题目

已知集合= ，=. （1）若集合，求集合； （2）设集合 ，满足，求实数的取值范围. 答案：．解：（1）                                           6分    （2）                                             12分   五个年轻人正各自打算选择不同的交通方式出行。请仔细阅读第1-5题中的个人情况说明和A到F六种交通方式的介绍，选出符合各自要求的最佳选项，其中一项为多余选项。 1．The City Library is in the downtown．Li Fei is planning to write a report about the flood(洪水)．He'd like to go to the City Library to look for some information．There is a small bus station near his home． 2．Wang Tao lives in Beijing．He will have three days off next week．He is interested in traveling．So he is going sightseeing in Shanghai．He'd like to get there as soon as possible(尽快)．He is sure he will have fun in Shanghai． 3．Jin Ling likes taking photos, especially photos of rivers and mountains．She is excited that her parents will take her to the Three Gorges(三峡)．She hopes she can take many photos when they are traveling on water． 4．This month Chen Xu will visit her grandparents in her hometown．It is about 1, 000 kilometers away．Chen Xu hopes to get there in ten hours．And she will be able to enjoy the sights along the railway(铁轨)． 5．Zhang Kai is a volunteer in a green group．Tomorrow he is going to listen to a talk in the central park．The park is nearly four kilometers away from his home, and he has decided to choose a way that is good for the environment．(环境)