题目

How successful leaders spent their teenage years I don’t think I have ever before been compared with Bill Gates, Steve Jobs, etc.  16 But for what it is worth, I’ll give you some traits that I think are common among most of these people. Reading Read a wide variety of books and articles that stretch your imagination. Don’t just read easy books (like Harry Potter).  17 Those difficult texts can really stretch your mind. Because most of the people mentioned grew up in a different era, they spent a big portion of their time just reading the encyclopedia. Many of them would eventual如图，在△ABC中，∠ACB=90°，D是BC的中点，DE⊥BC，CE∥AD．（1）求证：四边形ACED是平行四边形；（2）若AC=2，CE=4，求四边形ACEB的周长．