题目：许多人认为飞机是20世纪最伟大的发明，你是怎么认为的？
首段：引题飞机的发展史；
第二段：飞机的好处——快速；
第三段：飞机的好处——舒适；
第三段：飞机的好处——安全；
最后：否认是20世纪最伟大的发明。
at the beginning of the 20th century, the art of motorzied flying was just starting to take shape, and a century later, at the beginning of the 21st century, the motorized flight has become an irreplaceable means of transportation for modern people.it has immense bearing on our lives.
the airplanes widely used reach the average speed of 500 to 1000 kilometers per hour, indisputablely the fastest means of transportation. they are 20 times faster than ships, 7 times than cars, and 5 times than trains. in a world like ours where efficiency is second to none ,taking airplanes sounds fantastic.www
taking airplanes is more comfortable. passengers are free from the fatigue they may suffer when traveling by bus or train, and the cosy, noi -free cabin and the first-class servere offered both in terms of food and entertainment, convinces people that it is well worthy of paying more for it.
the mass media which are only too happy to cover the reports on air crashes occasionally occurring around our world may mislead the readers that taking flight is dangerous. actually the flight trip is considerable safer than road trip.
however, it would be termerity to claim that the motorized flight is an invention unmached by others. after all, it works in traveling alone. computer technology has introduced inventons like internet , which tend to eliminate the traveling. besides, nuclear energy, penicillin, mobile phone, credit card, hybrid rice breeding, tv set ,to name but are few, are all deniable inventions extremly important for human being.
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