尿胆红素试验阳性的疾病有（）
A.肝硬化
B.梗阻性黄疸
C.胆石症
D.胰头癌
E.Rotor综合征
参考答案：A, B, C, D, E
The Smiths________through millions of ups and downs since they moved to Sydney. [ ]
A. have gone
B. had gone
C. went
D. has gone
何为流体的动力精度？
