It is said that Chen Shuibian is ________ to flee from Taiwan because of the campaign against him.[ ]

A．possible  

B．perhaps

C．probable  

D．likely

根据无损检测方法的原理、特点和适用范围判断，如果对一台材料为奥氏体不锈钢的压力容器筒体纵焊缝进行表面缺陷的检测，宜采用（）检测方法。

A．涡流

B．声发射探伤

C．磁粉

D．渗透