锅炉的蒸发系统不包括( )。
A．自然循环锅炉
B．强制循环锅炉
C．对流锅炉
D．复合循环锅炉
参考答案：C
I want to buy that kind of cloth because I ________ the cloth_______ well.
A．have told; washed
B．have been told; washes
C．have been told; is washed
D．was told; is washed
如果MFD上没有燃油流量指示，则可能是（）
A、燃油流量传感器或ECU故障
B、燃油流量传感器或DCU故障
C、燃油流量传感器、DCU或ECU故障
D、以上全不正确
