在下面一段文字横线处补写恰当的语句，使整段文字语意完整连贯，内容贴切，逻辑严密，每处不超过15个字。

    现在不少大学生课堂上用手机拍摄教学内容，不想用笔记。但很多世界知名的大学有明确规定，①____。斯坦福大学教室的现代化教学设备应有尽有，然而很多学科的教学完全不用电脑，②____，就是老师在黑板上用粉笔板书，学生记笔记。斯坦福的老师为什么坚守传统？这是由学科的性质决定的。像数学这种课程，如果老师只是展示事先准备好的PPT，学生就没有机会领悟推导的过程，再加上自己不动手抄写，上课内容成了过眼烟云。③____，结果根本无法掌握好这些学科。

阅读理解

    Marlene Dietrich is finally to be honored by her home city, Berlin.

    For more than half a century, the famous film star won huge fame in Hollywood, but remained a highly controversial（引起争议的） figure in Germany.

    When the city's new film museum is opened on September 26, three of its 15 rooms will show the star's possessions collected over a lifetime.

    In addition to various collections by Marlene, visitors will be able to see all Marlene Dietrich's movies. There will also be key except for a vast range of Germany-made films.

    Dietrich became a world star after her wonderful performance in a movie. After that, she turned her back on Germany, horrified by the sudden movement of Nazi in her hometown.

    A few years after the war, the star was persuaded to pay a short visit to Berlin. But the trip proved a disaster. At a city hall gathering in West Berlin, crowds turned out to see her, but not all friendly.

    She was attacked at times. She found herself being blamed for wearing an American uniform during the war to please U.S. troops in Europe. She was also scolded for "turning her back on the country".

    Dietrich, deeply hurt, decided she would never return to Berlin again. But she softened her judgment.

    When she died in Paris in 1972, it was at her express wish that her body should be sent back to Berlin for burial alongside her mother in a local cemetery.

读台湾铁路、城市和物产分布图，回答问题。