The two dogs were used to_______ in this strict way and they were once used to _____ prisoners

who had run away from prison.[ ]

A. being trained, search for    

B. being trained, looking for

C. be trained, search for        

D. training, look for

男性，70岁，慢性咳嗽、咳痰14年，多为白黏痰，每年发作3个月左右，近半年来出现上二三层楼气短，为明确诊断而就诊。查外周血白细胞为7．5×10⁹／L，分叶72％，淋巴26％，嗜酸2％，尿常规正常

下列检查中不应作为常规检查的是（）

A.肺功能

B.血气分析

C.胸部CT

D.心电图

E.胸部X线片