题目

 若 a＞0，b＞0 ，且 ，则的最小值是()． A. 9                B. 8              C.              D. 6 答案： A 【解析】 =+ 1 =+ 1 =+1≥+ 1 = 9．∴ 当 a = b=时，原式取最小值 9． ______ people attended the meeting. ［　　］ A. No many　B. Very a few　C. Few　D. Not many of