题目

In 1995，Oseola McCarty gave a present of $150 000 to the University of Southern Mississippi. She wanted to help poor students. It was a very generous thing to do. But her friends and neighbors were surprised. McCarty was a good woman. She went to church. She was always friendly and helpful. But everyone in her town knew that McCarty was not rich. In fact，she was poor.How did a poor 86-year-old woman have so much money？ Oseola McCarty was born in 1908 in Hattiesburg，Mississippi. She had to leave school when she was eight years old to help her family. She took a job washing clothes. She 如图，菱形ABCD的边长为10cm，DE⊥AB，sinA=，则这个菱形的面积=    cm2．