与下图人物有关的史实是（    ）

①统一了蒙古各部，建立了蒙古汗国

②创立的行省制度对后世影响深远

③重视农业生产，鼓励人民开荒种粮，推广棉花种植技术

④建立了元朝，结束了唐末以来国家分裂的政治局面

把地球划分成东、西半球的经线圈是                    （   ）

李先生体检时，发现尿液中含有大量的葡萄糖，则他的体内发生病变的部位可能是（　　）

请和你的同学一起讨论讨论，找出答案。

    Tom, Sam, Jim and Jack live in a building of four floors. They live on different floors. They have different jobs―an engineer, a worker, a teacher and a doctor. Tom lives above Sam, but below(在下面) Jim. Jack lives on the third floor. The doctor lives above the teacher, but below the worker. The engineer lives on the ground floor. What are their jobs? Which floor does each of them live on?