未知题型 伊朗核问题( )。 世纪以来影响地区安全的重大热点问题

单项选择题 51～65 Man of Few WordsEveryone chases success,but not all of US want to be famous. South African writer John Maxwell Coetzee is________(1)for keeping himself to himself.When the 63-year-old was named the 2003 Nobel Prize winner for literature earlier this month,reporters were warned that they would find him, particularly difficult to________ (2)' Coetzee lives in Australia but spends part of the year teaching at the University of Chicago He seemed________ (3)by the news that he won the us$1.3 million prize.'It came as a complete surprise.1 wasn't even aware they were due to make the announcement,'he said. His________ (4)of privacy led to doubts as to whether Coetzee will attend the prize。giving in Stockholm,Sweden,on December 10. But despite being described as________ (5)to track down,the critics agree that his writing is easy to get to know. Born in Cape Town,South Africa,to an English-speaking family,Coetzee________(6)his breakthrough in l 980 with the novel' Waiting for the Barbarians(野蛮人)' He________ (7)his place among the world。S leading writers with two Booker prize victories,Britain。S highest honour for novels.He first________ (8)in l 983 for the' Life and Times of Michael K',and his second title came in l999 for 'Disgrace'A major theme in his work is South African's former apartheid(种族隔离)system,which divided whites from blacks.________ (9)with the problems of violence。crime and racial division that still exist in the country.his books have enabled ordinary people to understand apartheid________ (10)within. 'I have always been more interested in the past than the future。'he said in a rare interview.'The past________ (11)its shadow over the present.I hope I have made one or two people think________ (12) about whether they want to forget the past completely.' In fact this purity in his writing seems to be________ (13) in his personal life. Coetzee is a vegetarian,a cyclist rather than a motorist and doesn't drink alcohol. But what he has________ (14)to literature,culture and the people of South Africa is far greater than the things he has given up.'In looking at weakness and failure in l№.'the Nobel prize judging panel said,'Coetzee'S work________ (15) the divine (神圣的) spark in man.' 第 51 题 请选择（1）处的最佳答案。A．looked after B．well known C．locked D．Protected

问答题 某纺纱厂为比较甲、乙两个品种棉花的质量，分别从用两种棉花纺出的纱中抽取了若干样品，测其抗拉强度，得数据如下： 甲品种：1．58 1．49 1．43 1．60 1．53 1．47 1．56 乙品种：1．42 1．46 1．34 1．38 1．54 1．38 1．51 1．40 假定两种纱的抗拉强度服从等方差的正态分布，试问在显著性水平0．05和0．01下，两种棉纱的平均抗拉强度是否相同?