Three-line tables are mainly composed of preface, title, header and text, and some tables have notes.
The arrangement of the three-line table does not conform to the longitudinal readability. Generally, the table layout is that the content and test items are read horizontally from left to right, and the data are arranged vertically in order, that is, the table layout of three lines should follow the principle of vertical reading. In other words, the values of each row in the same column in the table body are under the same heading.