如果点C是线段AB靠近B的黄金分割点,且AC=2,那么AB= 。
1+
答:由题可知:
黄金分割点的比例是(√5-1)/2;因AC=2;故AB=√5-1
AB=√5-1+2=+1
Janny ____ have kept her word. I wonder why she changed her mind. [ ]
A. must
B. should
C. need
D. would
乌梅在二陈汤中的功用是( )
A.涩肠止泻B.收敛肺气C.安蛔止痛D.生津止渴E.收敛止血