A:适合方程②的x,y的值是方程组的解
B:适合方程①的x,y的值是方程组的解
C:同时适合方程①和②的x,y的值是方程组的解
D:同时适合方程①和②的x,y的值不一定是方程组的解
I like spring before.It was windy.
将下面的结构和发育情况用线连接起来
Our teachers have been with us for nearly three years _______ we came to junior high school. We should thank them for what they have done for us.