The police _____ the lost boy everywhere when he suddenly turned up in a supermarket.

A．searched

B．searched for

C．was searching

D．were searching for

以下哪一项膀胱结石影像学表现是错误的

A．X线平片表现为耻骨联合上方圆形或类圆形致密影

B．病灶随体位改变位置

C．膀胱造影阳性结石表现为充盈缺损，阴性结石表现正常

D．超声示强回声光团，后方伴声影

E．无论阳性结石或阴性结石CT均表现为高密度