题目内容
Passage Three Questions 33 to 35 are based on the passage you have just heard.
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Acid rain may damage trees, soils and accelerate the decay of buildings.
W: There are many interesting stories about how a baby learns to say its first word. Now, Mark, would you like to share your story with usM: OK, here is my story. I was about 18 months old, I think. And I had just started saying my first word. Every time a truck went by, I shouted a word that sounded like "truck", but to everyone else it sounded nothing like it. My parents tried to correct me, but failed. Then about 3 months later, we traveled to New York.As we were waiting for our plane at the airport, I looked out of a huge window. At that very moment, I saw the largest truck in the world. I had to tell someone about this. I turned to my father, who was standing next to about a thousand people waiting for flight, and screamed "Truck! Truck!" My father tried hard to shut me up, but I was so excited and I kept screaming my special word. My poor mother decided that she didn’t know this baby and ran to the lady’s room where she hid until I finally stopped. Well, I was talking like a normal child. However, my parents will never forget the very first word I produced in my life. What is the first word the baby to say（）
假设信源是由g个离散符号S1，S2，…，Si，…，Sq所组成的符号集合，集合中的每个符号是独立的，其中任一个符号Si出现的概率为P(Si)，并满足∑P(Si)=1。那么符号Si含有的信息量：I(Si)等于 (17) ，单位是 (18) 。
程序设计语言Lisp与Prolog分别是 (41) ，它们的理论基础分别是 (42) 它们的数据结构分别是 (43) ，它们的程序形式分别是 (44) ，主要应用于 (45) 。
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