问题描述：
there is no power like the power of confidence,and there is no student as c
there is no power like (the) power of confidence,and there is no student as competitive as (a) student who trusts his own abilities.为什么添括号里的词
there is no power like (the) power of confidence,and there is no student as competitive as (a) student who trusts his own abilities.为什么添括号里的词
问题解答：
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