尽管压力降低,活门必须保持关闭。( )
A.Despite the pressure decreases, the switch must stay closed. B.Although the pressure decreases, the valve must stay closed C.In spite of the decrease of the pressure, the door must stay closed.正确答案B
尽管压力降低,活门必须保持关闭。( )
A.Despite the pressure decreases, the switch must stay closed. B.Although the pressure decreases, the valve must stay closed C.In spite of the decrease of the pressure, the door must stay closed.正确答案B
