题目

 听材料，回答问题。 Okay, before we continue, does anybody have questions? Oh, Sally?<br />Mr Cook, you talked about the Fibonacci sequence in your last class, but I was sick so I missed<br />it. I don't understand it. Can you explain it to me?<br />Of course. What do you want to know?<br />I hope this isn't a silly question, but what does Fibonacci actually mean?<br />No question is ever silly. People become learned by asking questions. Fibonacci is the name<br />of a person who is considered to be one of the most talented mathematicians of the Middle<br />Ages. So, what is the Fibonacci sequence?<br />It's a sequence of numbers introduced by Fibonacci. They are 0, 1, 1, 2, 3, 5, 8 and so on. Do you<br />see how it works?<br />I have no idea.<br />Let me show you. The first number is 0 and the second number is 1. Starting the third<br />number, each number is the sum of its previous two numbers. So the third number is 0 plus<br />1, which is 1. The fourth number is the second number plus the third number. 1 plus 1 is<br />2. The fifth number is the third number plus the fourth number, 1 plus 2, so the fifth<br />number in the sequence is 3. Are you clear about it now?<br />Ah, I think I understand now. Thanks so much for your explanation.<br />Okay, before we continue, does anybody have questions? Oh, Sally?<br />Mr Cook, you talked about the Fibonacci sequence in your last class, but I was sick so I missed<br />it. I don't understand it. Can you explain it to me?<br />Of course. What do you want to know?<br />I hope this isn't a silly question, but what does Fibonacci actually mean?<br />No question is ever silly. People become learned by asking questions. Fibonacci is the name<br />of a person who is considered to be one of the most talented mathematicians of the Middle<br />Ages.<br />So, what is the Fibonacci sequence? It's a sequence of numbers introduced by Fibonacci.<br />They are 0, 1, 1, 2, 3, 5, 8 and so on. Do you see how it works?<br />I have no idea. Let me show you. The first number is 0 and the second number is 1. Starting<br />the third number, each number is the sum of its previous two numbers. So the third number<br />is 0 plus 1, which is 1. The fourth number is the second number plus the third number.<br />1 plus 1 is 2. The fifth number is the third number plus the fourth number, 1 plus 2, so<br />the fifth number in the sequence is 3. Are you clear about it now?<br />Ah, I think I understand now. Thanks so much for your explanation. （1） What does the man probably teach? A . Math. B . History. C . Physics. （2） What does the man think of the girl's question? A . It's silly. B . It's difficult. C . It's worth asking. （3） What can we learn about Fibonacci? A . He was the best mathematician ever. B . He had poor health throughout his life. C . He put forward a new number sequence. （4） What is the fifth number in the number sequence? A . 2. B . 3. C . 5. 答案： A C C B

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