此病人首先考虑诊断为
A.中、下段胆管癌
B.胆囊癌
C.肝门部胆管癌
D.胆囊结石
E.胆总管结石
参考答案:A
The old man was too poor ___________a room _________ .
A.have; to live
B.to have; live
C.to have; to live
D.to have; to live in
能引起猩红热的是()
A.化脓性链球菌
B.轮状病毒
C.风疹病毒
D.冠状病毒
E.单纯疱疹病毒