Согласитесь или не согласитесь со следующими утверждениями. Обоснуйте свое мнение

1. The ailerons are moved left and right to make an airplane roll. (I Agree/Disagree because………..)
2. Very few commercial airplanes are powered by piston engines. (I Agree/Disagree because………..)
3. The undercarriage is retracted before landing and extended into the gear bay after takeoff. (I Agree/Disagree because………..)