Brian was about to_______________ when he suddenly found an answer to the question.

A．make up　　

B．look up　　

C．turn up　　

D．give up

X线片诊断根尖周囊肿的指标是

A．椭圆形透射区，边界较清晰，周围骨质疏松

B．较大圆形透射区，边界清楚，周围有阻射白线

C．透射区形态不规则，边缘模糊，周围骨质稀疏

D．透射区形态不规则，边缘清楚，周围稍致密

E．椭圆形透射区，边界模糊，周围骨质稍致密