题目内容：
脊椎动物：哺乳动物（ ）。
A．节肢动物：甲壳动物 B．软体动物：棘皮动物
C．鱼：爬行动物
D．鸟：两栖动物
参考答案：
答案解析：
单选题：脊椎动物：哺乳动物（ ）。
- 题目分类：行政能力
- 题目类型：单选题
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B．软体动物：棘皮动物
C．鱼：爬行动物
D．鸟：两栖动物
B．软体动物：棘皮动物
C．鱼：爬行动物
D．鸟：两栖动物
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