Which temperatures are taken as the lower fixed point and the upper fixed point for a mercury-in-glass thermometer?
- Alower fixed point: freezing point of mercury; upper fixed point: boiling point of mercury
- Blower fixed point: freezing point of water; upper fixed point: boiling point of water
- Clower fixed point: room temperature; upper fixed point: boiling point of mercury
- Dlower fixed point: room temperature; upper fixed point: boiling point of water