在我国历史上，蒙古族曾建立了一个疆域空前辽阔的大元王朝。其建立者是（    ）

某中学历史老师在课堂上和学生就19世纪末李鸿章出访俄国这一历史事件进行探讨。学生发言中出现的下列言论与历史事实较为接近的是     

    Mrs. Green doesn't like sports. She has much work to do at home. Her mother is coming this afternoon and she goes to meet her. Near the school she looks at her watch. She has some time. So she goes into the school. Her son isn't in the classroom. She asks a boy and knows they're behind the school. She sees some boys playing there. Her son is there too. She watches them playing and soon she's angry. She takes her son to the wall. “Go home with me, Richard.” She says, "Don't play with them. I can buy a nice ball for you. Then you don't need to scramble for the ball."

图为“中国2015年10月期间发生的某自然灾害分布示意图”．读图，该自然灾害是（　　）

从公元前７世纪到前５世纪，雅典的历次改革中使民主政治最终确立的是