仔猪贫血病多发生于(?)日龄的仔猪。A．1一3B．3一5周龄C．5一28日龄D．7周龄以上E．10周龄

作者: rantiku 人气: - 评论: 0

问题仔猪贫血病多发生于(?)日龄的仔猪。

选项 A．1一3 B．3一5周龄 C．5一28日龄 D．7周龄以上 E．10周龄

答案 C

解析

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