WHY WAS "DISSYMMETRY" IMPORTANT TO THE EARLY PIONEERS OF...
42. Why was "dissymmetry" important to the early pioneers of helicopter flight? A. It allowed helicopters to lift from the ground. B. It equalized lift on each side of the central shaft. C. It allowed the rotor blade angles to be altered. D. It was an effect that caused helicopter to crash.
Bạn đang xem 42. - File thứ 1: De va dap an thi thu lan 2, Anh
![Đáp án tham khảo 42. - File thứ 1: De va dap an thi thu lan 2, Anh](https://www.traloihay.net/traloihay/question/answers_table/2022/02_07/620095eb83ac8.webp?v=20220420142246)
![Đáp án tham khảo 42. - File thứ 1: De va dap an thi thu lan 2, Anh](https://www.traloihay.net/traloihay/question/answers_table/2022/02_07/620095ebb730e.webp?v=20220420142246)