为明确上消化道大出血原因,首选下列哪项检查方法()
A.上消化道造影
B.B型超声检查
C.纤维内窥镜检查
D.选择性动脉造影检查
E.胸片
参考答案:C
People in the far-away mountain village cannot this program.
A.takedown
B.pickup
C.putaway
D.getalong
简述柱面装饰的作用?