. It contains vitamins A, C, E, protein, fat, citric acid, phosphorus, calcium, zinc, sodium and other trace elements, and has many functions, such as nourishing brain, enriching blood, sleeping peacefully, moistening lung and pleasing heart. "

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The earth is a beautiful planet where human beings live. She is the mother of mankind, giving us food, clothes and everything we need. However, we are destroying her other children-plants, lower animals, so that the ecology is destroyed and finally human beings can't survive. We can only say goodbye to her and live on another planet.

In 30 16, mankind successfully copied the earth's umbrella, the ozone layer, and placed it around all the solid planets in the solar system to resist the harm from the sun. Send air to every planet. Synthetic network

In 30 17, the "time compression channel" was born in the sweat of many scientists, with the purpose of connecting every planet with ozone layer so that human beings can have many "earths". But each planet is too far apart, ranging from thousands of light years to billions of light years. When they arrived at their destination, they almost stayed in the grave for a long time. what can I do? Don't worry, since it is a time compression channel, it can naturally compress time, so it only takes a few hours, not billions of light years. Synthetic network

There are air, channels and water. The earth lacks fresh water resources, but there is plenty of seawater. Scientists invented the water purifier. It is a channel. When the water flows to other planets, it is filtered by the water purification chip on the channel for countless times, turning seawater into fresh water.

It is not enough to have these projects, but also to adapt humans and animals to the environment. In view of this, scientists moved some plants with strong vitality on the earth to other planets, making their scenery and environment similar to that of the earth. Then install an "acid rain filter" around the planet where the acid rain will come, and filter the acid rain into ordinary rain, so as not to harm the creatures on it.

Then, there is the house. If construction workers are allowed to build it, the speed will be too slow, and the earth and human beings can't wait. At this time, a machine played an important role, "stereo camera". Stereo cameras can turn things into three dimensions. Adjust the camera to the required size, and then put some material in it. When it began to run, the material was folded into a model. When the model was "released", the "magnifying glass" was opened and the house appeared in front of people.

People moved in in batches. But you can't use the transportation on the earth! According to the different characteristics of each planet, scientists set up a "jet car" on Mars. Most spray trucks are made of sealed super plastic. For the sake of beauty, you can draw your favorite patterns on it with authoritarian pigments.

On Mercury, the daytime temperature is too high, and the temperature difference between day and night is too large. Scientists developed the "Mercury Bicycle" on the basis of bicycles. Mercury bicycle tires are made of "heat-resistant rubber", which absorbs a little heat when the temperature is high during the day and isolates the rest. When the temperature is low at night, heat is released again. In this way, the "insulation board" is connected to the pedal and the front of the bicycle to make the temperature suitable.

On Saturn, because Saturn is more attractive than the earth. Scientists have created "suspended shoes" again. This kind of shoes inhale waste gas, and the "air purification chip" inside purifies it into air for human and animals to use, and then sprays it downwards, so that the impact of the gas rebounds and the shoes float upwards. This shoe is equipped with a display screen, which can be used to adjust the direction, destination, speed and ground distance.

When the space migration base is built, mankind can rest assured, but we can't destroy the environment, kill animals and cut down trees at will, or destroy our own homes.

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Is it okay?