老师
Hello everyone. I'm from Chaoyang Foreign Language School. Today we are going to continue learning Unit 4, information technology. Please get your book, pen and notebook ready. Our job today is to do listening and speaking with the topic of apps. So what does app mean? In a dictionary? It is the short form for application, software application. It means a program designed to do particular job. So what apps do you often use and what do you use them for? You can use the phrases to help you make notes.
老师
for example， i often use 铁路。 1,2,3,0,6. To book train tickets, I sometimes need to use Baidu Map to find directions. So how about you can share with your partners? Apps are definitely so popular nowadays and we kind of can't live without it. So have you ever thought why apps are so popular? What difficulties in developing an app programmers might meet with? And what latest technologies are used in apps? You can think about them now and talk with your partners. The phrases on page 12