题目

假设关于某市的房屋面积（平方米）与购房费用(万元),有如下的统计数据：  (平方米)  (万元) (1)用最小二乘法求出关于的线性回归方程 (2)若在该市购买平方米的房屋，估计购房费用是多少？ （参考数据：， 线性回归方程的系数公式为，.） 答案：If you have a chance to go to Finland, you will probably be surprised to find how “foolish” the Finnish people are. Take the taxi drivers for example. Taxis in Finland are mostly high-class Benz with a fare of two US dollars a kilometer. You can go anywhere in one, tell the driver to drop you at any place, say that you have some business to attend to, and then walk off without paying your fare. The driver would not show the least sign of anxiety. The dining rooms in all big hotels not only serve their guests, but also serve outside diners. Hotel guests have their meals free, so they naturally go to the free dining rooms to have their meals. The most they would do to show their good faith is to wave their registration card to the waiter. With such a loose check, you can easily use any old registration card to take a couple of friends to dine free of charge. 20090324   The Finnish workers are paid by the hour. They are very much on their own as soon as they have agreed with the boss on the rate. From then on they just say how many hours they have worked and they will be paid accordingly. With so many loopholes（漏洞） in everyday life, surely Finland must be a heaven to those who love to take “petty advantages”. But the strange thing is, all the taxi passengers would always come back to pay their fare after they have attended to their business; not a single outsider has ever been found in the free hotel dining rooms. And workers always give an honest account of the exact hours they put in. As the Finns always act on good faith in everything they do, living in such a society has turned everyone into a real “gentleman”. In a society of such high moral practice, what need is there for people to be on guard against others? 1．While taking a taxi in Finland, a passenger____.       A．can go anywhere without having to pay the driver       B．only pays two US dollars for a taxi ride       C．can never be turned down by the taxi driver wherever he wants to go        D．needs to provide good faith demonstration before leaving without paying 2．We can know from the passage that in Finland        .       A．both hotel guests and outside diners are served food free of charge       B．big hotels provide meals for all kinds of diners       C．guests can enjoy free food once they stayed in the hotel       D．big hotels are mostly poorly  managed 3．Which of the following is NOT true according to the passage?       A．Generally speaking, in Finland, workers can get more pay by working long hours.        B．The bosses are too busy to check the working hours of their employees.       C．The workers are always honest with their working hours.        D．The workers and their bosses will make an agreement in advance about the pay. 4．The underlined word “those” in the 5th paragraph probably refers to people _____.       A．who often take taxis                             B．who often have meals in big hotels       C．who are dishonest                                                               D．who are on guard against others 5．It can be concluded that _____.       A．Finnish people are really foolish in daily life       B．Finland has been a good place for cheats       C．the Finnish society is of very high moral level       D．all the Finns are rich and therefore honest