—I think art is very interesting.

—_________.Music is more interesting than art.[ ]

A. I disagree

B. I think so    

C. I agree  

D. I don't know

高千伏摄影特点的叙述，正确的是（）

A.获得层次丰富的X线照片

B.缩短曝光时间，减少被照体移动模糊

C.减少管电流，延长X线管寿命

D.散射线减少，照片对比度较高

E.有利于病人防护