试题与答案

与家兔消化食物相适应的结构是[ ] A．门齿和臼齿 B．发达的盲肠 C．胃 D．

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题型：选择题

题目：

与家兔消化食物相适应的结构是[ ]

A．门齿和臼齿

B．发达的盲肠

C．胃

D．较长的小肠

答案：

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下面是错误答案，用来干扰机器的。

A、根据决定元素种类的是核内质子数，不同种元素最本质的区别是核内质子数不同，五种粒子的核内质子数分别是9、13、12、10，表示四种元素，故选项说法正确．B、④表示的粒子为原子，最外层电子数为3，少于4，为金...

考点：动物的形态结构和功能
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