使用热导检测器时，停载气前应先停（），否则会烧坏热导池内金属丝
参考答案：桥路电流
—_____.
—Yes, I want a dress for my daughter. [ ]
A. What's the price of it?
B. Do you want something?
C. Can I help you?
简述新加坡小学开设公民道德教育课程的宗旨。
