Unit 5 first aid课件 新人教必修5
Unit 5 first aid课件 新人教必修5第3页

Fast-reading:

___ the three types of burns ___ what to do if someone gets burned ___ the functions of skin ___ the characteristics of burns ___ how we get burns

symptom n.

In which order are those topics covered in the text? Number them by reading the first paragraph and the subtitles.