School Activities for Kids and Teens
January is a month of fun-filled activities for kids and teens as long as you know where to find them. When you want some fun activities for January, think about these ideas happening in this month.

Secret of the Dragon Time: Mon., Jan. 1, 10:30 am Cost: Adult: $7.40 Child (under 15): half Tel.: 3403 2578 Add.: Brisbane Botanic Gardens Note: Secret of the Dragon is a magical story about two children ride a dragon to explore the ocean.	The Search for Life Time: Thurs., Jan. 4, 2:00 pm Cost: Adult: $14.50 Child (under 15): $8.70 Tel.: 3403 7689 Add.: Brisbane Botanic Gardens Note: Are we truly alone in space? Is there any life out there? These are the questions asked in this show.
Magic Class Time: Fri., Jan. 12, 10:00 am Cost: Free Tel.: 3403 8470 to book your seat beforehand Add.: Centenary Community Hub, 171 Dandenong Road Note: Would you like to be a magician? Then join David, the magician, to learn about real magic with playing cards, coins, ring ropes and DIY projects and be able to become the life of the party.	Science with Me Making Your Own Guitar Time: Sat., Jul. 20, 3:00 pm Cost: Free Tel.: 3403 1226 to book your seat beforehand Add.: 10, Egginton Close Note: Do you want to make a guitar with Katy and her mom? Science with Me is going to be with you. Please remember to bring a piece of wood, a hammer, some rubber bands and some nails with you.

等比数列{a_n}的各项均为正数，且2a₁+3a₂=1，a₃²=9a₂a₆，

（Ⅰ）求数列{a_n}的通项公式；

（Ⅱ）设b_n=log₃a₁+log₃a₂+…+log₃a_n，求数列{$\frac{1}{b_n}$}的前n项和．

马克思说：“推动这次大爆炸（太平天国运动）的毫无疑问是英国的大炮。”下列理解正确的是（     ）