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图示结构A截面的弯矩为(     的答案

图示结构A截面的弯矩为(     )

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2021-07-17 19:03
<img src、"http://sichuan.ouchn.cn/pluginfile.php/61593/question/answer/266991/4/246728/3-04-A%E3%80%81B.png" alt="" width="32" height="27"><em> </em>,上侧受拉
<img src、"http://sichuan.ouchn.cn/pluginfile.php/61593/question/answer/266991/4/246729/3-04-A%E3%80%81B.png" alt="" width="32" height="27">,下侧受拉
<img src、"http://sichuan.ouchn.cn/pluginfile.php/61593/question/answer/266991/4/246730/3-04-C%E3%80%81D.png" alt="" width="43" height="27">,上侧受拉
<img src、"http://sichuan.ouchn.cn/pluginfile.php/61593/question/answer/266991/4/246731/3-04-C%E3%80%81D.png" alt="" width="43" height="27">,下侧受拉
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正确答案
 ,上侧受拉

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