Teacher：We all know that beat causes an object to expand an cold cauese it to contract. Now，can anyone give me a good example?John：Well ，in the summer the days are long，and in the winter the days are short.老师：我们都知道热胀冷缩的道理。现在，谁给我举个例子？约翰：嗯，在夏天天都长，在冬天天都短。Best timeTeacher:When is the best time to pi
前台小姐的超强英语。NB大了.............刚才来了个老外，进到办公室，前台小姐左看右看，大家都在打游戏，只有自己比较 清闲，面带微笑的： 前台小姐：“hello.” 老外：“hi.” 前台小姐：“you have what thing？” 老外：“can you speak english？” 前台小姐：“if i
