题目

把Rt△ABC各边的长度都扩大3倍得Rt△A’B’C’,那么锐角A,A’的余弦值的关系为(   ) A.cosA=3cosA’          B.3cosA=cosA’        C.cosA=cosA’           D.不能确定 答案:CThe suit fitted him well________ the brighter color.A. except for B. except that C. beside D. besides
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