位于x轴上的点的坐标的特点是______．
位于x轴上的点的坐标的特点是纵坐标为0．
故答案为：纵坐标为0．
The news that he failed in the exam _____________ his unhappiness this morning.
A．accounted for
B．accounting for
C．had accounted for
D．to account for
