题目

已知 与 相似，且 ，那么下列结论中，一定成立的是（ ） A . B . C . 相似比为 D . 相似比为 答案：D1．Without any hesitation，he said，"I'd be better off dead．"Hearing those words come out of my best friend's mouth tore my heart apart．He has repeated that phrase more than once，and my mind continually plays it over like a voice recording．    I met him about three years ago．After knowing me for six months，he told me about his struggles with depression．Sadness was not the only emotion that came over me；I was shocked．He seemed so outgoing and happy all the time．I soon learned that he was physically and emotionally abused as a young child，causing him to have suicidal（自杀的）thoughts．    He refuses to talk to others about his depression because he now distrusts adults，especially those in his family．Nevertheless，he feels as if I understand him and that I know the right words to speak．Therefore，when it comes to helping him，convenience is not in my vocabulary．It does not matter where I am or what I am doing，for he always comes first．    Many students at his school laugh at him when they notice scars on his arms from cutting．As he sees it，other kids have every right to make fun of him．But no one holds such a right，so I encourage him to ignore the heartless kids who treat him badly．When he feels the weight of judging eyes or hateful voices，I always remind him that I care about him unconditionally．Just hearing me say I will always be his best friend seems to give him the security he needs to keep on going．    My best friend once told me that if he had not had me，he would not be alive．He said that my encouraging words convinced him not to take his life．Our friendship has taught me that a single kind word can influence someone's life．With the fragility（脆弱）of life as it is，I believe in the necessity of encouragement．56．According to the first paragraph，what the author's friend said made the author feelB．A．puzzled      B．heart broken．C．frightened   D．hopeless57．By saying"convenience is not in my vocabulary"，the author meansA．  A．he is always ready to help his friend  B．he hardly spares time to help his friend  C．he has no good excuse for refusing his friend  D．he is not good at communicating with his friend58．From the passage we learn that the author's friendC．  A．had a happy childhood but everything changed later  B．wanted to share his story but no one listened  C．took it for granted that he was made fun of  D．was always of sad appearance59．What does the author learn from his experiences？B  A．How to make a big difference to others．    B．The importance of encouragement．  C．How to get rid of depression．              D．The necessity of security．