目   录：

有能啃石头的嘴吗？                                                                                                                                    

动物也要换牙吗？                                                                                                                                         

长着獠牙的海象会吃人吗                                                                                                                           

昆虫有几种嘴？                                                                                                                                              

哪只鸟长着像吸管一样的嘴？                                                                                                        

谁用利齿在海中称王称霸？                                                                                                                        

蚊子的嘴是怎样叮进肉里的呢？                                                                          

谁的嘴巴长着带刺的舌头？                                                                                                            

毒蛇的牙齿会致命吗？                                                                                                            

陆地上谁的嘴巴最大？                                                                                                   

是谁长着锯齿一样的嘴？                                                                                               

哪些动物长着长长的舌头？                                                       

可以凿木头的嘴到底有多硬？                                                                                               

哪个动物长着琵琶一样的扁嘴？                                                       

哪种动物在食道里长牙？    

是谁长着小船一样的大嘴？                                                                                                   

谁的牙齿会不停地疯长呢？                                                                                                                        

水蛭是靠嘴咬住我们不放的吗？                                                       

为什么动物张开的嘴能比身子还大？                                              

兔子为什么是三瓣嘴？                                                                                                                                  

……