①规则不是一成不变的
②规则需要调整和完善
③规则的制定是领导部门的事,与我们无关
④所有规则都只维护少数人的利益
Mr.Li often drives his car to work,but he rides a bike there.
You won't ____ the school bus ____ you get up late.
如图1在平面直角坐标系中.等腰Rt△OAB的斜边OA在x轴上.P为线段OB上﹣动点(不与O,B重合).过P点向x轴作垂线.垂足为C.以PC为边在PC的右侧作正方形PCDM.OP= 2 t、OA=3.设过O,M两点的抛物线为y=ax2+bx.其顶点N(m,n)