單項選擇題
A.雞舍溫度B.有害氣體C.定時控制D.雞舍濕度
A.90%B.95%C.98%D.99%
A.早上B.中午C.夜間D.以上都可以
A.1-3B.3-5C.5-7D.7-9
A.10%~15%B.25%~30%C.30%~35%D.35%~40%
A.10%B.12%C.14%D.16%
A.18%B.19%C.20%D.21%
A.5-6B.7-12C.13-15D.16-17
A.20~25℃B.27~28℃C.29~30℃D.33~35℃
A.1%B.1.5%C.2.5%D.3.5%
A.6周齡B.10周齡C.16周齡D.20周齡