The center of gravity is the point at which an airplane would balance if suspended.
选项:
A:If an airplane is suspended, it would balance at the point called the center of gravity
B:The center of gravity is the point of an airplane. it would hardly balance if suspended.
C:If an airplane is hung, it wouldn't balance at the point called the center of gravity.
发布时间:2024-06-17 14:34:12