下图为“某产业园生产链示意图”，读图完成下列各题。

你知道“年"的故事吗?读句子，标序号。

____ An old man comes to the village．He tells the people in．the village Nian is afraid of the colour red．

____ People use red things and light firecrackers at the Spring Festival every year．

____ Nian is a monster．At the end of every year，he goes into the village and eats people!

____ Nian comes down from the hills．He Sees red paper on the doors and windows．He also sees red firecrackers．

____ People glue red paper on the doors and windows．

____ Nian feels afraid and runs back into the hills．

已知等比数列{a_n}满足a₁＋a₂＝3，a₂＋a₃＝6，则a₇＝(　　)