单项选择题线性规划问题maxZ=CX,AX=b,X≥0中,选定基B,变量Xk的系数列向量为Pk,则在关于基B的典式中,Xk的系数列向量为()A、BPKB、BTPKC、PKBD、B-1PK
单项选择题Contrast is to show or emphasize similarities between two or more persons or things. ( )