Qin ling 600字高中英语作文
Stretch across China Eastern qinling, white stone mountain west near tam county, gansu province, east longitude tianshui maijishan, through shaanxi, henan, about 1600 km, the north and the south tens of kilometers to a wupan km wide, majestic.
the towering qinling has created the guanzhong males. "Four solid plug thought" the guanzhong basin (shi-ji Liu Jingshu Sun Tong upright). The guanzhong "four," the east, south, west three plug into by the qinling mountains, the east huashan, Wang Shunshan, mount li, east real food, mountains, stand in the Yellow River and waterinfo between; The south taibai mountain, mount zhongnan, etc，cut off in western guanzhong. Another plus YaoShan, Huang Longshan vistas of mountains in the north and together make up the guanzhong and surrounded the terrain. Around mountains between rolling, mountainous, with many in north-west narrow. For its all around has: east to tongguan or letter of valley, south is close, west to scatter, north to Xiao Guan. Tongguan is east into the guanzhong's natural defenses, the south qinling, have nutrient-laden los of the Yellow River and to the north, built in the south qinling shuhe ShangShan GuJian, deep cliff, so-called "fortress integrating ecology"; Scatter off the west the conjugate traffic arteries in guanzhong plain, south in accordance with the qinling mountains, is the throat of shu qin exchanges and the mohican. The other northern Xiao Guan r LiuPanShan foothill, KongE camels the arteries to the guanzhong. Because of qinling, the guanzhong into can attack and retreat and defend, formed "within the system of imperial" good momentum. Occupy the guanzhong, means that the mastery of the world "essentials", throttled kyushu "throat".
dizzy
The sky is blue and the spread over a layer of the cloud like silk screen, in a short time, show a color halo around the sun. It is like a rainbow, but no rainbow bright; Rainbow colour arrangement is in red, uv and halo contrary, is purple red. This is called the "halo", commonly known as "solar or lunar halo".
Our ancestors have long for "halo" was observed and recorded. Now "halo" guizhang away. In the western zhou dynasty was "halo" official as the weather is recorded, until 1630, while the europeans are detailed records about the "halo", later than our country for over one thousand years.Although people have long noticed the beautiful phenomenon, but scientific explanation for the cause of it, is nearly one thousand two hundred years. In 1666, Newton made a very simple but had a great influence on the later development science experiment. He made a beam of sunlight through the prism, the results appear red, orange, yellow, green, green, blue, violet seven color bar. The human realized for the first time, the sun is made up of seven different colors of light, when they move through the prism, due to difference of wavelength, the Angle of refraction that shows their true colors. This discovery, laid the foundation for "halo" of scientific explanation.
Sounding data show that the white clouds, such as silk, is made up of six cylinder shape of small ice crystals. The six-party cylinder of ice crystals like a prism, article can split the sunlight into seven colours. When there is no ice crystals with hundreds of millions of little sign by sunlight, the light is refracted by certain Angle, formed colorful halo ring.
