The world’s first hydrogen-powered city train indigenously developed by China rolled off the production line in Chengdu of Sichuan Province on Wednesday. The zero-carbon train, with a maximum speed of 160 km/h, can run 600 km on one fueling.
The type of map shown below, or the method of showing the earth as a whole, is called Cylindrical projection. This is the map we usually see. Here, the surface of the earth is wrapped around an imaginary cylinder and...
This is a condition that occurs to at least some people when they reach a high peak area like Mt.Everest. It is known that as the altitude increases, the oxygen decreases… As a result, the brain does not get enough...
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