加热炉风机自停，加热炉（）。
A．冒白烟
B．炉膛温度上升
C．冒黑烟
D．炉膛温度下降
参考答案：C
I have got to the point ________ I must adjust myself to the new life. [ ]
A. what
B. which
C. where
D. that
电流速断保护
