胆道疾病首选的检查方法是（）
A.口服胆囊造影
B.腹部平片
C.静脉胆道造影
D.B超
E.经皮肝穿刺胆管造影
参考答案：D
She was afraid that unless the train speeded up she would lose her _____ to Scotland.
A．ticket
B．place
C．seat
D．connection
慢性支气管炎的主要诊断依据是（）
A.痰细菌检查
B.肺部体征
C.肺功能测定
D.X线胸片
E.临床症状
