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Come and 1 my 2. This is my father. 3 is a tall man. This is my 4. She is5 art teacher. 6 boys are my two brothers. I'm a girl. I’m my 7daughter. And there is a cat in 8 family. Its name 9 Lily. We all like10.
我国各地降水年际变化大,主要原因是( )