罩伞型胆囊癌声像图特点的是（）。
A.基底较窄
B.边缘整齐
C.常见单发
D.弱回声或中等回声多见
E.后方回声增强
参考答案：D
Linda often _____ her homework in the evening, but this evening she _____ TV. [ ]
A. does; watches
B. is doing; watches
C. does; is watching
D. is doing; is watching
当用DV把影像拍好了之后一般有哪二种保存的方法？
