Hello, my____ is Li Ming. I am 14 years old．I go to Ximen School. This is a photo ____ my family. They____ my parents. He is my father and she is my mother. My father is 40 years old and my mother is 38 years old．My father is a ____in a hospital . My mother is an English____ in my school.My sister is 12 years old .We are in the ____ school .There are two big____ in front of my house. I____ my family.

①若m∥α，n⊂α，则m∥n

②若α⊥β，m⊥α，n⊥β，则m⊥n③若m⊂α，n⊂β且m⊥n，则α⊥β

④若m，n是异面直线，m⊂α，n⊂β，m∥β，则n∥α

某学校每天需将1000kg、20℃的水烧开供师生饮用．