根据短文内容，完成下列各小题。

    It's four thirty in the afternoon. There are many students on the playground. Jim and his friends are playing basketball. Li Lei and other boys are playing football. Miss Gao is watching the games. She is looking after the clothes, too. Where are the girls? They are over there. Some are running, others are jumping. The twins are on duty today. They are in the classroom. Lucy is cleaning the window, Lily is sweeping the floor. They are working hard. They are tired(疲倦的) but happy.

脱式计算（能简算的要简算）

$\frac{7}{11}$ ÷9+ $\frac{1}{9}$ × $\frac{4}{11}$

12.69﹣4.12﹣5.88

0.6×3.3+ $\frac{3}{5}$ ×7.7﹣0.6                     

（ $\frac{1}{4}$ + $\frac{1}{8}$ ）×24× $\frac{1}{9}$ ．

做大做强优势农产品和优势农业产区，对带动我国农业整体素质提高，形成科学、合理的农业生产布局，推进农业现代化具有重大意义。下图是我国部分农产品优势产区布局示意图。读图回答下列问题。