My grandpa's birthday is on ____(Oct. 12th/ Oct. 12nd )
若椭圆x2a2+y2b2=1(a>b>0)的离心率为12,则双曲线x2a2-y2b2=1的渐近线方程为( )
被誉为“杂交水稻之父”,为我国粮食增产作出巨大贡献的科学家是( )