定义域是一切实数的函数,其图像是连续不断的,且存在常数()使得对任意实数都成立,则称是一个“—和谐函数”. 有下列关于“—和谐函数”的结论:①是常数函数中唯一一个“—和谐函数”; ②不是一个“—和谐函数”; ③是一个“—和谐函数”;④“—和谐函数”至少有一个零点。则正确结论的序号为 (写出所有正确结论的序号).
情景交际。根据对话的情景,从方框中选择适当的句子填在画线处,使对话完整通顺。
Jane:Tomorrow is Saturday.What do you often do on weekends?
Bill: 1 What about you?
Jane:I often go to the movies.
Bill: 2 How often do you go to the movies?
Jane: 3
Bill:What's your favorite movie?
Jane: 4
Bill:Who do you often go with?
Jane: 5
Bill:Are you going there this weekend?
Jane:Yes, do you want to go with us?
Bill:Sorry, I have a lot of work to do.