燃气管网压力的调节过程包括定值调节系统，随动调节系统和（）。
参考答案：程序控制系统
根据首字母和汉语提示完成下面的语段。
Look! The g__________ (女孩) is Sarah. She is a s__________ (学生). Mike is a b__________ (男孩).
They have a f__________ (朋友). She's Miss White. She's a t__________ (老师). We like her.
This is my family.
He is a teacher.
My brother is a police officer.
My mother is a bus driver.
My father is a doctor.