The author passed by the hitchhiking young man in the desert because he was sure that someone else would stop for him.

Y染色体退化的经典解释理论有以下模型： A: Muller’s Ratchet B: Genetic Hitchhiking C: Ruby in the Rubbish D: Pseudogene model

Read the following passage and answer the questions within ten words.Isn’t it amazing how one person, sharing one idea, at the right time andplace can change the course of your life’s history? This is certainly whathappened in my life. When I was 14, I was hitchhiking from Houston,Texas, through El Paso on my way to California. I was following mydream, journeying with the sun. I was a high school dropout with learningdisabilities and was set on surfing the biggest waves in the world, first inCalifornia and then in Hawaii, where I would later live.　Upon reaching downtown El Paso, I met an old man, a bum, on thestreet corner. He saw me walking, stopped me and questioned me as Ipassed by. He asked me if I was running away from home, I supposebecause I looked so young. I told him, “Not exactly, sir, since my fatherhad given me a ride to the freeway in Houston and given me his blessingswhile saying, ‘It is important to follow your dream and what is in yourheart, Son.’”　The bum then asked me if he could buy me a cup of coffee. I toldhim, “No, sir, but a soda would be great.” We walked to a corner maltshop and sat down on a couple of swiveling stools while we enjoyed ourdrinks.　After conversing for a few minutes, the friendly bum told me tofollow him. He told me that he had something grand to show me andshare with me. We walked a couple of blocks until we came upon thedowntown El Paso Public Library.　We walked up its front steps and stopped at a small informationstand. Here the bum spoke to a smiling old lady, and asked her if shewould be kind enough to watch my things for a moment while he and Ientered the library. I left my belongings with this grandmotherly figureand entered into this magnificent hall of learning.　The bum first led me to a table and asked me to sit down and waitfor a moment while he looked for something special among the shelves. Afew moments later, he returned with a couple of old books under his armsand set them on the table. He then sat down beside me and spoke. Hestarted with a few statements that were very special and that changed mylife. He said, “There are two things that I want to teach you, young man,and they are these:　“Number one is to never judge a book by its cover, for a cover canfool you.”He followed with, “I’ll bet you think I’m a bum, don’t you,young man?”　I said, “Well, uh, yes, I guess so, sir.”　“Well, young man, I’ve got a little surprise for you. I am one of thewealthiest men in the world. I have probably everything any man couldever want. I originally come from the Northeast and have all the thingsthat money can buy. But a year ago, my wife passed away, bless her soul,and since then I have been deeply reflecting upon life. I realized therewere certain things I had not yet experienced in life,one of which waswhat it would be like to live like a bum on the streets. I made acommitment to myself to do exactly that for one year. For the past year Ihave been going from city to city doing just that. So, you see, don’t everjudge a book by its cover, for a cover can fool you.　“Number two is to learn how to read, my boy. For there is only onething that people can’t take away from you, and that is your wisdom.” Atthat moment, he reached forward, grabbed my right hand in his and putthem upon the books he’d pulled from the shelves. They were thewritings of Plato and Aristotle—immortal classics from ancient times.　The bum then led me back past the smiling old woman near theentrance, down the steps and back on the streets near where we first met.His parting request was for me to never forget what he taught me.　I haven’t.　1. What is the denotation of the title?2. Why did I drop out from high school and begin the journey?3. What does “information stand” mean?4. Why did the bum say “never judge a book by its cover”?