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一、连续型随机变量的基本概念 离散型随机变量并不能描述所有的随机试验,对于可在某一区间内任意取值的随机变量X, 由于它的值不是集中在有限个或可列个点上因此只有知道其取值于任一区间上的概率P{a
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1在一密闭容器内,储有A、B、C三种 理想气体,A气体的分子数密度为n1,它产生 的压强为p1,B气体的分子数密度为2n1,C气 体的分子数密度为3n1,则混合气体的压强为
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Ⅱ. Listening skills 1-12-a3-f4b5-c6-d7-h 9 III. Listening In Task 1: The Influence of Advertising Richard: Dad. I a pair of new shoes for an important basketball game. My old ones look
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Ⅱ. Listening skills M: The police gave a few tickets out last week along Highway 15 w: In fact, quite a few tickets were given on that road Q: What does the woman mean? 2. M: Who do you think is the smartest student in the class? w: Mary is second to none Q: What does the woman say about Mary 3. W: What are you so happy about?
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Ⅱ. Listening skills W: From what i can remember the director asked us to rehearse this a hundred times M: One hundred times? Is the director out of his mind Q: What does the man imply? 2. M: Do you think we have made enough food for the party? w: The refrigerator is about to explode Q: What does the woman imply? 3. w: She said she might become a famous movie star M: Yes, and pigs might fly
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II. Listening Skills Listening to People talk about health 1. M: I haven't been to see my doctor for a very long time. I'm worried that he'll be angry with me for not having a physical examination for so long w: Which is more important, the doctors feelings or your health? Youd better go if you want to make sure everything is all right with you. It seems that the man worries more about the doctor's feelings than his own healtl
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Into I. Basic listening practice 1. Script w: What's that? Is it a toy? Did it get chewed by a dog? M: Hey, that s my mascot! My uncle gave it to me when I was five, and it's been with me ever since. It brought me luck in all my college exams. I can t bring myself to
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Flying there is not half the fun I. Basic listening Practice I Script M: would you prefer a window or an aisle seat, madam? W: Aisle, please. If there's none left, then a wind. w seat is Ok. But I don't like middle seats。 Q: what is the order of the womans preference? C: aisle-wingdow-minddle
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1 Background knowledge 2 Presentation
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1. Background Information 2 Structure 3. Language Point 4. Appreciation of the Text
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