【多选题】【消耗次数：1】
皱褶表现形式大概可以概括为（ ）。
①
Y型
②
口字型
③
工字型
④
川字型
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相关题目
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保证焊接组合工字型截面轴心受压柱翼缘板局部稳定的宽厚比限值条件，是根据矩形板单向均匀受压时下列哪种边界条件确定的
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两边简支、一边自由、一边弹性嵌固
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两边简支、一边自由、一边嵌固
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三边简支、一边自由
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四边均为简支
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award
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result
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_____the factors already referred to, people sometimes feel insecure beause their motives are misunderstood by others.
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Bur for
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Except for
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