题目

若不等式组的解集为2<x<3,则a，b的值分别为(   )   A. 一2,3    B.2, -3    C.3,-2    D.-3,2 答案：A听录音，补全句子，完成对话。Mr. Li: Hello, Li  Ming! I 1._____ you.Li Ming: I 2._____ you, too.Mr. Li: Did you have a 3._____ trip?Li Ming: Yes! I 4.______ a great trip.