给下列句子排序。

1. Yes, now they are old.

2. Yes, now my hair is long.

3. Oh, who are they, Lingling?

4. They were young then.

5. Who is the little girl?

6. They are my grandparents.

7. It's me. I was two then.

8. But your hair was so short.

9. It's my best loved photo.

10. What's this?

正确的顺序是：_____________________

蜜蜂喜欢逆风而去，顺风而归。这种特性易造成蜜蜂（）现象，蜜蜂偏集会造成病害蔓延等不良后果。