管系由水系统板、温水箱和中间水箱组成。水系统板由水泵、过滤器、排水阀和冲洗阀等组成。中间水箱容量为7L，温水箱容量为8L。
参考答案：错
肾性骨营养不良症
You are backing on twin engines with rudders amidships，when your port engine stalls.To continue backing on course，you should（）.
A.Apply left rudder
B.Apply right rudder
C.Increase engine speed
D.Keep your rudder amidships
