一 A stranger is walking ahead of us.

一 No. It's not a stranger. It's Mike's father.

 材料一：******在十八届中央纪委二次全会上发表重要讲话强调，要从严治党，既坚决查处领导干部违纪违法案件，又切实解决发生在群众身边的不正之风和腐败问题。要坚持“老虎”、“苍蝇”一起打。要善于用法治思维和法治方式反对腐败，加强反腐败国家立法，加强反腐倡廉党内法规制度建设，让法律制度刚性运行。
材料二：村民李某为响应国家的反腐行动，把村长贪污的事实写成大字报在村中各处张贴，广而告之。 

如图是某地下商业街的入口，数学课外兴趣小组的同学打算运用所学的知识测量侧面支架的最高点E到地面的距离EF．经测量，支架的立柱BC与地面垂直，即∠BCA=90°，且BC=1.5m，点F、A、C在同一条水平线上，斜杆AB与水平线AC的夹角∠BAC=30°，支撑杆DE⊥AB于点D，该支架的边BE与AB的夹角∠EBD=60°，又测得AD=1m．请你求出该支架的边BE及顶端E到地面的距离EF的长度．

根据短文理解，选择正确答案。

    An old lady in a plane had a blanket（毯子）over her head and she did not want to take it off. The air hostess spoke to her, but the old lady said, “I have never been in a plane before, and I am frightened. I am going to keep this blanket over my head until we are back on the ground again!”

    Then the captain came. He said, “Madam, I am the captain of this plane. The weather is fine, there are no clouds in the sky, and everything is going very well. ”But she continued to hide.

    So the captain turned and started to go back. Then the old lady looked out from under the blanket with one eye and said, “I am sorry, young man, but I don't like planes and I am never going to fly again. But I'll say one thing,” She continued kindly, “You and your wife keep your plane very clean!”

国家的产生和形成是一个漫长的过程。请结合下列材料回答问题。

【王朝更替我知道】

材料一：夏商周三代是中国古代文明形成与发展的重要时期……商、周政权的更迭如同夏、商政权的更迭一样，也是通过大规模战争实现的。

【制度变革我分析】

材料二：