当其中任何一个单元失效时，都会引起系统失效的路集称为（）。
A.最小路集
B.最小割集
C.最小交集
D.最小子集
参考答案：A
The nurse is reviewing discharge instructions with a client after an uncomplicated delivery. Which of the following symptoms is LEAST important in characterizing postpartum depression
A. Crying easily and feeling despondent.B. Loss of appetite and anxiety.C. Altered body image.D. Difficulty sleeping and poor concentration.
迷走神经对胰腺分泌的调节是（）
A．引起酶多、水和少的分泌
B．引起水、多而酶少的分泌
C．引起水、和酶均多的分泌
D．引起酶和多、水少的分泌
少的分泌