1、严格地说，地球的形状是一个·······································（ ）
A、正球体 B、球体 C、圆 D、两极稍扁、赤道略鼓的椭球体
2、关于经纬线的说法，正确的是·······································（ ）
A、每条经线都自成一个圆圈 B、纬线长度都相等
C、地球仪上经线有360条 D、纬线指示东西方向
3、本初子午线的经度是···············································（ ）
A、1800 、00 、1600E D、200WCB
4、赤道是···························································（ ）
A、划分经度的起点 B、东西半球的分界线
C、南北半球的分界线 D、900纬线
