B课堂练习90102.标出2075%A+10%B+15%C80的合金30704060TC%B%50504060307020809010908070302010605040←A%
2）浓度三角形中具有特定意义的直线1）与某一边单行的直线B含对角组元浓度相等C%B%PQA%
2）浓度三角形中具有特定意义的直线
B课堂练习10904.绘出A=40%的2080合金30705.绘出C=30%的4060合金C%B%50504060307020809010AC908070302010605040←A%
2）过某一顶点作直线BA%Ca,Ba'Ba'2Caz=常数a1C%Bc,BC2BcBC2a2C1C2EC%B%-CAaa2D←A%
6.绘出C/B=1/3的合金BC125%10903B75%20807.绘出A/C3070=1/4的合金4060C%B%505016040307080209010A专9080703020106050.40←A%