There is a constant tension in an oligopoly between cooperation and self-interest because after an agreement to reduce production is reached, it is profitable for each individual firm to cheat and produce more.
【简答题】Weather changes when the temperature and the amount of water in the atmosphere changes. We can see and feel water coming from the atmosphere when we have rain. But the water must somehow get back to ...
【单选题】—— 一 The water changes into thick ice covering rivers and lakes in winter in Harbin. ———____________ in Urumqi and children go skating on it then .