如图，BD，CE分别是△ABC的高，且BE=CD，求证：Rt△BEC≌Rt△CDB．

    Look at the picture. Who is the girl? She is my friend. Her name is Alice Black. She is an English girl.

    Alice has a big family. Her grandparents have two daughters and one son — her father. Alice lives with her grandparents, parents, two brothers and one sister. Alice has two dogs — Bobby and Tony. Bobby is black and Tony is white. Alice likes them very much. Alice is a middle school student. She has a good friend at school. Her name is Helen. They are cousins, too.

“三个代表”重要思想是***的立党之本，执政之基，力量之源。它创造性地回答了（  ）