题目

Su Hai and Liu Tao are _________________ their plans _________________ the summer holiday. A . talking about, to B . talking to, about C . talking about, for 答案：C设点A按向量a平移后得到点B.(1)若A(-3，2)，a=(3，-1)，求点B的坐标；(2)若a=(4，5)，B(3，-2)，求点A的坐标；(3)若A(3，4)，B(1，-1)，求平移向量a.