多数家畜的妊娠信号是一种(?)物质。A．糖类B．激素类C．脂肪类D．甘油类E．蛋白类

作者: rantiku 人气: - 评论: 0

问题多数家畜的妊娠信号是一种(?)物质。

选项 A．糖类 B．激素类 C．脂肪类 D．甘油类 E．蛋白类

答案 B

解析

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