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当前学科：胆石症
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口服胆囊造影时胆囊显影，不能说明下列哪项()
A . A．胆囊管通畅
B . B．胆囊有浓缩功能
C . C．胆囊有分泌功能
D . D．胆囊形态是否正常
E . E．观察胆囊收缩情况
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