题目内容
【B14】
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One day, I happened to(碰巧)talk to a stranger on the bus. When he found out that I was from Chicago., he told me that one of his good friends lived there and he wondered if I happened to know him. At first I wanted to say that Chicago was a very big city. He was silent(沉默)for a few minutes, and then he began to tell me all about his friend.
He told me that his friend was an excellent tennis player, and that he even had his own tennis court(网球场). He added that he knew a lot of people with swimming pools, but that he only knew two people in the country had their own tennis courts. And his friend in Chicago was one of them. I told him that I knew several people like that. For example, my brother and my next door neighbour. I said that my brother was a doctor. The doctor had a tennis court. I told him that my next door neighbour went to Sacramento last summer and lived in the house next to my brother's. For a moment, we looked at each other. But we did not say anything.
"Would your friend's name happen to be Roland Kirkwood？" I asked finally. He laughed and said, "Would your brother's name happen to be Dr. Ray Flunter？ It was my turn to laugh.
How many people does the story involve(涉及)？
设随机变量X服从对数正态分布,E(1nX)=5,Var(1nX)=4,则P(X＜460)=________,已知1n460=6.1312。
基本以下题干，回答问题
三个男人(T,M,B)和三个女人(H,S和J)从周一到周六中每个人工作一天。这六天中每天都有人工作。有六个人中的任何两个都不在同一天工作。
在M工作的那一天与J工作的那一天之间恰好有两个完整的工作日，且在一个工作周内，M总是在J之前工作；
要么H在星期三工作，要么T在星期三工作;
若月在星期六工作，则S在星期一工作，若S在星期一工作，则S在星期六工作；
若S在星期六工作，则T在星期三工作，若T在星期三工作，则S在星期六工作。
若H在星期二工作，则谁在星期五工作？
计算责任成本时，最困难的是确定制造费用的归属，对不能直接归属于个别责任中心的费用，应优先按责任基础分配，不宜采用该基础时，可按受益基础分配。对于不属于任何责任中心的固定费用，则不应分配。()
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