When an organism is completely encapsulated and preserved, it becomes a fossil, therefore turning into evidence of things that once lived.

A．thereby

B．as a result of

C．so

D．in the end

FMGC的功能是：（）.

A.飞行引导和飞行包线保护

B.飞行管理和飞行包线保护

C.飞行管理和飞行引导

D.飞行包线保护和偏航坐标轴控制