短文改错:

Mark Twain was born in a small town of Horrid. When he is only twelve years old ,his father died .

Late he became a river boat pilot .Mark Twain was her pen name .During the American Civil War

He worked as a reporter and write a lot of stories. Gradually he made his mark and his work were

popular .He became one of the best known writer of the 19th century in the U.S.A .In his life Mark

Twain wrote the number of stories and novels ,on which "Adventure of Tom Sawyer" is most famous

one .His writings have been translated to many other languages ,and they are deeply love by the readers

all over the world .

如图所示，甲、乙两支完全相同的试管，管内装有同种液体，甲管竖直放置，乙管倾斜放置，两管液面相平，设液体对两试管底的压强为p_甲和p_乙，则p_甲       p_乙（填“>”    “<”或“=”）。