【简答题】People from divorced families are more likely to become divorced themselves, especially if ______.
【简答题】Lisa never had the chance to know her father. He and her mother divorced when she was just a young child. Even though he didn’t move far, he never came to visit his children. Lisa often wondered about...
【单选题】Many young couples do not take marriage______and they get married and divorced easily.
【单选题】下列各式中: 2 x +y=1 ;3x-2y;5xy=1; x 2 +y=1 ,其中不是二元一次方程的有( )