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一個(gè)很白癡的力學(xué)問(wèn)題向各位大俠請(qǐng)教 |
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點(diǎn)評(píng)
I=3.14*d^4/64才對(duì)吧? 我一般都是取E=206GPa的,,其實(shí)是我搞錯(cuò)單位了,,但我也不知道我算得對(duì)不對(duì)
不好意思了兄弟,讓你飯糊了,,有緣相聚我請(qǐng)你吃飯
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點(diǎn)評(píng)
M對(duì)mm,。,。。,。,。好像是錯(cuò)了,我真白癡,。,。。
評(píng)分
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