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QUESTION ONE: with more and more people moving into the city, the primary transportation can ’ t satisfy the transition of the population. I t results that the improvement of the transportation to create some more efficient vehicle. H igh speed railway was born. H igh speed railway can shrink the time we used to spend. T he speed of that kind of railway can reach about 290 km/h.
QUESTION TWO: the electric grids were built at Sichuan. I ts advantage is to save the electric energy using the high voltage transmission. But the job for maintenance is very dangerous, which should work at an extremely high attitude. A nother one is a kind of cargo ship which is equal to two football fields long. Its work is to transport the fossil fuel to everywhere in China.
QUESTION THREE: the fast changes bring something useful also give us the problems about the pollution. A s we all know, pollution can be harmful to the health of people. T he pollution will produce haze to cover the sky and sunshine. P ollution also brings PM 2.5 to our lives. A ll of these will bring harm to people.
QUESTION FOUR: first, it is wind energy which is built in Sinkiang. T here is a wind power plant and more than 80 generators in it. F rom 2004 to 2014, the number of generators increased by two times per five years. A nother kind of new energy is solar energy. A t Tibet Plateau, there is a Solar Parks.