题目

满足不等式＞12的n的最小值为(    )A.7                      B.8                C.9             D.10 答案：解析:原不等式可写为＞12,即n2-11n+18＞0.∴n＜2(舍)或n＞9.又∵n∈N*,∴nmin=10.答案:DNot until he questioned the manager several times ___________ that the engineer-in-chief had gone to an important meeting.A.did he tellB.he toldC.was he toldD.he was told