题目

You have a fever, so your parents take you to the hospital. The doctor will say ___________________ to you. ①Have a good time! ②Take some medicine and take a good rest. ③I hope you will get well soon. ④Don't worry. Drink more water. A . ①②③ B . ②③④ C . ①③④ 答案：B等比数列{an}中，若log2a2+log2a6=4，则a3a5等于A.16                                   B.－16                         C.±16                         D.±4