the rapid development of science and technology has brought about great changes to human life.the great benefits brought about by this progress is hailed in every corner of the world.new electronic appliances have made our life simpler than ever before.new inventions have helped us to organize our daily activities.our job can be done faster.mobiles and qq have made it easier to communicate with other people.internet has enabled us to know and understand other culture and society better.
however,the disadvantages about this development should not be neglected .some of scientific inventions have even caused great harms or disastersto mankind.for example,advanced technology can be easily manipulated by irresponsible persons.besides,we'll be too dependant on it.when technology fails,we are helpless
sometimes,it affects our health and lifestyles(we'll be complacent and lazy.) the chemicals may be hazardous).what's worse,science and tecnology may even destroy our simple and healthy life(sometimes how we miss the traditional style of living!).in addition ,the appearance of new technology may invade our privacy.
to sum up,humans must be alert against the possible harm while enjoying the benefits from them.
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