Expository essay 600 words essay on being a human being

Some people should be observed. So as to get to know them, to name their characteristics, specific things, and some generalizations. Try it yourself.

Protecting the environment is everyone's responsibility. Afforestation is a basic national policy of our country, and there are many benefits to greening the motherland. Greening, as the name suggests, is to vigorously carry out afforestation campaigns throughout the country, and use green vegetation to decorate our land.

Forests are man's friends. Forests can not only green the environment, but also prevent wind and sand fixation, prevent soil erosion, absorb carbon dioxide, and reduce environmental pollution. It is known as "nature's beautician", "special doctor", "wood mill", "green state" ......Without forests on Earth, it would be difficult for humans to survive.

Forests are the best places for human recuperation and recreation. There is no annoying noise and noise in the forest, but it is full of infinite harmony and infinite beauty of nature, the leaves are rustling, the mountain springs are rippling, the birds are singing and the flowers are fragrant and the sound of the forest and the sea is a kind of beautiful enjoyment for human beings.

First of all, afforestation can conserve soil and water. To control soil erosion, it is necessary to plant trees. Because trees have root systems as big as their crowns.

These roots stretched out in all directions, like giant hands firmly grasping the soil. The water in the soil that is caught is constantly absorbed and accumulated by the tree roots. According to the data, one acre of forest stores 20 tons more water than the non-forested area.

In this way, the soil and water can be preserved.

Secondly, afforestation can eliminate air pollution and beautify the environment. According to statistics, one acre of forest can absorb 20-60 tons of dust a year; It can absorb 67 kilograms of carbon dioxide and release 49 kilograms of oxygen every day, which is enough for 65 adults to breathe, and one acre of forest can absorb 4 kilograms of toxic gas carbon dioxide per day. One acre of pine and cypress can secrete 2 kilograms of fungicide in a day and night, which can kill the germs of tuberculosis, typhoid, diphtheria, dysentery and other diseases, so as to purify the air and ensure people's physical and mental health.

To provide an ideal place for human beings to study, work, play and live.

Are we Chengjiang beautiful? Certainly beautiful. It has the reputation of "Pearl of the Plateau".

Wouldn't it be more beautiful if the mountains on the Chengjiang River could be covered with forest vegetation? Tourist resorts such as Tengchong in Yunnan, Xishuangbanna and Jiuzhaigou in Sichuan would not have the popularity they have today if they were not for their high forest coverage.

The benefits of afforestation for the benefit of future generations are endless. We must actively devote ourselves to the greening action and water the mountains and rivers of the motherland with sweat.

Apple Expository Text.

The apple is a familiar fruit, it's chubby, and it has a bountiful red color all over its body. Holding it in your hand it will gently cling to your palm, and when you choose it from thousands of apple trees, it is a kind of happiness for it It can bring people a sweet taste, and this is its greatest happiness, apple, which is a fruit that grows in the north. Idioms"Fruitful"That's what it is.

As you walk through an apple grove, the enticing smell of the apple forest will enter your nostrils and even your whole body with a breeze, and the long-lost feeling of comfort will burst out of your long-buried nerves. What could be easier than that? Let me introduce you to Apple!

Flowering apple trees are deciduous trees that can reach a height of up to 15 meters, and are generally 3 to 5 meters tall under cultivated conditions. The trunk is grayish-brown, the old bark has irregular longitudinal lobes or flaky peeling, and the twigs are smooth. The leaf order is single-leafed alternate, elliptical to ovate, with serrated margins.

Inflorescence with white petals, pink when bracting, stamens 20, stigma 5The fruit is a kernel and varies in color and size depending on the variety.

Apples love light and prefer slightly acidic to neutral soils. It is most suitable for sandy soils with deep soils, rich in organic matter, and well-ventilated and drained core soils. There are more than 7,500 known varieties.

Good breeds: "Red Star Series", "Red Fuji", "Jonathan" and so on. In addition to fresh varieties, there are also cooked apples.

Because the fruit acid of apples has the effect of retaining moisture, it is suitable for baking. Apples contain a lot of pectin, a soluble fiber that lowers cholesterol and bad cholesterol. It can also control conditions such as asthma and chronic obstructive pneumonia.

Apples have a special role in enhancing children's memory. Apples not only contain a variety of vitamins, lipids, minerals, sugars and other nutrients necessary for the brain, but also contain fine fiber, which is beneficial for children's growth and development, and zinc, which can enhance children's memory. Zinc is an essential element for the formation of nucleic acids and proteins that are closely related to memory, and zinc deficiency can lead to poor development of the hippocampus at the edge of the cerebral cortex.

Once zinc in food is reduced, a child's memory and learning ability can be severely impaired, and this damage can last into adulthood. In order for a child's memory to be good, children should be asked to eat more apples. I'm a little bee.

We bees live in groups. There are three types of bees in a colony: a queen bee, a handful of drones, and thousands to tens of thousands of worker bees.

I am one of those 10 million worker bees.