题目

下列二次根式：中，是最简二次根式的有（ ）               A．2个                        B．3个                        C．4个                        D．5个 答案：A．                                                                                                    --Are you satisfied with his reply? --Not at all. It couldn’t have been ______ .A．any worseB．so badC．much betterD．the worst