英国的牛津与法国的格勒诺布尔有几处相似?怎么回答饿0.0 还有 What do people usually do in the cities or towns which have town twinning agreements? For whom are towntwinning agree meets are most useful?签订过友好城市协议的城市，市民们一般做什么？友好城市协议对于什么人最有用？