Today is the 21stcentury, as the highly developed of technology, we facilitate our life with all kinds of newly invented products, such as computer, digital camera and so on. The technology products indeed brings us convenience, the old way of doing things has been challenging. Before, people like to write letters to say hi to others or send letters to give people information, while today, people can use smart phone or computer to call others quickly, that saves a lot of time. Does the way of...