An aircraft has five main structural units which consist of the fuselage,the wings,the stabilizers, the flight control surfaces and the landing gears. ( )
A.一架飞机包括五个结构单元,它们是机身,机翼,副翼,升降舵和起落架 B.一架飞机包括五个结构单元,它们是机身,机翼,安定面,飞行操纵舵面和起落架。 C.一架飞机包括五个结构单元,它们是机头,机翼,副翼,升降舵和起落架正确答案B
