此系统用于伸出或收回起落架
A.This system is used to expand and return the landing gear B.This system is used to extend and retract the landing gear. C.This system is used to extract and retract the landing gear.正确答案B
此系统用于伸出或收回起落架
A.This system is used to expand and return the landing gear B.This system is used to extend and retract the landing gear. C.This system is used to extract and retract the landing gear.正确答案B