Spring has finally come. Before the northern people feel the red flowers and the green willows and the song of the dancing warblers, they can't avoid the "baptism" of the dust several times. Do you know how to determine the sandstorm weather? When you stand outside in the turbid air and can't see the place one kilometer away from you, this is the sandstorm weather. As soon as the sandstorm came to block out the sun, the outdoor people were suffering. Violent sandstorms block traffic, destroy communication lines and even buildings, and damage human lives. What we usually call sandstorm is actually the general term of sandstorm and dust storm. Generally speaking, sandstorm is to raise sand on the spot (blowing sand). The distance of carrying sand material is not far, but the dust storm (floating dust) can move thousands of kilometers or even farther in the air. Last summer, Francis, a geologist at the University of Bordeaux in France, and his colleagues found these "unexpected visitors" from China in the snow of the European Alps. In recent years, the media has paid a lot of attention to sandstorm, which reflects the anxiety of all walks of life and the importance of governance. In order to find the right way of governance, we must first make clear its formation mechanism. So are sandstorms caused by several simple causes or by multiple systems? Is the source of sand formed and occurred in a short time, or in a long time, or even a geological change process? Is sandstorm a natural or man-made result? This paper tries to discuss these problems.
【天造还是人为?】相关文章:
★ 高二英语作文精彩范文1000字:Never Be Lost in Your Dream
★ 高二英语作文:English — A Bridge to The World
★ 高一英语作文:Should Celebrity Have Privacy?
★ 高一英语作文:How to be a friend of yourself_