By using a definite integral identical formula, a solution to some multiple-choice questions of definite integral is given.
借助于一个积分恒等式，给出了几道定积分选择题的一种求解方法。
By using a definite integral identical formula, a solution to some multiple-choice questions of definite integral is given.
借助于一个积分恒等式，给出了几道定积分选择题的一种求解方法。
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