问题
填空题
在等比数列{an}中，若a1＞0，a2a4+2a3a5+a4a6=25，则a3+a5=（ ）。
答案
5
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在等比数列{an}中，若a1＞0，a2a4+2a3a5+a4a6=25，则a3+a5=（ ）。
5
| 用方框中所给词的适当形式填空 | |
2. If I ______ you, I wouldn't tell him the truth. 3. I think we should ______to wear our own clothes. 4. I am against ______fire in the forest. It's too dangerous. 5. We should be good ________ when the teacher speaks to us in class. |