简述沟通障碍的原因分析？

A. to the top to expel all vapors from the tanks
B. to the top so the operator is certain how much fuel he has aboard
C. with only sufficient fuel for the planned trip so excess gasoline is not carried
D. to near the top with some space allowed for gasoline expansio

A. 坐享其成的过程
B. 信手拈来的过程
C. 纵情享乐的过程
D. 艰苦奋斗的过程

A. 正确
B. 错误