题目

— Last weekend, we went for a swim and caught a lot of fish in the river.— ______!        A. Good idea                       B. What fun        C. Good luck      D. How funny 答案:B3.如图,在平面直角坐标系中,点O为坐标原点,△ABC是直角三角形,∠ACB=90°,点B、C都在第一象限内,CA⊥x轴,垂足为点A,反比例函数y1=$\frac{4}{x}$的图象经过点B;反比例函数y2=$\frac{2}{x}$的图象经过点C($\sqrt{2}$,m).(1)求点B的坐标;(2)△ABC的内切圆⊙M与BC,CA,AB分别相切于D,E,F,求圆心M的坐标.
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