如图,已知二次函数y=x2+(1﹣m)x﹣m(其中0<m<1)的图象与x轴交于A、B两点(点A在点B的左侧),与y轴交于点C,对称轴为直线l.设P为对称轴l上的点,连接PA、PC,PA=PC
生物分类的主要依据是( )
在梭伦改革中,使广大平民成为享有自由权利公民的措施是
—We failed in the singing competition.—_______. Better times are waiting for you.
—My brother and I will go to the library tomorrow.— . Shall we go together?