题目

听下面一段独白，独白后有5个小题，请从题中所给的A、B、C三个选项中选择正确选项。 （1） Where will they go next month? A . London. B . New York. C . Toronto. （2） How long will they stay there? A . For three weeks. B . For two weeks. C . For one week. （3） What color of the shirt do they need to wear? A . Black. B . Red. C . White. （4） What is the office phone number? A . 850-4436. B . 580-4463. C . 580-4436. （5） What's the job of Mrs. Smith? A . An English teacher. B . A cleaner. C . A数列{an}满足a1=a，an+1=an+32，n=1，2，3，…．（Ⅰ）若an+1=an，求a的值；（Ⅱ）当a=12时，证明：an＜32；（Ⅲ）设数列{an-1}的前n项之积为Tn．若对任意正整数n，总有（an+1）Tn≤6成立，求a的取值范围．