The code must select only ELEMENT type nodes, because TEXT nodes do not support this method and produce a non-recoverable error in Perl.
在代码中只能选择element类型的节点，因为该方法不支持TEXT节点，并且会在Perl中产生一个不可恢复的错误。
In this paper, We developed a select main element iterative method. For a class linear system of divergence discussed convergence, and illustrate by examples.
本文提出了一种选主元迭代法。对一类发散的线性系统讨论了其收敛性，并举例说明之。
In this paper, We developed a select main element iterative method. For a class linear system of divergence discussed convergence, and illustrate by examples.
本文提出了一种选主元迭代法。对一类发散的线性系统讨论了其收敛性，并举例说明之。
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