A.100 B.90 C.80 D.70
A.空氣溫度20±3℃,相對(duì)濕度≥90% B.空氣溫度20±3℃,相對(duì)濕度60-80% C.空氣溫度23±2℃,相對(duì)濕度50±5% D.空氣濕度20±5℃,相對(duì)濕度≥90%
A.1 B.2 C.3 D.4