A
A.向量组 $alpha_{1}＋alpha_{2},alpha_{2}＋alpha_{3}，alpha_{3}＋alpha_{1}$ 线性无关；
B
B.向量组 $alpha_{1},２alpha_{2},３alpha_{3}$ 线性无关；
C
C.向量组 $alpha_{1}＋alpha_{2},alpha_{2}＋alpha_{3}，alpha_{3}－alpha_{1}$ 线性无关；
D
D.向量组 $alpha_{1}＋２alpha_{2},２alpha_{2}＋３alpha_{3}$ 线性无关。
