题目

已知． （1）已知关于的不等式有实数解，求的取值范围； （2）求不等式的解集． 答案：.因为不等式有实数解，所以……………1分 因为，所以……………4分 故。……………5分 ……………6分 ①当时，，所以，故……………7分 ②当时，，所以，故……………8分 ③当时，，所以，故……………9分 综上，原不等式的解集为。……………10分   Box Office Instructions Discounts/ Service charges:     We offer children (12 and under), seniors (65 and over) and students (student ID card required) discounts on all seats. Please call the Box Office to know about any other possible discounts. Returns/ Exchanges:     We are happy to offer returns or exchanges of tickets purchased up until the close of the last business day before the show with a $3.00 per ticket fee for this service. The box office must be informed directly in order to exchange tickets to another date (this service is not available online). Friendly reminders: Latecomers will not be permitted to enter the hall until a suitable break in the performance. Children must be seated where they can be looked after by parents. Please show consideration for other audiences by not talking during the performance, and please encourage children to do the same. Cameras and recording equipment are not allowed to be used in our theatre. Please turn off all cell phones while enjoying the performance. Will call:     Please tell us at the time of booking if you would like your tickets mailed to you, otherwise they will be held for pickup at the box office. 60. We can learn from the passage that exchanges of tickets purchased ________. A. are free of charge                                         B. are not available until the last business day C. will not be given a big cash discount              D. need to contact the box office directly 61. Which of the following statements is TRUE according to the passage? A. Latecomers will not be permitted to enter the theatre. B. There is a special area for children in the theatre. C. The audience is not allowed to take photos in the theatre. D. Children can talk in a low voice during the performance. 62. According to the passage, the audience ________.        A. can receive their tickets by mail                     B. can see the performance online        C. can’t take cell phones to the theatre         D. can’t return tickets in any case