题目

—Do you know _________?      — Not until next Friday.A. when will we have the sports meeting  B. how soon we will have the sports meetingC. when we had the sports meeting         D. how soon will we have the sports meeting 答案：B（2012•闸北区二模）设{an}是公比为q的等比数列，首项a1=164，对于n∈N*，bn=log12an，当且仅当n=4时，数列{bn}的前n项和取得最大值，则q的取值范围为（　　）A．(3，23)B．（3，4）C．(22，4)D．(22，32)