它主要由三个板块构成，首先是欢迎画面，它以蓝色为背景色，中间一个框框，以绿色为填充色，框框上以不同字体，不同大小的英文输出欢迎信息。接着进入做题系统，它是这个程序的核心部分。先是输出两行的介绍信息。然后输入题号，抽取题目。-It is mainly constituted by three sections, first of all, welcome screen, it in blue as the background color, the middle of a frame to the green for the fill color, frame, with different fonts, different sizes of the greeting message in English. Then enter the title system so that it is the core of this process. First, introduction of two lines of output information. Then enter the title number, taken from the title.