问题：
[单选题]在CAD中用Pline命令绘制的连续线与用Line命令绘制的连续线的不同点在于( )
A、Pline的命令绘制的连续线是一个整体,而Line不是
B、Pline的命令绘制的连续线是不可用C取消上一段的,而Line可以
C、Pline命令绘制的连续线不能用C方式封闭,而Line可以
D、Pline命令只能画连续线,不能只画一条直线段,而Line可以
参考答案：
A
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