给实验鼠静脉注射不同剂量的胰岛素，测得血糖的补充速率和消耗速率如下图所示。下列相关分析正确的是（  ）

25=____×5＋____

25÷5=____……____ 

阅读下面材料，在空白处填入适当的内容或括号内单词的正确形式。

    There are all kinds of festivals throughout the world. Festivals are held____ (satisfy) and please the ancestors, to honor some famous people or important____(event), and to express people's gratitude to the God for bringing them a year of plenty. For example, in India, October 2 is ____national festival to honor  Mahandas Gandhi, the leader____helped gain India's ____(depend) from Britain.____ (tradition), in China the Spring Festival, which ____(celebrate) in January or February, is the most ____(energy) and important because it is a festival that looks forward____the coming of spring. Why are all these festivals everywhere? Because during the festivals, people can get together to eat, drink and have fun with each other,____ (forget) all the daily struggle and demands for a while.

世界上最长的铁路是：

等差数列$\left\{a_n\right\}$中，如果$a_1+a_4+a_7=39$，$a_3+a_6+a_9=27$，则数列$\left\{a_n\right\}$前9项的和$S_9=$（ ）