Part3 Practice on Text Task 1: Listening training Dictation of some key words Directions: You will hear some key words twice, most of which are taken from the Word Study. Then finish the Crossword Puzzle. ( See you book p. 2. Dictation of some key expressions Directions: You will hear some key expressions twice, most of which are taken from this text. Then you are asked to complete the missing words 1) digitalmessages 4) data link management 2)signal power 5)a multipoint data link system 3)transmission lines 6) digital-to-analog converter 2021/2/20 P.6
2021/2/20 P.6 Task 1: Listening training Dictation of some key words Directions: You will hear some key words twice, most of which are taken from the Word Study. Then finish the Crossword Puzzle. (See you book p. ) 2. Dictation of some key expressions Directions: You will hear some key expressions twice, most of which are taken from this text. Then you are asked to complete the missing words. @ Part3 Practice on Text 1) _____________messages 2) signal_______________ 3) transmission____________ 4) ________________management 5) ______________data link system 6) digital-to-analog_____________ digital power data link a multipoint lines converter
Task 2. Read. Write and Translate Read and Reply Directions: Students are required to read aloud the whole text after the teacher. Then give short answers to the following questions a)What does data comunmunication concern? Data Communications concerns the transmission of digital messages to devices external to the message source b)What is the final purpose of data communication system? To provide the highest possible transmission rate at the lowest possible power and with the least possible noise c)What device must be used when one transmits data by a digital channel? A Pulse Code Modulation(PCM)equipment must be used 2021/2/20 P7
2021/2/20 P.7 Read and Reply Directions:Students are required to read aloud the whole text after the teacher. Then give short answers to the following questions: a) What does data comunmunication concern? b) What is the final purpose of data communication system? Task 2: Read, Write and Translate Data Communications concerns the transmission of digital messages to devices external to the message source. To provide the highest possible transmission rate at the lowest possible power and with the least possible noise. A Pulse Code Modulation (PCM) equipment must be used. c) What device must be used when one transmits data by a digital channel?