Lesson21 Books or Computers?,Unit 4 The Internet Connects Us,rinting press n. 印刷机 machine n. 机器 modern n. 现代的 which pron. 哪一个；指提到的事物,New words,sell,electronic book,modern city,1. Before the printing press, books were written _ 2.Information began to travel much faster and _.,much farther,by hand,The printing press is a machine. It can make lots of books in a short time.,How were books made before the printing press?,Books were written by hand.,Which one did more to change the world, printing pre
