题目内容
(请给出正确答案)
[单选题]
母猪发情周期一般为()天,平均为()天,母猪怀孕周期为()天
A.20-24,21,114
B.20-28 ,25,114
C.18-24 ,21,114
D.15-18 ,16,114
答案
C、18-24 ,21,114
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A.20-24,21,114
B.20-28 ,25,114
C.18-24 ,21,114
D.15-18 ,16,114
C、18-24 ,21,114