extreme and mean ratio
... 中外比 extreme and mean ratio; 中外关系 Sino-foreign relation; 中外合股 Chinese and foreign shareholders; ...
comparison between China and abroad
Western Finance and Accounting
China Construction Metal Structure
分已知线段为两部分,使其中一部分是全线段与另一部分的比例中项的数学问题。作法很简单,设已知线段为AB,作BD⊥AB使BD=AB/2,连接AD,以D为心,BD为半径作弧交AD于E,再以A为心,AE为半径作弧交AB于C,则C就是所求的分点。AC=(√5-1)/2AB 记 G=(√5-1)/2=0.6180339…