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2.2.1 Greetings
Greetings, on the other word, is a kind of way to care about other people’s things, usually we use “hello”, “hi” to ask people. The features of greetings are that it can be used in any occasions, it does not have pertinence. The forms of greetings are fixed and it does not make any sense in actual. The emotional expression is often inadvertently, understandable or perfunctory. The function of greetings is just a shaking hands or a single nod, sometimes it is just a body language.