Plz fill in the blank:
1.Rotary thermometer
~As the temperature ises, the uneven _________ of the bimetallic strip moves a point around a temperature scale
2.Freezer thermometer
~Range:___℃to___℃
3.Infra-red thermometer
~Range:___℃to___℃
~As the temperature rises, more _______ is emitted by the body and is detected by the termometer
thx very much~!!!