A.下降 B.提高不變
A.88% B.80% C.70%
A.開動時(shí)數(shù)/日歷時(shí)數(shù) B.開動時(shí)數(shù)/開動臺數(shù) C.可開動時(shí)數(shù)/日歷時(shí)數(shù)