题目内容：

Burns are common injuries in our daily life. People can get    1.   by a variety of things, such as hot oil, steam, fire and so on. There are   2.  types of burns—first degree, second degree or third degree, depending on which layers of the    3. are burned. If the burns, especially the third type, are not properly    4.  , they may lead to serious problems. So knowledge of first aid is vitally   5.   .