上周末,小明和爸爸一起看电影。 今天,小明下午四点半要去学吉…

上周末,小明和爸爸一起看电影。 今天,小明下午四点半要去学吉他。 明天,小明去学校跳舞。 后天,小明会在家做作业。 这个星期六,他打算和朋友们去打篮球。 下周末,小明要去表哥家玩电脑游戏。   Question:小明今天几点要去学吉他?(Type Chinese characters and complete sentences)

“A library management system is used to manage the borrowing…

“A library management system is used to manage the borrowing and returning of books. Students can borrow books by presenting their student ID card. The librarian scans the student ID card and then scans the books to be borrowed. The system checks if the student has any overdue books or if the book being borrowed is currently available. If everything is in order, the book is issued to the student, and the due date is recorded. Students can return books by scanning the book’s barcode. The system updates the library database to mark the book as returned.”  Which of the following classes would likely be included in a class diagram for the described library management system?