单项选择题
The effective temperature of air is dependent upon（） Ⅰ.relative humidity Ⅱ.air velocity
A.Ⅰonly B.Ⅱonly C.Both Ⅰand Ⅱ D.NeitherⅠnor Ⅱ
When air is at its dew point it is at its（）A.lowest abs...
单项选择题When air is at its dew point it is at its（）
A.lowest absolute humidity B.lowest relative humidity C.highest absolute humidity D.highest relative humidity
The latent heat of water vapor in air is dependent upon...
单项选择题The latent heat of water vapor in air is dependent upon the （）
A.dry bulb temperature B.wet bulb temperature C.dew point D.dry point
If you find an extremely large refrigerant leak while u...
单项选择题If you find an extremely large refrigerant leak while using a halide torch, your flame will（）
A.change from blue to orange B.‘flare up’ and remain lighted C.probably go out D.stay blue
