在播种(或定植)时施在种子或幼苗根附近,其目的是给种子萌发或幼苗生长创造良好的营养和环境条件的肥料是()
A.基肥
B.种肥
C.追肥
D.有机肥
参考答案:B
二次函数y=-2x2+4x+1的对称轴和顶点坐标分别是( )
A.x=-1,(1,3)
B.x=-1,(-1,3)
C.x=1,(-1,3)
D.x=1,(1,3)
When they broke open the door, they found a strange man lied on the floor unconscious.
A.lay
B.laid
C.lain
D.lying