诊断原发性下肢深静脉瓣膜功能不全最可靠的检查方法为
A.下肢静脉超声多普勒检查
B.静脉造影
C.MRI深静脉成像
D.Perthes试验
E.pratt试验
参考答案:B
草料打包机
Only after my friend came________.
A.did the computer repair
B.he repaired the computer
C.was the computer repaired
D.the computer was repaired