题目

如图，点A在反比例函数y＝的图象上，AB⊥x轴于点B，点C在x轴上，且CO＝OB，△ABC的面积为2，则k的值为（ ）A. 4 B. 3 C. 2 D. 1 答案：【答案】C【解析】首先表示出BC，AB的长，再利用三角形面积得出k的值．设CO=BO=a，则AB=，∵△ABC的面积为2，∴×2a×=2，解得：k=2．故选：C．The Whites bought a ________ carpet at a market in the shop.A.Chinese beautiful greenB.green beautiful ChineseC.beautiful green ChineseD.Chinese green beautiful