lichuanfeng 幼苗
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meiqijingh 幼苗
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________ (sudden), they saw a snake in front of them. They didn't know what to do.
10个月前
The teacher asked me to ____ the exercise books before we began to do our homework.
1年前
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________ mothers can't come to the meeting because they have gone to Dalian.
1年前
平面直角坐标系内,A(-1,0),B(1,0),C(4,﹣3),P 在以 C 为圆心 1 为 半径的圆上运动,连接 PA,PB,则 PA^2+PB^2 的最小值是________ .
1年前