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Nowadays new things appear constantly. Among these, online shoping is approved and accepted by more and more people. people are prefer to purchase by internet. And online shopping has become a fashion. As we all know ,every thing has two sides. So online shopping is no exception. On the one hand, it can save our time. We can make our choice in many kinds of commodities. So every one can find commodity he or her wants to buy. On the other hand ,because we can't contact the commodity, we might be confused by superficial information so as to purchase wrong thing. Security problem also is a challenge. sometimes you has paid for commodity but you can't resive it. As far as i am concerned, we should open our eye biger and purchase online carefully. We should make good use of online shopping.