It was in the lab________was taken charge of by Johnson________they did the experiment. [ ]

A. where; which  

B. which; that

C. which; which  

D. that; which

肺隔离症最重要的确诊依据是

A．好发于两下肺后基底段，尤以左下多见

B．青年患者居多，多数无明显症状

C．呈三角形或类圆形，其内可见囊性结构，边缘多清楚

D．螺旋CT动态增强显示血供来自体循环

E．CT增强实质部分强化