A font is the reference of size, weight, and style of a particular text. The weight of a particular font is the thickness of the character outlines. Size is typically measured in points, which is a ...

点击菜单“借阅”选项，进入借阅界面，输入书名、用户名及密码，点击“借书”按钮，系统访问存储书籍的文件（books.txt ...