疯牛病在欧洲流行造成很大恐慌，它主要是通过(?)传播的。A．咬伤B．肉骨粉C．空气D．交配E．粪便

作者: rantiku 人气: - 评论: 0

问题疯牛病在欧洲流行造成很大恐慌，它主要是通过(?)传播的。

选项 A．咬伤 B．肉骨粉 C．空气 D．交配 E．粪便

答案 B

解析

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