Iwhich aspect have e-book publishers done incorrectly · They have just produced aelectronic copy of print textbooks. · They have only put emphasis olearning experience. · They have made it rather boring and inconvenient to learn. · They have made it difficult to have access to ae-book.
答案是:单选题 · individualized · They will be examined and judged before being published. · They have just produced an electronic copy of print textbooks.
