题目已知AB=E，BC=2E，则(A-C)^2B=()。A. (C)/(2)B. (A)/(2)C. 2AD. 2C已知$AB=E$，$BC=2E$，则$(A-C)^2B=$()。A. $\frac{C}{2}$B. $\frac{A}{2}$C. $2A$D. $2C$题目解答答案A. $\frac{C}{2}$