题目

找出相应的答语⑴Is it a pencil? A. It's a dog.⑵What's your name?B. I'm twelve.⑶What's this? C. Good morning.⑷Good morning!D. I'm Daming.⑸How old are you? E. Yes, it is. 答案：【1】E【2】D【3】A【4】C【5】B已知集合A={x|x2-2x-3≤0，x∈R}，B={x|x2-2mx+m2-4≤0，x∈R，m∈R}．（1）若A∩B=[0，3]，求实数m的值；（2）若A⊆∁RB，求实数m的取值范围．