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不是难,只是多数人考虑不周全。哎,要不怎么说可惜呢,要不拿来给各位解闷倒挺合适。这年头不服不忿的有的是,到头来也就哈哈一笑。
jwu
(g2w)
(#352729@0)
Last Updated: 2002-1-30
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离开学校太久了,要问我拉普拉斯变换,薛定鄂方程我不知道,还说得过去,可是昨天有人问我等比数列求和公式(x+x^2+x^3+x^4.....x^n),我竟然不知道,而且到今天也想不起来,推不出来......
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