在车上通过车辆控制面板上的制动切除旋钮可对拖车常用制动和停放制动进行切除。
参考答案：错
当血液中维生素A含量过低时，将影响（）的合成，可引起夜盲症。
All of us went to the park ______ Bob. He had to look after his sister.
A．besides
B．with
C．except
D．around
