截取部分文本
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先修科目
什么是分隔符？
分隔符就是把文本分割成若干部分的字符或文本。
例如，文本“欢迎来到|泉城济南”可以用字符“|”分割成2部分：第1部分为“欢迎来到”，第2部分为“泉城济南”。
积木：“用( )分割( )后的第( )部分”
这个积木是运算类别的报表积木。
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当你运行积木“用（分隔符）分割（文本）后的第（几）部分”，该积木首先用分隔符把文本分割成几部分，然后根据第几部分返回那一部分。任何字符都可以作为分隔符。
默认分隔符
积木“用( )分割( )后的第( )部分”的默认分隔符为“空格”。所以，如果你不修改“用”后面的输入框，文本就将用空格分割。
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