题目

设集合A = {y|y = x2 + 1，x∈N*}，B = {y|y = t2 4t + 5，t∈N*}，则下述关系中正确的是（   ）    A．A = B                     B．A  B                      C．B   A                    D．A∩B = 答案：B

查看本题答案和解析