等腰三角形底边长为5,一腰上的中线把其周长分成两部分的差为3,则腰长为[ ]
A.2
B.8
C.2或8
D.不确定
答案:B
层次分析法是由哪位科学家提出的?()
A.T.L.Saaty
B.VonNeumann
C.Smith
D.Simon
The uterus returns to the pelvic cavity in which time frame()
A. 7th to 9th day postpartum.
B. 2 weeks postpartum.
C. End of the 6th week postpartum.
D. When the lochia changes to alba.