题目

200件产品中有3件次品，任意抽取5件，其中至少有2件次品的抽法有(      )     A.种                 B.+种     C.-种               D.-种 答案：B. 解析:至少有2件次品分两类，①2次3正；②3次2正，故抽法为+，即是B选项的列式，若用排除法列式，要排除1次4正和5件全正两个类别，故C、D选项错误.    Chinese writer Mo Yan won the Nobel Prize in Literature in 2012. Mo, who was born in 1955 into a farmer’s family in Gaomi County in Shandong Province, is the first Chinese national to win the Nobel Prize in Literature. In his early years, life was not easy. These things have influenced Mo Yan’s later writing. 60-year-old Park Geun-hye (朴槿惠)was elected（选举）the new President of South Korea in December, 2012. She becomes the country’s first woman head of state and her term (任期) will last five years from 2013. “I will become a president who puts people’s living before anything else,” she told the cheering People in central Seoul as she accepted her win. Barack Obama (born in Honolulu, Hawaii in 1961), who was elected the 44th President of the United States in 2008, has been elected again to a second term, fighting against Republican challenger Mitt Romney. Obama finished his study from Columbia University and Harvard Law School. His father was from Kenya, Africa while his mother was born in Kansas, America. 【小题1】When Mo Yan was young, his family might be   .A．big B．small C．rich D．poor 【小题2】Which of the following is NOT true about the passages?A．The writer Mo Yan might live in a small place before he got the prize. B．Park Geun-hye will lead South Korea till the year 2018. C．Obama’s parents came from the same country before they married. D．Among the three persons, Park Geun-hye is the oldest. 【小题3】The three passages may be from   .A．an email B．a letter C．news D．an advertisement