47.Wilbur Wright (萊特) was born in Millville,Indiana,in 1867.Orville was born in Dayton,Ohio,in 1871.They left school in high school,but they're interested in mechanical (機械的) things.They taught themselves math and engineering. The Wrights became interested in the work of German inventor Otto Lilienthal.Lilienthal designed (設計) and flew on gliders (滑翔機).Lilienthal died in a glider accident in 1896.So the brothers decided to build a flying machine and learn how to control (控制) flight safely. After many experiments,the Wright brothers invented the first safe,successful airplane.But their first flight-Flyer I,on December 17,1903,was not great news.Nothing appeared in the newspaper on that day.A few days later,short reports began to appear in newspapers across the country,but no one seemed very interested. Orville Wright took the"Flyer I"up in the air.It lasted for 12 seconds.Wilbur Wright took turns with his brother flying their airplane.The next two flights each lasted twice as long as the first one.On the fourth flight that day,the airplane stayed in the air for 59 seconds.After it landed,a sudden wind tipped (翻到) the plane over."Flyer I"was badly destroyed.The first successful airplane was never flown again.But those 12 seconds changed history.
76.How did Wright brothers learn math after they left school?
77.What did the Wright brothers decide to do after Lilienthal's death?
78.When did they first fly their airplane?
79.Did their first flight get much attention at that time?
48.我們周圍的環境污染變得越來越嚴重,尤其近來我國多地出現霧霾(smog)天氣,更引發了人們對環境污染的關注.請你圍繞環境保護這一主題,談一談最近這次霧霾天氣里你是如何學習和生活的,列舉出其中至少3項來說明.60詞以上. 1.What did you do at home or school? 2.How did you study for your lessons? 3.What should we do to cut down the air pollution? 注意:短文中不得出現任何真實人名、校名及其它相關信息,否則不予評分.