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

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单项选择题

A.lowest absolute humidity
B.lowest relative humidity
C.highest absolute humidity
D.highest relative humidity

单项选择题

A.dry bulb temperature
B.wet bulb temperature
C.dew point
D.dry point

单项选择题

A.change from blue to orange
B.‘flare up’ and remain lighted
C.probably go out
D.stay blue