若已确定为胆总管下端梗阻,为明确肿块来源应首选
A.ERCP
B.十二指肠低张造影
C.ECT
D.DSA
E.MRI
参考答案:A
— Listen! Jane is singing in the next room.
— It be her. She has gone to New York.
A.can’t
B.must
C.shouldn’t
D.can
还原期的快速炼钢主要是采用强化扩散脱氧来实现。