对某地小学生近视进行调查，描述患者的年龄分布可选用的统计图为（）。

A.线图

B.直条图

C.直方图

D.构成图

E.散点图

The official number of a documented vessel is（）.

A.not required to be anywhere on the vessel

B.required to be permanently marked on the vessel's structure

C.required to be painted on the vessel;s stern

D.required to be painted on the vessel's bow