— I heard they went skiing in the mountains last winter.

— It ________ true because there was little snow there.

A．may not be

B．won’t be

C．couldn’t be

D．will be

对于肺间质病变细节的观察，最理想的CT技术是()

A．高分辨率CT扫描 

B．动态增强CT扫描 

C．Bolus注射，常规增强扫描 

D．螺旋CT扫描 

E．常规CT平扫