题目

In order to work bettering the future, each of us must first of all know our _______ and weaknesses.    A. strengths     B. benefits     C. techniques   D. values   答案：A △ABC中，AB＝AC，∠ACB的平分线CD分△ABC为两个等腰三角形，BD＝4，则BC的长为 [　　] A． B． C． D．