英国学者李约瑟在他所著的《中国科学技术史》序言中说：“中国的这些发明和发现往往远远超过同时代的欧洲，特别是在十五世纪之前更是如此。”“中国的这些发明和发现”为欧洲新兴资产阶级在军事上战胜本国封建势力提供条件的是(  )

     Madison Stump is a 13-year-old entrepreneur (企业家) in the USA. To save our planet, she has  1a green business, PaperAgain.
Madison lives in a “green” family. She is  2 trying to be 100% earth friendly. One day, Mandison was thinking over what else she could do to help the environment.  3, she thought, “Why not  4those used boxes and paper to create beautiful notebooks? And I can sell them to help people in need.” That night, Mandison made her first notebook with scrap paper (废纸), and she used an empty gum box for a 5 . It was the 6  of her green business.
     Mandison's first customer was her sister. She, of course, never   7  it! However, Mandison didn't mind because she got to see her use it. Before you know it, all Mandison's school friends were asking to buy the amazing notebooks. Then, Mandison's dad came up with the  8 idea of starting a website, PaperAgain.com, so that these notebooks could be bought online.
     Now Mandison is the  9  of a real business! Her notebooks are selling at the store in her hometown. And she is often  10  on the local television news!

《送东阳马生序》中，全文的中心是（或：写作此文的目的）：____。《送东阳马生序》中，点明作者写作此文的原因的语句是：____，____。