John takes after his father. They have the same eyes, nose and hair.

A．looks after

B．is similar to

C．takes care

D．likes

按照JB/T4730.2—2005《承压设备无损检测第2部分：射线检测》的规定，射线检测时对底片上所有的圆形缺陷，都必须先按缺陷尺寸换算成点数，然后才能评级。