肝外阻塞性黄疸原因不明时，应行
A．胆囊造瘘术
B．胆总管探查及引流术
C．肝叶切除术
D．胆总管十二指肠吻合术
E．胆囊切除
参考答案：B
What problems have you had in the western part of the country? [ ]
A.work
B.worked
C.working
D.to work
光绪大婚六天后，便举行了亲政大典。
