先天性胆总管囊肿切除、肝总管十二指肠吻合术后,易发生哪些并发症()
A.肠内容物反流感染
B.吻合口狭窄
C.十二指肠溃疡
D.术后远期易发生癌变
E.胆汁性胃炎
参考答案:A, B
下列各式计算正确的是( )
A.(xy)3=xy2
B.(-4xy2)2=16x2y4
C.(2xy)3=6x3y3
D.(-3x2)2=-3x4
—____
—She is a nurse.
A.Who is your mother?
B.Is your mother a nurse?
C.Where is your mother?
D.What does your mother do?