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[单选题]
整体刚度矩阵中，一个节点只与和它直接连接的单元的节点相关联，当两节点不在同一单元上时，Kij（）
A
a大于零b等于零c小于零d无法确定
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试题答案：
B
答案解释：
这题考的是整体刚度矩阵的形成及特点：凡是不在同一单元上的两个节点之间互相没有影响，其中Kij为零。
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