We should try our best to love it,
In the face of obscurity and persistence in human nature,
We should try our best to love it,
Fudan should shoulder the responsibility of protecting nature.
Without land, people can't survive; Land cannot be separated from people.
The land is barren and uninhabited; People left the land and starved to death.
This is a proverb about the relationship between man and land; This proverb is about the relationship between land and people.
Soil refers to a loose layer of material on the earth's surface, which is composed of various granular minerals, organic matter, moisture, air and microorganisms, and can grow plants. Soil consists of minerals, animals and plants, organic matter, soil organisms (solid matter), water (liquid matter), air (gas matter), oxidized humus, etc.
Solid substances include soil minerals, organic substances and nutrients obtained by microorganisms through light sterilization. Liquid substances mainly refer to soil moisture. Gas is air existing in soil pores. These three substances in the soil constitute a contradictory unity. They are interrelated and mutually restricted, which provide necessary living conditions for crops and are the material basis of soil fertility.
Synchronism is one of the main rock-forming minerals, commonly called low temperature synchronism (α-synchronism), and it is the most widely distributed mineral in synchronism. The generalized response time also includes high temperature response time (β-response time) and coesite.
The main component is silicon dioxide, which is colorless and transparent, often containing a small amount of impurities, and becomes translucent or opaque crystals with a hard texture.
Yingshi is a kind of mineral resource with very stable physical and chemical properties, and its crystal belongs to the three-crystal oxide mineral.
Timely block, also known as silica, is mainly the raw material for producing quartz sand, as well as the raw material for timely refractory and ferrosilicon firing.
It is a mineral composed of silicon dioxide, and its chemical formula is SiO2. Pure time is colorless and transparent, because it contains trace pigment ions or finely dispersed inclusions, or colored centers, which reduces transparency, so it has various colors. It has glass luster, and the fracture surface is oily luster. Hardness 7, no cleavage, conchoidal fracture. The specific gravity is 2.65. Piezoelectric.
Colorless and transparent seasonality is called "Krystallos" by the Greeks, which means "Bai Bing". They are sure that it is solid and durable ice in time. Ancient people in China believed that cold crystals in their mouths could quench their thirst. Quartz sand is an important industrial mineral raw material, which is widely used in glass, casting, ceramics and refractories, metallurgy, construction, chemical industry, plastics, rubber, abrasives and other industries.