《几何原本》中,（）是其第三条定义。

《几何原本》中,（）是其第三条定义。
A.Alineisbreadthlesslength.
B.Apointisthatwhichhasnopart.
C.Astraightlineisalinewhichliesevenlywiththepointsonitself.
D.Theendsofalinearepoints.
正确答案：D