Question

1. what is the goal of the text? 2. what is the definition of helicopter according to the text? 3. how does a helicopter produce thrust? 4. what are the advantages of helicopter for civilian? 5. what are the advantages of helicopter as military aircraft

Answer 1

1. to describe helicopters in general
2. an aircraft that are powering their rotors to fly
3. they power their rotors so it can lift and thrust
4. police services, emergency medical services, search and rescue missions, news and traffic reporting, etc (paragraph 4 sentence 2)
5. move troops quickly from one to other, etc (paragraph 5 sentence 4 - last)