答案:A
—Do you know_____ number of the students in your school?
—It's about 1, 200.[ ]
A. the
B. a
C. an
D. /
无痛性、进行性加重的黄疸,常见于()
A.胰头癌
B.急性化脓性胆管炎
C.慢性胆囊炎
D.急性胰腺炎
E.壶腹周围癌