当箱内温度过高或过低时，可通过调整（）螺钉实现正常。
A、温差调节
B、温度范围调节
C、化霜温度调节
D、停车温度调节
参考答案：A
— Everything begins hard. Don't hesitate to ____ me if you are in difficulty.
— Thank you. I will. [ ]
A. turn out
B. turn in
C. turn to
D. turn on
