题目说明

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)

评分标准

（1）Horse；（2分） （2）self.speed= new_speed；（2分） （3）self.info.replace；（4分） （4）str(self.speed)。（2分）