2. The three-line table format of the paper requires a table order and title, an item column, a table body, etc. Preface and topic. The table order is the serial number of the table. For papers, the order of tables is in the order in which they appear in the paper, and they are numbered consecutively with Arabic numerals starting from "1", such as "Table 1" and "Table 2".
3. Font size: the preface and title of the first level are bold in small three; The preface and title of the second level are in bold type 4; The order and title of Grade 3 and below are the same as those of Grade 2, and the text is Grade 4.