题目

假定你是李华，下学期将作为交换生去英国剑桥大学学习。请你用英语给你的英国笔友Mike写一封电 子邮件询问一些信息，内容如下：1）旅游景点；2）当地特色；3）注意事项。注意：1）词数100词左右；2）开头和结尾已给出，不计入总词数。Dear Mike,……Yours, Li Hua 答案：Dear Mike, I'm going to study in Cambridge University as an exchange student next term. Thinking of meeting you soon, I'm more than excited. As you are local and familiar with the city, I would like to ask you for some information. Firstly, I wonder if you can recommend some places of interest which are worth visiting for a foreigner like me. In addition, would you please give me a brief introdu设函数的图象的一条对称轴是直线（1）求；（2）求函数的递减区间；（3）试说明的图象可由的图象作怎样变换得到.