试题:
积累资料。  
       请你课下广泛地收集资料,看一看大干世界中还有哪些动物之间有共栖现象?还有哪些动物之间是天敌呢?     
动物之间有共栖现象:                                                                                                                        
                                                                                                                                                            

动物之间是天敌现象:                                                                                                                         
                                                                                                                                                            
文史常识 2016-05-26

答案:

我来补答
共栖:马来西亚的文鸟和蜜蜂
天敌:羊和狼是天敌
(答案不唯一)
 
 
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这些题目你会做吗?