新书一发下来,我的整张桌子都满了,上课找书很不方便。我想发明一种智能课桌,它一共分三层:第一层放教科书,第二层放作业本和笔,第三层放课外书。只要在课桌旁的书写板上写出第几层和书名,课桌就会将书弹出来。不用的时候,主人将书从旁侧放进桌内,课桌就会把书收得整整齐齐。它在工作时是不会发出声音的,这样就不会影响同学们上课了。怎么样,我发明的课桌是不是学习的好帮手? The new book came down, my whole table is full, school is not easy to find a book. I would like to invent a smart desk, which is divided into three layers: the first layer of textbooks, the second layer of homework and pen, the third layer of extracurricular books. As soon as you write the first few layers and the title on the writing board next to the desks, the desks will pop the book out. When not in use, the owner will put the book from the side into the table, the desk will receive the book neatly. It does not make a sound at work, so it will not affect the classmates. How, I invented the desk is not a good helper to learn?