填空题 设(X1,X2,…,X10)为来自正态总体N(μ,σ2)的样本,已知σ2=1.580 5,S2为样本方差,求概率P{S2>2)().
单项选择题 根据短文回答 41~45 题。 Too Late to Regret it When I was a junior,I met a second-year student in my department.He wasn't tail or good-looking,but he was very nice,attractive and athletic.He had something that I admired very much.He was natural,warm,and sincere.I disregarded(不顾)my parents' disapproval.We were very happy together.He picked me up from my dorm every morning,and after class we would sit alongside the stream that ran through campus,or sunbathe(晒太阳)on the lawn.At night he would walk me back to my dorm.He came from a poor family,but in order to make me happy。he borrowed money from his friend to buy presents and meals for me.Our follow students looked up to him as a role model,and the girls envied(妒忌)me.He wasn't a local,but wanted to stay here after graduation.I thought we had a future together.However, when I got a part-time job during the summer vacation。people begin giving me a lot of pressure,saying that A pretty, intelligent girt like me should find a bettor guy to spend time with.This was also what my family thought.He spent tile summer in his hometown,so I was all by myself.When he got back,I began finding fault with him But his big heart and warmth soon drove all unpleasant thoughts away.However, I had no idea how badly I had hurt him and that things would get worse.I had a good part-time job off campus that pretty well.With my good performance at school。l also got admission to graduate school at one of China's best universities.He,on the other hand,did not do so well at school or at work.I had to worry about his living expenses,job and scores.Almost all my colleagues and friends advised me to break up with him.Then we' had a quarrel last June.He was in great pain,and my cold words and bad moods stated turning him away.Graduation time was drawing near, and he said he wanted to go back to his hometown.He said that he couldn't put up with me anymore.I was shocked and looked at him in despair.True love happens only once,but I found it out too late. 第 41 题 When did the author fall in love with the boy?( )A.After she had a quarrel with him.B.When she was a junior.C.When she was a second year student.D.After she found a part-time job.
单项选择题 根据短文回答 16~22 题。 The Industrial Age and Employment The industrial age has been the only period of human history in which most people's work has taken the form. of jobs.The industrial age may now be coming to an end,and some of the changes in work patterns which it brought about may have to be reversed,This seems a daunting(大胆的)thought.But,in fact,it could offer the prospect of a better future for work.Universal employment。as its history shows,has not meant economic freedom。Employment became widespread when the enclosures of the 17th and 18th centuries made many people dependent on paid work by depriving(剥夺)them of the Use the land.and thus of the means to provide a living for themselves.Then the fact. system;destroyed the cottage industries and removed work from people's homes.Later, as transport improved,first by rail and then by road,people commuted(乘车往返)longer distances to their places of employment until.Eventually, many people's work test all connection with their home lives and the places in which they lived.Meanwhile employment put women at a disadvantage.In pre—industrial times。men and women had shared the productive work of the household and village Community Now it became customary(惯例的)for the husband to go out to paid employl+1tent,leaving the unpaid work of the home and family to his wife.Tax and benefit regulationsstill assume this norm today,and restrict more flexible sharing of work roles between the Sexes.It was not only women whose work status suffered.As employment because the dominant form. of work,young people and old people Were excluded—a problem now,as more teenagers become frustrated at school and more retired people want to live active lives.All this may now have to change.The time has certainly come to switch some efforts and resources away from the utopian(乌托邦的)goal of creating jobs for all.to the urgent practical task of helping many people to manage without full-time jobs. 第 16 题 The established work patterns may be changed with the closing of the industrial age.( )A.Right B.WrongC.Not mentioned