A.10 B.12 C.14 D.16
A.PMSG B.GnRH C.FSH D.LH
A.發(fā)情揭發(fā)牛頭數(shù) B.實(shí)際應(yīng)該參配牛只數(shù) C.全群成母牛頭數(shù) D.產(chǎn)犢牛頭數(shù)