An instrument that maintains a continuous record of humidity changes is called a().
A、A.thermometer
B、B.barometer
C、C.hygrograph
D、D.thermograph
A、A.thermometer
B、B.barometer
C、C.hygrograph
D、D.thermograph
A、used to measure the speed of wind B、in which the pressure of air is measured C、
A、used to measure the speed of wind B、in which the pressure of the air is measured C、
A、A.weather v
A、a line on a weather map connecting equal points of both temperature
A、charted record of atmospheric temperature over time B、charted record of atmospheric pressure over time C、graphic record of combustible gases measured in