为小儿作PPD试验,皮内注射皮丘直径为()。
A.<3mm
B.3~5mm
C.6~10mm
D.10~12mm
E.13~15mm
参考答案:C
解析:[知识点] 结核菌素试验
A.10s
B.9s
C.8s
D.7s
The dew point temperature is().
A.always higher than the air temperature
B.always lower than the air temperature
C.equal to the difference between the wet and dry bulb temperatures
D.the temperature at which the air is saturated with water vapor