钟在5时的时候，它的时针和分针成____角。

   Mr. Li worked in a post office in Weihai. Last month he retired. His son works in America. Five years ago Mrs. Li went to America to look after their grandson. So Mr. Li decided to see them.
   Mr. Li was afraid of taking the plane so he decided to go to America by ship. On the first morning on the ship, Mr. Li met an American. The man said to him, “Good morning!” Mr. Li thought the man told him his name. So he said to him, “Li Haitao.”
   On the second morning, Mr. Li met his son’s friend on the ship. He told him about the American. After hearing that, his son’s friend laughed and said, “He said hello to you in the morning.”
   On the third morning when Mr. Li met the American again, he said, “Good morning!” And the American said to him, “Li Haitao, sir.”

课内现代文阅读，回答相关问题。
        ①汤恩伯认为南京江阴段防线是很巩固的，弱点只存在于南京九江一线。②不料正是汤恩伯到芜湖的那一天，东面防线又被我军突破了。③我东路三十五万大军与西路同日同时发起渡江作战。④所有预定计划，都已实现。⑤至发电时止，我东路各军已大部渡过南岸，余部二十三日可以渡完。⑥此处敌军抵抗较为顽强，然在二十一日下午至二十二日下午的整天激战中，我已歼灭及击溃一切抵抗之敌，占领扬中、镇江、江阴诸县的广大地区，并控制江阴要塞，封锁长江。⑦我军前锋，业已切断镇江无锡段铁路线。