<正>(一) New York is one of the largest American cities to have some of its policemen on horseback.The New York police have 170 horses working in certain parts of the city.The horses are expensive to feed, but it is even more expensive to look after them.Because the horses must walk on the streets,they need special horseshoes.In fact,they need more than 8,000 horseshoes each year.Every police horse in New York gets new shoes every month.Keeping these