逆行胰胆管造影可
A.了解胆囊浓缩和吸收功能B.明确肝内病变的范围和性质C.了解梗阻性黄疸的部位D.可显示胆道系统和胰管E.了解胆道术后胆道系统的情况
参考答案:D
下列命题中,真命题是( )
A.四边相等的四边形是正方形
B.对角线相等的菱形是正方形
C.正方形的两条对角线相等,但不互相垂直平分
D.矩形、菱形、正方形都具有“对角线相等”的性质
— Mary was heard just now. What happened?
— John was telling a joke.[ ]
A.cry
B.to cry
C.laugh
D.to laugh