A.50% B.40% C.30% D.20%
A.70% B.80% C.90% D.100%
A.空氣風(fēng)冷(AN)和強(qiáng)迫自冷(AF) B.空氣自冷(AN)和強(qiáng)迫風(fēng)冷(AF) C.空氣自冷(AF)和強(qiáng)迫風(fēng)冷(AN) D.空氣風(fēng)冷(AF)和強(qiáng)迫自冷(AN)