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1、1,Wang M F 2014-4-8,Science and Technology Are Changing Our Life,2,There can be no doubt that the twentieth century is one of the most remarkable in human history for its previously unparalleled rate of technological advances and scientific discoveries, a rate that continues to this day. In fact, th
2、ere were so many new technologies invented and discoveries made in the last century that its difficult to pare the list down to just the ten. However, now we look back to those ten innovations or technologies that have had the greatest influence on humanityboth positively and the negatively.,3,Nucle
3、ar power was to the twentieth century what steam power had been to the nineteenth: a game changer. Suddenly humanity had a power source that didnt pollute, was efficient and practically unlimited, and so had the potential to change the planet overnight. Unfortunately, it was atwo-edged swordin that
4、this same energy source could be used to create the most destructive weapons in history, threatening human survival with its very presence. However, it is hard to deny the overall positive impact nuclear power has had. The fear of mutually assured destruction probably prevented the world from experi
5、encing a third world war.,10. Nuclear Power,4,10. Nuclear Power,5,10. Nuclear Power,6,10. Nuclear Power,7,Its difficult to imagine our world today without computers. Of course, they have been around since World War Two, but they wereclunky, massively expensive thingsthat had all the calculating powe
6、r of a brick. When Steve Wozniak and Stephen Jobs introduced the Apple in 1976, however, it changed everything and the rest is, as they say, history.,9. The Personal Computer,8,Just as the locomotive made the world a smaller place in thenineteenth century, the airplane did the same for us in the twe
7、ntieth century, shrinking our planet to the point that a person could fly anywhere in the world in a matter of hours.,8. The Airplane,9,8. The Airplane,10,Though under development in Europe during the nineteenth century, the automobile didnt really become a practical and reliable source of transport
8、ation until the twentieth century. 2013, Chinas automobile production and sales both more than 20 million, has been reelected for five consecutive years in the world. The number of private cars in China reached one hundred million.,7. The Automobile,11,In the twentieth century, rockets became bigger
9、 and more powerful. Most importantly, they became controllable, which suddenly made them useful both as weapons of war and, even more vitally, as our means of accessing outer space. Without the rocket, it is safe to say we would not only have never gone to the moon or visited every planet in our sol
10、ar system. Rockets also place satellites into orbit around our planet, so without them we also wouldnt be able to use GPS, predict the weather, make international calls or, for the most part, even use our cell phones much of the time.,6. Rocketry,12,13,5. Telephone,The telephone, wrote Alexander Gra
11、ham Bell in an 1877 prospectus drumming up support for his new invention, may be briefly described as an electrical contrivance for reproducing in distant places the tones and articulations of a speakers voice. As for connecting one such contrivance to another, he suggested possibilities that admitt
12、edly sounded utopian: It is conceivable that cables of telephone wires could be laid underground, or suspended overhead, communicating by branch wires with private dwellings, country houses, shops, manufactories, etc.,14,5. Telephone,15,Until Alexander Fleming discovered penicillin in 1928, almost a
13、ny little bug that someone picked up was potentially fatal. Once penicillinand later a whole range of other antibioticscame on the scene, however, death due tobacterial infectionbecame rare, resulting in a greatly reduced mortality rate and much longer life-span. It also rendered many scourges of th
14、e pastfrom small pox and typhoid to gonorrhea and syphilisobsolete or, at least in the case of venereal disease, something easily treatable. WHO Coordinator for Epidemiology and Burden of Disease Colin Mathers said: The life expectancy worldwide has increased from 64 years in 1990 to 70 years in 201
15、1. The data provided in the report show that Japan, Switzerland and San Marino highest average life expectancy reached 83 years of age,4. Medical advancement,16,I know it destroys brain cells and renders people emotionally and psychologically damaged, but really, where would we be without the boob t
16、ube? It is societys baby-sitter, news source, teacher, entertainer, and story-teller. Worse, most of us would have no idea what to do with our time without it, which is probably the saddest commentary of all.,3. Television,17,While the airplane shrank our planet to the point that one could fly from
17、New York to London in six hours,the internetmade it possible to be there in a few seconds. It allows truth to make it into and out of repressive countries, it foments revolutions, and spreads lies at the speed of light. It also gives anyone the ability to buy and sell almost anything imaginable, fin
18、d and torment old school mates, watch the latest you-tube videos, and even find their perfect life partner, all for a few bucks a month. Oh, and you can also get useful information off it if you dont mind scrolling through 15,000 hits to find out just how long snails really live.,2. The Internet,18,
19、Few people today can appreciate the impact the advent ofradiohad on the twentieth century. Not only did it suddenly make it possible for a person to be heard from hundreds or even thousands of miles away without the use of a wire but it was the center of family life through the end of the Second Wor
20、ld War and into the doldrums of the fifties, when it was gradually replaced by that new-fangled contraption, the television.,1. Radio,19,Comrades and friends, to build an innovation-oriented country, to realize the great rejuvenation of the Chinese nation, all colleagues need to work together and continue our efforts !,