With the beginning of school season coming, there are rare scenes on the high-speed railway. Both middle school students and primary school students are writing their homework with great effort, and the compartment has become a “big classroom”. The question is, why do these students like to do their homework on the high-speed rail? China’s railway authorities have revealed the secrets. One is that the unfinished homework will be returned sooner or later after the holiday; the second is that the high-speed railway is too stable to do homework. < / P > < p > on the one hand, the acceleration of high-speed railway is strictly controlled to ensure the stability of longitudinal movement; on the other hand, the smoothness of track is strictly controlled by ballastless track. The line is as straight as possible, with few bends and large radius of curve, so as to ensure that the train can not have large horizontal and vertical vibration. < / P > < p > therefore, under normal circumstances, passengers can walk freely on the running train, drawing straight lines with strokes on their seats and drawing drawings with computers are similar to those on the flat ground. At the same time, there are many reasons for the smooth operation of high-speed rail trains, such as superior EMUs, advanced train operation control system, exquisite seamless rail welding technology, and line conditions with design standards accurate to millimeter It is said that “gta5” will be launched on Google cloud game platform stadia