题目

已知=(3,4),A(-2,-1),则B点的坐标是(    )A.(5,5)             B.(-5,-5)              C.(1,3)             D.(-5,5) 答案：解析：设B(x,y), =(x,y)-(-2,-1)=(x+2,y+1),即(x+2,y+1)=(3,4),∴∴∴B点的坐标为(1,3).答案：C22. —— Can I get the house cheaper?—— Sorry, it’s ______ my power to sell it any cheaper.A．withoutB．exceptC．beyondD．out