Make a correct choice according to the questions provided: 答案填大写字母 1) What does Strength One of the radiotelephony emission mean? a) Unreadable. b) Readable now and then. c) Readable but with difficulty. 2) When is the radio check made? a) When the aircraft is about to depart. b) When the aircraft is airborne. c) During maintenance work on the ground. 3) Which one of the following statements is correct for a test transmission by an aircraft which is about to depart? a) Tower, this is BAW179, maintenance check on 126.5. How do you read? b) Tower, this is BAW179, pre-flight check on 126.5. How do you read? c) Tower, this is BAW179, signal check on 126.5. How do you read? 4) Your reception from ground station transmission is fading away and you can only hear the text intermittently. What should your reply to the station? a) Readability one. b) Readability two. c) Readability four. 5) Which of the following statements is correct? a) Tower, this is BAW179, radio check, out. b) Tower, this is BAW179, radio check, over. c) Tower, this is BAW179, radio check, roger.