马和骆驼都是哺乳动物，它们都有四只脚，体型也差

马和骆驼都是哺乳动物，它们都有四只脚，体型也差不多大，我们将在这里为它们编写属于它们各自的类，输出相关语句。

例如：一匹阿拉伯12岁的公马，在草原上奔跑的速度为50km/h。

一匹双峰驼20岁的母骆驼，在沙漠上奔跑的速度为40kmh。

class Horse():    def __init__(self, category, gender, age):        self.category = category        self.gender = gender        self.age = age        self.speed = 0    def get_descriptive(self):        self.info = "一匹"   self.category   str(self.age)   "岁的"   self.gender   "马"    def write_speed(self, new_speed):        self.speed= new_speed        addr = "在草原上奔跑的速度为"        print(self.info   "，"   addr   str(self.speed)   "km/h。")class Came1(        ①        ):    def __init__(self, category, gender, age):        super().__init__(category, gender, age)    def write_speed(self,new_speed):                   ②                addr = "在沙漠上奔跑的速度为"        print(        ③        ("马","骆驼")   "，"   addr          ④          "km/h。")horse = Horse("阿拉伯","公",12)horse.get_descriptive()horse.write_speed(50)came1 = Came1("双峰驼","母",20)came1.get_descriptive()came1. write_speed(40)