题目

血清中含有多种白蛋白和球蛋白，为确定血清中何种成分是抗体，实验将同一动物的正常血清和免疫后的血清进行蛋白质分离并测定含量，其结果如下图所示。下列叙述不正确的是（ ） A.高尔基体参与抗体的加工B.抗体能与相应抗原特异性结合C.抗体是由浆细胞（效应B细胞）产生D.结果说明抗体主要成分是α、β球蛋白I lost my sight when I was four years old by falling off a box car in a freight yard in Atlantic City and landing on my head．Now I am thirty two．I can slightly remember the brightness of sunshine and what color red is．It would be wonderful to see again, but a calamity（灾难） can do strange things to people．It occurred to me the other day that I might not have come to love life as I do if I hadn't been blind．I believe in life now．I am not so sure that I would have believed in it so deeply, otherwise．I don't mean that I would prefer to go without my eyes．I simply mean that the loss of them made me appreciate the more what I had left．The hardest lesson I had to learn was to believe in myself．That was basic．If I hadn't been able to do that, I would have collapsed and become a chair rocker on the front porch for the rest of my life．When I say belief in myself I am not talking about simply the kind of self confidence that helps me down an unfamiliar staircase alone．That is part of it．But I mean something bigger than that: an assurance that I am, despite imperfections, a real, positive person; that somewhere in the sweeping, intricate（错综复杂的） pattern of people there is a special place where I can make myself fit．It took me years to discover and strengthen this assurance．It had to start with the simplest things．Once a man gave me an indoor baseball．I thought he was making fun of me and I was hurt．"I can't use this．" I said．"Take it with you," he urged me, "and roll it around．" The words stuck in my head．"Roll it around! "By rolling the ball I could hear where it went．This gave me an idea how to achieve a goal I had thought impossible: playing baseball．At Philadelphia's Overbrook School for the Blind I invented a successful variation of baseball．We called it ground ball．All my life I have set ahead of me a series of goals and then tried to reach them, one at a time．I had to learn my limitations．It was no good trying for something that I knew at the start was wildly out of reach because that only invited the bitterness of failure．I would fail sometimes anyway but on the average I made progress．【小题1】We can learn from the beginning of the passage that _______A．the author lost his sight because of a car crash． B．the author wouldn't love life if the disaster didn't happen． C．the disaster made the author appreciate what he had． D．the disaster strengthened the author's desire to see． 【小题2】What's the most difficult thing for the author?A．How to adjust himself to reality． B．Building up assurance that he can find his place in life． C．Learning to manage his life alone． D．How to invent a successful variation of baseball． 【小题3】According to the context, “a chair rocker on the front porch” in paragraph 3 means that the author __________ A．would sit in a rocking chair and enjoy his life． B．would be unable to move and stay in a rocking chair． C．would lose his will to struggle against difficulties． D．would sit in a chair and stay at home． 【小题4】According to the passage, the baseball and encouragement offered by the man _____A．hurt the author's feeling． B．gave the author a deep impression． C．directly led to the invention of ground ball． D．inspired the author． 【小题5】What is the best title for the passage?A．A Miserable Life B．Struggle Against Difficulties C．A Disaster Makes a Strong Person D．An Unforgettable Experience